80C554 datasheet(54/76 Pages) PHILIPS

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Philips Semiconductors

Preliminary specification

80C554/83C554/87C554

80C51 8-bit microcontroller – 6 clock operation

16K/512 OTP/ROM/ROMless, 7 channel 10 bit A/D, I2C, PWM,

capture/compare, high I/O, 64L LQFP

2000 Nov 10

!********************************************************************************************************

! INITIALIZATION ROUTINE

! Example to initialize IIC Interface as slave receiver or slave transmitter and

! start a MASTER TRANSMIT or a MASTER RECEIVE function. 4 bytes will be transmitted or received.

!********************************************************************************************************

.sect

strt

.base

0x00

0000

4100

ajmp INIT

! RESET

.sect

initial

.base

0x200

0200

75DB31

INIT:

mov

S1ADR,#OWNSLA

! Load own SLA + enable

! general call recognition

0203

D296

setb

P1(6)

! P1.6 High level.

0205

D297

setb

P1(7)

! P1.7 High level.

0207

755001

mov

HADD,#PAG1

020A

43A8A0

orl

IEN0,#ENSI01

! Enable SI01 interrupt

020D

C2BD

clr

SI01HP

! SI01 interrupt low priority

020F

75D8C5

mov

S1CON, #ENS1_NOTSTA_NOTSTO_NOTSI_AA_CR0

! Initialize SLV funct.

!********************************************************************************************************

!– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –

! START MASTER TRANSMIT FUNCTION

!– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –

0212

755204

mov

NUMBYTMST,#0x4

! Transmit 4 bytes.

0215

7551C0

mov

SLA,#SLAW

! SLA+W, Transmit funct.

0218

D2DD

setb

STA

! set STA in S1CON

!– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –

! START MASTER RECEIVE FUNCTION

!– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –

021A

755204

mov

NUMBYTMST,#0x4

! Receive 4 bytes.

021D

7551C1

mov

SLA,#SLAR

! SLA+R, Receive funct.

0220

D2DD

setb

STA

! set STA in S1CON

!********************************************************************************************************

! SI01 INTERRUPT ROUTINE

!********************************************************************************************************

.sect

intvec

! SI01 interrupt vector

.base

0x00

! S1STA and HADD are pushed onto the stack.

! They serve as return address for the RET instruction.

! The RET instruction sets the Program Counter to address HADD,

! S1STA and jumps to the right subroutine.

002B

C0D0

push psw

! save psw

002D

C0D9

push S1STA

002F

C050

push HADD

0031

ret

! JMP to address HADD,S1STA.

!– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –

! STATE

: 00, Bus error.

! ACTION : Enter not addressed SLV mode and release bus. STO reset.

!– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –

.sect

st0

.base

0x100

0100

75D8D5

mov

S1CON,#ENS1_NOTSTA_STO_NOTSI_AA_CR0 ! clr SI

! set STO,AA

0103

D0D0

pop

psw

0105

reti

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