ST92F250CV2 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST92F250CV2

8/16-bit single voltage Flash MCU family with RAM, E³ TM (emulated EEPROM), CAN 2.0B and J1850 BLPD

STMicroelectronics 

Device architecture

ST92F124xx/ST92F150Cxx/ST92F150JDV1/ST92F250CV2

Register Group: E (System)

Reset Value: xxxx xx00 (xxh)

7

0

RG4

RG3

RG2

RG1

RG0

RPS

0

0

Bits 7:3 = RG[4:0]: Register Group number.

These bits contain the number (in the range 0 to 31) of the register block specified in the

srp0 or srp instructions. In single 16-register mode the number indicates the lower of the

two 8-register blocks to which the 16 working registers are to be mapped, while in twin 8-

register mode it indicates the 8-register block to which r0 to r7 are to be mapped.

Bit 2 = RPS: Register Pointer Selector.

This bit is set by the instructions srp0 and srp1 to indicate that the twin register pointing

mode is selected. The bit is reset by the srp instruction to indicate that the single register

pointing mode is selected.

0: Single register pointing mode

1: Twin register pointing mode

Bits 1:0: Reserved. Forced by hardware to zero.

POINTER 1 REGISTER (RP1)

R233 - Read/Write

Register Group: E (System)

Reset Value: xxxx xx00 (xxh)

7

0

RG4

RG3

RG2

RG1

RG0

RPS

0

0

This register is only used in the twin register pointing mode. When using the single register

pointing mode, or when using only one of the twin register groups, the RP1 register must be

considered as RESERVED and may NOT be used as a general purpose register.

Bits 7:3 = RG[4:0]: Register Group number. These bits contain the number (in the range 0

to 31) of the 8-register block specified in the srp1 instruction, to which r8 to r15 are to be

mapped.

Bit 2 = RPS: Register Pointer Selector.

This bit is set by the srp0 and srp1 instructions to indicate that the twin register pointing

mode is selected. The bit is reset by the srp instruction to indicate that the single register

pointing mode is selected.

0: Single register pointing mode

1: Twin register pointing mode

Bits 1:0: Reserved. Forced by hardware to zero.

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Doc ID 8848 Rev 7

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