TN8044AH-R0117 datasheet(56/65 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 56 of 65

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Reset

A reset is accomplished by holding the RST pin high for at least two machine cycles (24

oscillator periods) while the oscillator is running. The CPU responds by generating an internal

reset, which is executed during the second cycle in which RST is high.

The internal reset sequence affects all SFRs as shown in Table 52. The internal reset sequence

does not affect the contents of internal RAM.

Table 52. Reset Values Register

Reset value

0000H

ACC

00000000B

PSW

00000000B

00000111B

DPTR

0000H

–P3

11111111B

XXX00000B

0XX00000B

TMOD

00000000B

TCON

00000000B

TH0

00000000B

TL0

00000000B

TH1

00000000B

TL1

00000000B

SMD

00000000B

STS

00000000B

NSNR

00000000B

STAD

XXXXXXXXB

TBS

XXXXXXXXB

TBL

XXXXXXXXB

TCB

XXXXXXXXB

RBS

XXXXXXXXB

RBL

XXXXXXXXB

RFL

XXXXXXXXB

RCB

XXXXXXXXB

DMA CNT

00000000B

FIFO1

00000000B

FIFO2

00000000B

FIFO3

00000000B

SIUST

00000001B

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