ST AN1335 APPLICATION NOTE

AN1335

APPLICATION NOTE

Using the ST10F280

By André ROGER

1 - INTRODUCTION

ST10F280 is a new member of ST10 family. This device has been specifically designed for application based on C167 and that now requires signal processing: a timer has been added for signal sampling (automatic triggering of ADC requests on a pre-defined time period).

This application note is showing how to design an application using ST10F280. The following aspects are covered and detailed :

–Emulation,

–Porting from ST10F269,

–Peripheral configuration.

April 2001

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AN1335 - APPLICATION NOTE

TABLE CONTENTS		PAGE
1	INTRODUCTION ........................................................................................................	1
2	ST10F280 NEW FEATURES FULLY SUPPORTED BY EMULATORS ...................	3
2.1	XPORT9 ......................................................................................................................	3
2.2	XPORT10 ....................................................................................................................	3
2.3	XTIMER .......................................................................................................................	3
2.4	XPWM .........................................................................................................................	3

3	ST10F280 REGISTERS NOT SUPPORTED BY THE EMULATOR .........................	3
3.1	SOFTWARE ADVICE FOR NOT IMPLEMENTED REGISTERS ................................	3
3.2	PORT4 REGISTERS ...................................................................................................	3
3.3	PORT5 REGISTERS ...................................................................................................	4
3.4	POCON REGISTERS..................................................................................................	4
3.5	XPERCON REGISTER ...............................................................................................	4
3.6	EXISEL REGISTER.....................................................................................................	4

4	ST10F280 REGISTERS PARTLY SUPPORTED BY THE EMULATOR ...................	5
4.1	PICON REGISTER......................................................................................................	5
4.2	WDTCON REGISTER ................................................................................................	5
5	ST10F280 PERIPHERALS NOT SUPPORTED BY THE EMULATORS ..................	5
5.1	ST10F280 FLASH .......................................................................................................	5
5.2	BOOSTRAP.................................................................................................................	5
6	DC/AC PARAMETER DIFFERENCES ......................................................................	6
7	PORTING AN APPLICATION FROM ST10F269 TO ST10F280 ..............................	6
7.1	DIFFERENCES IN PERIPHERAL SET.......................................................................	6
7.2	DIFFERENCES IN MEMORY MAPPING ....................................................................	6
7.2.1	Differences on the RAM .............................................................................................	6
7.2.1.1	Differences in Flash.....................................................................................................	6
8	ST10F280 PERIPHERAL CONFIGURATION ...........................................................	6
8.1	XPORT9 ......................................................................................................................	6
8.2	XPORT10 ....................................................................................................................	6
8.2.1	ADC Software Driver Considerations .........................................................................	7
8.3	XTIMER .......................................................................................................................	7
8.3.1	Manual Injection Conversion Request ........................................................................	7
8.3.2	Proposal of ADC Driver When Converting All Channels Regularly ............................	7
8.3.3	Example ......................................................................................................................	7
8.3.3.1	Software Configuration ................................................................................................	8
8.3.3.2	Hardware Configuration...............................................................................................	8
8.4	XPWM .........................................................................................................................	8
8.4.1	Bit Addressability and Interrupt Requests ..................................................................	9
8.4.2	XPWM Software Advice Summary .............................................................................	9
9	APPLICATION NOTE VERSION INFORMATION .....................................................	9
9.1	REVISION OF 29TH OF APRIL 2001 .........................................................................	9
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2 - ST10F280 NEW FEATURES FULLY SUPPORTED BY EMULATORS

This paragraph describes the features that are fully supported by the ST10F280 emulator.

2.1 - XPort9

XPort9 and its associated features can be fully supported by the emulators.

Note: XPort9 register9 is not addressable as a standard ST10 port register; care should be taken when accessing the Xport9 registers. For simplicity, 2 registers have been added : one to set and another one to clear specific pins.

2.2 - XPort10

Xport10 and the associated 16 new ADC analog channels can be fully supported by the emulator.

XP10DISDIS, is also fully supported (this is not the case for P5DIDIS; see Section 3.3 - Port5 Registers).

2.3 - XTimer

Xtimer, which allows to activate an external pin, which in the end can trigger an ADC conversion request can also be fully supported by the emulator.

2.4 - XPWM

XPWM, and its associated features are fully supported by the emulators. Alltough those PWM channels are identical to the one of other ST10 variants, users are advised to check the chapter describing F280 peripheral configuration.

3 - ST10F280 REGISTERS NOT SUPPORTED BY THE EMULATOR

This paragraph describes all the issues caused by ST10F280 registers that are not implemented in the emulator.

3.1 - Software Advice for not Implemented Registers

When a ST10F280 register is not implemented in the bond-out :

–Avoid unnecessary read and check of the value in this register,

–If read accesses in user mode are necessary, use the CPU IDCHIP register to detect which CPU is running the code. Then, allow the check on this register only for the ST10F280. If running from the bond-out, use a pre-defined, but non initialised, memory variable to set which configuration you want during emulation.

3.2 - Port4 Registers

Description

ST10F280 register ODP4 is not implemented on the ST10 bond-out. This register allows setting the pin that handles CAN-TX alternate functions in push-pull or in open-drain.

Software Impact

Application software only shall write to this register.

Hardware Impact

No hardware impact if ST advices are implemented by the emulator party (check with your emulator supplier).

ST10F280 Emulation Impact

No impact if ST advices are implemented and if the content of the register is fixed at initialisation (ie : never changed during run time) and if the emulator is properly configured.

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