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NXP KM3x Reference guide

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© 2015 Freescale Semiconductor, Inc. All rights reserved.
KM3x_256 Based Three-Phase Power Meter
Hardware Design Reference Manual
1 Introduction
The Freescale three-phase power meter reference design
is designed according to the China State Grid
Corporation standard Q/GDW354-2012 Functional
Specification for Smart Electricity Meters and standard
Q/GDW 356-2012 Type Specification for Smart
Polyphase Electricity Meters.
The reference design aims to reduce the time to market
for power meter customers and partners, and tailor the
design to the user’s unique needs in their powering
system.
Freescale Semiconductor, Inc.
Document Number: DRM164
Design Reference Manual
Rev. 1
,
09/2015
Contents
1 Introduction 1
2 Demo board content 4
3 Demo board hardware features 5
4 Three-phase power meter demo board 6
4.1. System power ....................................................... 6
4.2 Clock ................................................................... 7
4.3 Debug interface .......................................................... 7
4.4. Voltage sampling and frequency measuring ........... 8
4.5. Current sampling .................................................. 9
4.6. External memory ................................................ 10
4.7. Tamper protection ............................................... 11
4.8. Pulse output ........................................................ 13
4.9. RS485 interface .................................................. 13
4.10. LCD display and backlight .................................. 14
4.11. Jumper table ....................................................... 15
5. Summary 16
6. References 16
7. Revision history 16
Introduction
KM3x_256 Based Three-Phase Power Meter Hardware Design Reference Manual, Rev. 1, 09/2015
2 Freescale Semiconductor, Inc.
The three-phase power meter reference design uses the Freescale ARM
®
Cortex
®
-M0+ core 144-PIN
LQFP KM34Z256 SoC to realize all the metering and application functions.
Figure 1. KM34Z256 block diagram
Introduction
KM3x_256 Based Three-Phase Power Meter Hardware Design Reference Manual, Rev. 1, 09/2015
Freescale Semiconductor, Inc. 3
The hardware design consists of the power board and the main board. The following figure shows the
system diagram:
Figure 2. System block diagram
Demo board content
KM3x_256 Based Three-Phase Power Meter Hardware Design Reference Manual, Rev. 1, 09/2015
4 Freescale Semiconductor, Inc.
2 Demo board content
The following figure shows the demo board:
Figure 3. Power meter demo
Demo board hardware features
KM3x_256 Based Three-Phase Power Meter Hardware Design Reference Manual, Rev. 1, 09/2015
Freescale Semiconductor, Inc. 5
The following figure shows the hardware connection method:
Figure 4. Power meter demo without casing
3 Demo board hardware features
The Freescale three-phase power meter includes the following hardware features:
• An ARM Cortex-M0+ core MKM34Z256VLQ7, a 144 LQFP, 75 MHz, 256 KB flash memory,
and a 32 KB SRAM.
• 3 x 220/380 V voltage inputs generate two isolated 5 V DC outputs; one is for the system while
the other one is for 485 communications.
• Current sampling: a 0.05 % accuracy CT, a 25 ppm shunt, and a 24-bit SD ADC.
• Voltage sampling: a 25 ppm resistor divider, and a 16-bit SAR ADC.
Three-phase power meter demo board
KM3x_256 Based Three-Phase Power Meter Hardware Design Reference Manual, Rev. 1, 09/2015
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• A KM34 internal ACMP module for zero cross point detection.
• 5 ppm accuracy RTC is achieved using an external 0.5 ˚C resolution temperature sensor, an
external 32.768 kHz crystal and an internal RTC module.
• One isolated RS485 output in half-duplex mode, with an ISL3152EIBZ.
• An infrared circuit with an AT205B as a transmitter and a TSOP4838 as receiver.
• An external 512 KB I2C EEPROM 24LC512 and 64 MB SPI flash MX25L6406EM2I-12G
provide the memory extension.
• 3 x isolated electrical pulse output, 3 x light pulse output for meter calibration/indication/test.
• Tamper protection: A tamper input pin detects box opening and an I2C based magnetic sensor
detects activity.
• Display: JIYA eight 32-segment LCD display modules with backlight control.
4 Three-phase power meter demo board
4.1. System power
The demo board is powered by 220 V AC. The power board transfers the grid AC voltage into two
isolated linear 5 V DC outputs. One 5 V DC output for powering the MCU system while the other one is
for isolated RS485 communication.
In power line off mode, the system has a 6 V lithium battery as backup power. One 3.6 V battery powers
the RTC, this battery must not be changed in the meter’s lifespan.
As the MCU system has a 3.3 V DC input, it needs an LDO to transfer the 5 V input to 3.3 V output in
the system. The LDO must have low quiescent current and low noise.
The following 2 figures illustrate the DC/DC and battery supply circuit.
The KM3x based metering system uses an internal ADC voltage reference; however to achieve higher
accuracy the meter must have an external high accuracy voltage reference. See Figure 6.
CURRENT MEASURING
GND
TP2
SYSTEM GND INPUT PAD
SYSTEM 5V VOLTAGE INPUT PAD
GND
C10
0.01uF
GND
+
C1
220uF
10V
D1
BAT760
A C
GND
U1
SPX3819M5-L-3-3
EN
3
VIN
1
GND
2
BYP
4
VOUT
5
GNDGND
GND
3V3_POWER
GND GND
J3
HDR 1X2 TH
1
2
GND
BT2
12
6V BATTERY
3V3D_MCU
3V3A_MCU
D4
1N4001
A C
D3
1N4001
A C
GND
LDO Power Supply
GND
C2
10UF
C11
10UF
C5
10UF
C6
10UF
C7
10UF
C8
10UF
C4
0.1 UF
C9
0.1 UF
C3
0.1 UF
C12
0.1 UF
F1
TRF06-035V06-TF
1 2
L1 10uH
1 2
TP1
L2 10uH
1 2
J1
HDR_1X1
1
GND
6V BAT
+5V_MCU
Figure 5. DC power supply
Three-phase power meter demo board
KM3x_256 Based Three-Phase Power Meter Hardware Design Reference Manual, Rev. 1, 09/2015
Freescale Semiconductor, Inc. 7
Figure 6. External VREF supply option
4.2 Clock
The KM34 system has an external Citizen +/-20 ppm 32.768 kHz crystal. RTC clock generation is also
performed by the crystal, that requires a high consistency of performance level.
GND GND
RTC Crystal
C69
18pF
DNP
C68
18pF
DNP
GND
XTAL32K
{3}
EXTAL32K
{3}
Y1
32.768kHz
12
TP28
Figure 7. Oscillator circuit
4.3 Debug interface
The KM34 system uses a SWD debug port, J-Link and Multilink tools can be used for code developing
and debugging.
Three-phase power meter demo board
KM3x_256 Based Three-Phase Power Meter Hardware Design Reference Manual, Rev. 1, 09/2015
8 Freescale Semiconductor, Inc.
The software uses the IAR tool chain (version 7.3 or higher), which can be configured to use the
selective hardware debugger.
SW2
EVQ-PE105K
1 2
3V3D_KM
3V3D_KM
R114
4.7K
C78
0.1 UF
R115
820
C71
0.1 UF
J6
HDR 2X5
1 2
3 4
65
7 8
9 10
SWD Debug
GNDGND
GND
/RESET
{3}
SWD_CLK
{3}
SWD_DIO
{3}
Figure 8. KM debug port
4.4. Voltage sampling and frequency measuring
The power line voltage sampling is done by a 16-bit SAR ADC. 220 V AC is transformed to
approximately 0.17 V AC by a resistor divider. The circuit adds a 0.6 V DC offset to this AC signal then
sends it to the SAR ADC for sampling.
The 0.6 V DC offset is generated by the KM34 internal 1.2 V VREF output and external amplifier
divider circuit by default.
There is an option to use an external 1.2 V VREF for the system. This requires a software switch
configuration.
Three-phase power meter demo board
KM3x_256 Based Three-Phase Power Meter Hardware Design Reference Manual, Rev. 1, 09/2015
Freescale Semiconductor, Inc. 9
The following figure shows the voltage sampling circuit:
R47
1K
DNP
GND
R24
1K
R38
1K
R11
220K
DNP
R14
220K
DNP
R26
220K
DNP
R29
220K
DNP
R40
220K
DNP
R44
220K
DNP
VBIAS
R20
100K
DNP
VBIAS
VBIAS
R12
100K
DNP
R15
100K
DNP
R16
100K
DNP
R30
100K
DNP
R31
100K
DNP
R35
100K
DNP
R27
100K
DNP
R41
100K
DNP
R48
100K
DNP
R46
100K
DNP
R45
100K
DNP
GND
GND
GND
D6
BAV99LT1
1
3
2
C43
0.01uF
TP7
DNP
R13
47.0
3V3A_KM
TP5
DNP
TP6
DNP
PH_A_Before_Divider
TP4
DNP
GND
PH_A_After_Divider
Voltage Sampling
ADC0_SE0
{3}
GND
GND GND
D7
BAV99LT1
1
3
2
C47
0.01uF
TP15
DNP
R28
47.0
TP11
DNP
3V3A_KM
TP14
DNP
TP10
DNP
PH_B_Before_Divider
PH_B_After_Divider
GND
ADC0_SE1
{3}
GND GND
GND
D8
BAV99LT1
1
3
2
TP20
DNP
C51
0.01uF
R42
47.0
3V3A_KM
TP17
DNP
TP21
DNP
PH_C_Before_Divider
TP16
DNP
GND
PH_C_After_Divider
ADC0_SE2
{3}
R10
1K
R17
1K
DNP
GND
R32
1KDNP
GND
Figure 9. Voltage sampling circuit
4.5. Current sampling
Current sampling is performed by an AFE 24-bit ΣΔ ADC module. The load current passes through the
primary side of the CT (with 5/100 A current, 0.05% accuracy, and 2500 ratio). The secondary side
current flows through the 3.9 R shunt resistor to generate a differential voltage to the ΣΔ ADC.
For some pads the voltage sampling function is multiplexed with the ACMP input, which means the
frequency can be monitored by an ACMP module while the ADC module is sampling the voltage. The
ACMP module has two inputs, the first input is the AC voltage after resistor divider and adding the
offset. The second input is the ACMP input that is 0.6 V offset.
Three-phase power meter demo board
KM3x_256 Based Three-Phase Power Meter Hardware Design Reference Manual, Rev. 1, 09/2015
10 Freescale Semiconductor, Inc.
The following figure illustrates the current sampling circuit:
IA_IN-
IA_IN+
INPUT C CURRENT +
INPUT C CURRENT -
INPUT A CURRENT -
INPUT B CURRENT +
INPUT B CURRENT -
INPUT A CURRENT +
IB_IN-
IB_IN+
IC_IN+
IC_IN-
Current Sampling
R8
22
C49
0.047UF
C48
0.047UF
C46
0.047UF
C45
0.047UF
C44
0.047UF
C42
0.047UF
TP3
DNP
TP8
DNP
TP9
DNP
TP12
DNP
TP13
DNP
TP18
DNP
R9
4.7
R18
4.7
R22
4.7
R23
4.7
R34
4.7
R36
4.7
R43
4.7
R49
4.7
R19
22
R21
22
R25
22
R33
22
R37
22
INPUT N CURRENT -
INPUT N CURRENT +
IN_IN+
IN_IN-
C52
0.047UF
C50
0.047UF
TP19
DNP
TP22
DNP
R39
22
R50
22
J5
HDR_1X1
DNP
1
GND GND
GND GND
GND GND
GND GND
AFE_SDADP0
{3}
AFE_SDADM0
{3}
AFE_SDADM1
{3}
AFE_SDADP1
{3}
AFE_SDADM2
{3}
AFE_SDADP2
{3}
AFE_SDADM3
{3}
AFE_SDADP3
{3}
GND
Figure 10. Current sampling circuit
4.6. External memory
The system uses a 512 KB EEPROM (as shown in Figure 12) which is based on an I2C port and 64 MB
SPI flash memory (as shown in Figure 11) for memory extension.
The choice of memory type and memory size are application-dependent. This memory is reserved for
customer application usage. Only low-level read/write logic is implemented in the software.
Three-phase power meter demo board
KM3x_256 Based Three-Phase Power Meter Hardware Design Reference Manual, Rev. 1, 09/2015
Freescale Semiconductor, Inc. 11
R120
10.0K
R124
10.0K
R123
10.0K
R159
10.0K
DNP
3V3D_KM
SPI1_PCS0 {3}
SPI1_SCK
{3}
SPI1_MISO
{3}
SPI1_MOSI
{3}
GND GND
R152
1K
R153
1K
R154
1K
R155
1K
3V3D_KM
64Mb SPI Flash
C82
0.1 UF
C81
1uF
U9
MX25L6406EM2I-12G
CS
1
SO/SIO1
2
WP
3
GND
4
SI/SIO0
5
HOLD
7
SCLK
6
VCC
8
3V3D_KM
Figure 11. External SPI based flash
U10
24LC512
A0
1
A1
2
A2
3
SCL
6
SDA
5
VCC
8
VSS
4
WP
7
3V3D_KM
C90
0.1 UF
512Kb EEPROM
C87
1uF
I2C Slave Address 0x00
I2C1_SCL {3,5}
GND GND
I2C1_SDA{3,5}
Figure 12. External I2C based EEPROM
4.7. Tamper protection
Tamper protection has three features. The tamper detection pin monitors whether the casing is open. The
magnetic sensor detects activity.
In voltage missing mode the system enters into low-power mode, periodically sampling the current to
prevent tampering.
Three-phase power meter demo board
KM3x_256 Based Three-Phase Power Meter Hardware Design Reference Manual, Rev. 1, 09/2015
12 Freescale Semiconductor, Inc.
The following figure shows the tamper detection circuit:
R116
10.0K
R113
10.0K
C70
0.1 UF
C72
0.1 UF
3V3D_KM
SW1
D2F-01FL
1
3
2
Tamper Detection
GNDGND
GND
TAMPER0
{3}
Figure 13. Tamper input circuit
PTB4{3}
C77
0.1 UF
C76
0.1 UF
C75
0.1 UF
C74
0.1 UF
I2C Slave Address 0x0E
C73
1uF
U8
MAG3110
CAP_A
1
VDD
2
NC
3
CAP_R
4
GND1
5
SDA
6
SCL
7
VDDIO
8
INT1
9
GND2
10
3V3D_KM
Maganetic Field Tamper Detection
GND GND GND GND GND GND
I2C1_SCL{3,5}
I2C1_SDA{3,5}
Figure 14. Magnetic Sensor
Three-phase power meter demo board
KM3x_256 Based Three-Phase Power Meter Hardware Design Reference Manual, Rev. 1, 09/2015
Freescale Semiconductor, Inc. 13
4.8. Pulse output
The power meter has an isolated electrical output and a light pulse output for accuracy testing and
calibration, RTC testing and calibration and status indication.
Pulse Output
Q1
BC817-40LT1G
2 3
1
D9
LED RED
AC
Q2
BC817-40LT1G
2 3
1
D10
LED RED
AC
D11
MV5353
AC
Q3
BC817-40LT1G
2 3
1
kWh_LED
PTB2
{3}
kVArh_LED MFUNC_LED
PTB3
{3}
PTC3
{3}
C54
0.1 UF
C55
0.1 UF
R54 330 R55 330 R56 330
R76 10.0K R78 10.0K R79 10.0K
C53
0.1 UF
GND GND
GNDGND
3V3D_KM
GND
GND
3V3D_KM 3V3D_KM
R100
470
R104
470
R108
470
R109
0
R105
0
U5
PS2501-1
1
2 3
4
U6
PS2501-1
1
2 3
4
U7
PS2501-1
1
2 3
4
R101
0
C60
0.1 UF
DNP
DGND
C64
0.1 UF
DNP
C67
0.1 UF
DNP
TP23
DNP
TP25
DNP
TP24
DNP
TP26
DNP
TP27
DNP
C56
0.1 UF C58
0.1 UF
WAR+_KL
C59
0.1 UF
C62
0.1 UF
VAR+_KL
C63
0.1 UF
C66
0.1 UF
MFUN+_KL
3V3D_KM
C65
0.1 UF
WAR-_KL
3V3D_KM
VAR-_KL
R83
47.0K
3V3D_KM
OUTPUT PORT 19
MFUN-_KL
OUTPUT PORT 22
OUTPUT PORT 20
OUTPUT PORT 21
OUTPUT PORT 23
R87
47.0K
GND
GND
R84
47.0K
GND
PTD3
{3}
PTD2
{3}
PTF0
{3}
C57
10UF
Figure 15. Pulse output circui
4.9. RS485 interface
The power meter system has one isolated RS485 port. This port is in half-duplex mode and has multiple
purposes, for instance meter calibration and for billing purposes.
Three-phase power meter demo board
KM3x_256 Based Three-Phase Power Meter Hardware Design Reference Manual, Rev. 1, 09/2015
14 Freescale Semiconductor, Inc.
C106
1uF
DGND
R137
1.0K
R140
1.0K
R145
1.0K
R138
0
R143
0
R146
0
TVS4
DNP
12
C107
0.1 UF
DNP
C102
1uF
R139
330
R142
330
R144
330
TVS5
SA12CA
1 2
RS485 Communication
D
R
U14
ISL3152EIBZ
VCC
8
DI
4
RE
2
RO
1
GND
5
B/Z
7
DE
3
A/Y
6
GND_RS485
RS485_5V
R141
120DNP
t
RT2
30 OHM
TP39
DNP
OUTPUT PORT 27 A2
TP37
DNP
OUTPUT PORT 28 B2
3V3D_KM
C104
100PF
C110
100PF
U15
PS2501-1
1
2 3
4
U12
PS2501-1
1
23
4
U16
PS2501-1
1
2 3
4
3V3D_KM
RS485_5V
GND_RS485
RS485_5V
3V3D_KM
GND_RS485
RS485_5V
C105
0.1 UF
GND
GND
GNDGND
+
C98
100uF
C97
0.1 UF
RS485_5V
GND_RS485
TP33
DNP
TP34
DNP
RS485 GND INPUT PAD
RS485 5V INPUT PAD
PTE0 {3}
UART0_TX {3}
UART0_RX
{3}
GND
Figure 16. Isolated RS485 circuit
4.10. LCD display and backlight
The power meter system has the Chinese standard eight 32-segment LCD modules which display all of
the metering information.
The LCD module has two 15 mA diodes as backlights. The system can switch these on or off according
to the application.
Three-phase power meter demo board
KM3x_256 Based Three-Phase Power Meter Hardware Design Reference Manual, Rev. 1, 09/2015
Freescale Semiconductor, Inc. 15
LCD_P5{3}
LCD_P3{3}
LCD_P7{3}
LCD_P52{3}
LCD_P9{3}
LCD_P13{3}
LCD_P11{3}
LCD_P15{3}
LCD_P19{3}
LCD_P17{3}
LCD_P56{3}
LCD_P21{3}
LCD_P58{3}
LCD_P23{3}
LCD_P44{3}
LCD_P25{3}
LCD_P31{3}
LCD_P27{3}
LCD_P50{3}
LCD_P50_R
LCD_P27_R
LCD_P31_R
LCD_P23_R
LCD_P25_R
LCD_P58_R
LCD_P44_R
LCD_P21_R
LCD_P56_R
LCD_P17_R
LCD_P19_R
LCD_P13_R
LCD_P15_R
LCD_P9_R
LCD_P11_R
LCD_P52_R
LCD_P7_R
LCD_P3_R
LCD_P5_R
LCD_P2_R
Segment LCD & Backlight
C112
10UF
C114 100PF
LCD_P29_R
C115 100PF
LCD_P28_R
C116 100PF
LCD_P26_R
C117 100PF
LCD_P24_R
C118 100PF
LCD_P59_R
LCD_P45_R
C120 100PF
C119 100PF
LCD_P57_R
C121 100PF
LCD_P22_R
C122 100PF
LCD_P55_R
C123 100PF
LCD_P54_R
GND
C124 100PF
C125 100PF
LCD_P18_R
LCD_P20_R
C126 100PF
LCD_P14_R
LCD_P16_R
C127 100PF
LCD_P10_R
LCD_P12_R
C129 100PF
C128 100PF
LCD_P8_R
C131 100PF
C130 100PF
LCD_P53_R
C132 100PF
LCD_P4_R
LCD_P6_R
C133 100PF
GND
TVS3
LXES15AAA1-117
DNP
1 2
Q4
BC817-40LT1G
2 3
1
PTB1 {3}
R106
4.7K
R103
68
Control current=(5-3)V/68R=30mA
R102
0
D12
C02W9652NG-P14.5
A1
K1
A2
K2
GND
R107
47.0K
GND
C134 100PF
LCD_P2_R
C135 100PF
LCD_P5_R
LCD_P3_R
C137 100PF
C136 100PF
LCD_P52_R
C138 100PF
LCD_P11_R
LCD_P9_R
LCD_P7_R
C140 100PF
C139 100PF
C141 100PF
LCD_P15_R
LCD_P13_R
C142 100PF
C143 100PF
LCD_P17_R
GND
C144 100PF
LCD_P21_R
LCD_P19_R
C146 100PF
C145 100PF
LCD_P58_R
LCD_P56_R
C147 100PF
LCD_P23_R
LCD_P44_R
C149 100PF
C148 100PF
LCD_P25_R
C150 100PF
LCD_P27_R
C151 100PF
LCD_P50_R
LCD_P31_R
C153 100PF
C152 100PF
GND
LCD_P29_R
R59 10.0K
R57 10.0K
R62 10.0K
R52 10.0K
R66 10.0K
R64 10.0K
R68 10.0K
R70 10.0K
R72 10.0K
R74 10.0K
R80 10.0K
R81 10.0K
R90 10.0K
R88 10.0K
R85 10.0K
TP44
R92 10.0K
BACKLIGHT 5V VOLTAGE INPUT PAD
R98 10.0K
R96 10.0K
R94 10.0K
R51 10.0K
TP45
R58 10.0K
R60 10.0K
R61 10.0K
R63 10.0K
R67 10.0K
R65 10.0K
R71 10.0K
R69 10.0K
R73 10.0K
R75 10.0K
R77 10.0K
R82 10.0K
R89 10.0K
R86 10.0K
R93 10.0K
R91 10.0K
R99 10.0K
R97 10.0K
R53 10.0K
R95 10.0K
GND
DS1
JY09397F
SEG1
1
SEG2
2
SEG3
3
SEG4
4
SEG5
5
SEG6
6
SEG7
7
SEG8
8
SEG9
9
SEG10
10
SEG11
11
SEG12
12
SEG13
13
SEG14
14
SEG15
15
SEG16
16
SEG17
17
SEG18
18
SEG19
19
SEG20
20
COM8
40
COM7
39
COM6
38
COM5
37
COM4
36
COM3
35
COM2
34
COM1
33
SEG32
32
SEG31
31
SEG30
30
SEG29
29
SEG28
28
SEG27
27
SEG26
26
SEG25
25
SEG24
24
SEG23
23
SEG22
22
SEG21
21
LCD_P29
{3}
LCD_P2{3}
LCD_P26
{3}
LCD_P28
{3}
LCD_P24
{3}
LCD_P59
{3}
LCD_P45
{3}
LCD_P57
{3}
LCD_P22
{3}
+5V_BL
LCD_P55
{3}
LCD_P54
{3}
LCD_P20
{3}
LCD_P18
{3}
LCD_P16
{3}
LCD_P14
{3}
LCD_P12
{3}
LCD_P10
{3}
LCD_P8
{3}
LCD_P6
{3}
LCD_P53
{3}
LCD_P4
{3}
LCD_P24_R
LCD_P26_R
LCD_P28_R
LCD_P22_R
LCD_P57_R
LCD_P59_R
LCD_P45_R
LCD_P18_R
LCD_P20_R
LCD_P54_R
LCD_P55_R
LCD_P10_R
LCD_P12_R
LCD_P14_R
LCD_P16_R
LCD_P4_R
LCD_P6_R
LCD_P53_R
LCD_P8_R
Figure 17. LCD display
4.11. Jumper table
Table 1. System jumper table option
Jumper
Option
Setting
Description
J3
System 3.3V power supply
1-2
System power supply on
J4
External VREF power supply
off
Internal VREF is used by default
Revision history
KM3x_256 Based Three-Phase Power Meter Hardware Design Reference Manual, Rev. 1, 09/2015
16 Freescale Semiconductor, Inc.
5. Summary
This document describes the hardware design features of the three-phase power meter demo boards. For
technical details about the board design and solution implementation see the Kinetis M Series MCUs
documentation section of freescale.com.
6. References
1. Kinetis Series MCUs Taxonomy Page
(http://www.freescale.com/webapp/sps/site/taxonomy.jsp?code=KINETIS_M_SERIES&cof=0&a
m=0)
2. Kinetis Series MCUs Product Summary Page
(http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=KM3x)
7. Revision history
Table 2. Revision history
Revision number
Date
Substantial changes
Rev.0
06/2015
Initial release
Rev.1
09/2015
Modifications to Figure 7, Figure 11, Figure 17, and Table 1
Document Number: DRM164
Rev. 1
09/2015
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