NXP S12ZVL User guide

External Use

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Getting started with S12ZVL32

S12 MagniV

Training Labs

A u g . 0 3 . 2 0 1 5

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External Use 1

Agenda.

• Low Power Hands-On Exercise

• Description

• Low Power Capabilities

• Flow Chart

• Adjust wake-up time

• PWM Hands-On Exercise

• Description

• Flow Chart

• Plot of signals

• SPI Hands-On Exercise

• Description

• Flow Chart

• Connections/ Results

• EVDD Hands-On Exercise

• Description

• Flow Chart

• Connections

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External Use 2

Low Power Hands-on Exercise

S12ZVL_ Training

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External Use 3

Low Power Hands-on Exercise

Purpose and description:

Demonstrate the S12ZVL low power capabilities, In this Project the MCU is in

stope mode mode but is woken-up by an autonomous periodical interrupt.

In each interrupt led PP5 will toggle.

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External Use 4

S12ZVL low power functionality

• Apart from Run mode, the following table summarizes the low

power capabilities.

*tlock: (150 +256/fREF)us

Operating

mode

Current

consumption

(

typ)

Active

functionality

Wake up

sources

Wake

up

time

Wait

~26mA

*ADC

*Timers

*PLL

*SCI

*I2C

*Timers

*KWI

*PIM

*SCI

tlock

Stop

~23uA

*ACLK

*KWI

*API

*XIRQ

*IRQ

23us+tlock

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External Use 5

Low Power Hands-on Exercise

1. Create a new Project in CodeWarrior

2. Add the Low Power code

3. Download/Debug the code

4. Modify the wake-up frequency

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External Use 6

Low Power Hands-on exercise

Create a new project in CodeWarrior

1. File -> New -> Bareboard Project

2. Name the project. Click next

3. Select device: S12Z -> S12ZVL Family -> MC9S12ZVL32

4. Debug connection: Select “Open Source BDM”

5. Build options are left as default, click next

6. Rapid is not used, click Finish

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External Use 7

Low Power Hands-on exercise

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External Use 8

Low Power Hands-on exercise

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External Use 9

Low Power Hands-on exercise

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External Use 10

Low Power Hands-on exercise

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External Use 11

Low Power Hands-on exercise

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External Use 12

Low Power Hands-on exercise

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External Use 13

Low Power Hands-on exercise

Add the Low Power code

1. Open “S12ZVL_Training/Labs/S12VL_Training_LP”

2. Open “Sources/main.c”

3. Copy all the code

4. Go back to CodeWarrior

5. Open “main.c”

6. Replace all the code

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External Use 14

Low Power Hands-on exercise

Flow Chart

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External Use 15

Low Power Hands-on exercise

Download / debug the code and run it

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External Use 16

Low Power Hands-on exercise

Verify Green led is blinking

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External Use 17

Low Power Hands-on exercise

Modify wake-up frequency changing the value on CPMUAIRH

and CPMUAIRH register

How to adjust your wake up time.

Desired wake

up time

CPMUAIRH

CPMUAIRL

100ms

0x02 0x7C

500ms

0x0C 0x6D

1s

0x18 0xDA

5s

0x7C 0x45

* Assuming autonomous internal clock of 25.4Khz

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External Use 18

PWM Hands-on Exercise

S12ZVL_ Training

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External Use 19

PWM Hands-on Exercise

Purpose and Description:

• In this project you will setup the PWM module. Configuring time

sources, prescalers and duty cycles for the different pins of port P.

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NXP S12ZVL User guide

NXP S12ZVL User guide

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