ST92F124 datasheet(227/429 Pages) STMICROELECTRONICS

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MULTIPROTOCOL SERIAL COMMUNICATIONS INTERFACE (SCI-M)

MULTIPROTOCOL SERIAL COMMUNICATIONS INTERFACE (Cont’d)

RECEIVER DMA COUNTER POINTER (RDCPR)

R240 - Read/Write

Reset value: undefined

Bit 7:1 = RC[7:1]: Receiver DMA Counter Pointer.

These bits contain the address of the receiver

DMA transaction counter in the Register File.

Bit 0 = RR/M: Receiver Register File/Memory Se-

lector.

0: Select Memory space as destination.

1: Select the Register File as destination.

RECEIVER DMA ADDRESS POINTER (RDAPR)

R241 - Read/Write

Reset value: undefined

Bit 7:1 = RA[7:1]: Receiver DMA Address Pointer.

These bits contain the address of the pointer (in

the Register File) of the receiver DMA data source.

Bit 0 = RPS: Receiver DMA Memory Pointer Se-

lector.

This bit is only significant if memory has been se-

lected for DMA transfers (RR/M = 0 in the RDCPR

0: Select ISR register for receiver DMA transfers

address extension.

1: Select DMASR register for receiver DMA trans-

fers address extension.

TRANSMITTER DMA COUNTER POINTER

(TDCPR)

R242 - Read/Write

Reset value: undefined

Bit 7:1 = TC[7:1]: Transmitter DMA Counter Point-

er.

These bits contain the address of the transmitter

DMA transaction counter in the Register File.

Bit 0 = TR/M: Transmitter Register File/Memory

Selector.

0: Select Memory space as source.

1: Select the Register File as source.

TRANSMITTER DMA ADDRESS POINTER

(TDAPR)

R243 - Read/Write

Reset value: undefined

Bit 7:1 = TA[7:1]: Transmitter DMA Address Point-

er.

These bits contain the address of the pointer (in

the Register File) of the transmitter DMA data

source.

Bit 0 = TPS: Transmitter DMA Memory Pointer Se-

lector.

This bit is only significant if memory has been se-

lected for DMA transfers (TR/M = 0 in the TDCPR

0: Select ISR register for transmitter DMA transfers

address extension.

1: Select DMASR register for transmitter DMA

transfers address extension.

RC7

RC6

RC5

RC4

RC3

RC2

RC1

RR/M

RA7

RA6

RA5

RA4

RA3

RA2

RA1

RPS

TC7

TC6

TC5

TC4

TC3

TC2

TC1

TR/M

TA7

TA6

TA5

TA4

TA3

TA2

TA1

TPS

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