P8044AH-R0117 datasheet(23/65 Pages) INNOVASIC

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IA8044/IA8344

Data Sheet

SDLC Communications Controller

March 30, 2010

IA211010112-04

http://www.Innovasic.com

UNCONTROLLED WHEN PRINTED OR COPIED

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Page 23 of 65

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4.4

Special Function Registers

Table 9 presents the SFRs of the IA8044 and IA8344.

Table 9. Special Function Registers

Symbol

Byte Address (Hex)

Bit Addresses (Hex)

(MSB

–LSB)

ACC

Accumulator

E0h

E7h

–E0h

B register

F0h

F7h

–F0h

PSW

Program Status Word

D0h

D7h

–D0h

Stack Pointer

81h

–

DPH

Data Pointer High Byte

82h

–

DPL

Data Pointer Low Byte

83h

–

Port 0

80h

87h

–80h

Port 1

90h

97h

–90h

Port 2

A0h

A7h

–A0h

Port 3

B0h

B7h

–B0h

Interrupt Priority

B8h

BCh

–B8h

Interrupt Enable

A8h

AFh,ACh

–A8h

TMOD

Timer/Counter Mode

89h

–

TCON

Timer/Counter Control

88h

8Fh

–88h

TH0

Timer/Counter 0 high byte

8Ch

–

TL0

Timer/Counter 0 low byte

8Ah

–

TH1

Timer/Counter 1 high byte

8Dh

–

TL1

Timer/Counter 1 low byte

8Bh

–

SMD

Serial Mode

C9h

–

STS

SIU Status and Command

C8h

CFh

–C8h

NSNR

SIU Send/Receive Count

D8h

DFh

–D8h

STAD

SIU Station Address

CEh

–

TBS

Transmit Buffer Start Address

DCh

–

TBL

Transmit Buffer Length

DBh

–

TCB

Transmit Control Byte

DAh

–

RBS

Receive Buffer Start Address

CCh

–

RBL

Receive Buffer Length

CBh

–

RFL

Receive Field Length

CDh

–

RCB

Receive Control Byte

CAh

–

DMA CNT

DMA Count

CFh

–

FIFO

FIFO contents (3 bytes)

DF,DE,DDh

–

SIUST

SIU State Counter

D9h

–

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