P87C554 NXP Semiconductors, P87C554 Datasheet - Page 58

• Manufacturer Part Number: P87C554
• Description: The P87C554 Single-Chip 8-Bit Microcontroller is manufactured inan advanced CMOS process and is a derivative of the 80C51microcontroller family
• Manufacturer: NXP Semiconductors

Philips Semiconductors
0140
0143
0148
014B
014D
0150
0153
0155
00C0
00C3
00C6
00C8
00CB
00CC
00CE
0158
015B
015D
2002 Mar 25
80C51 8-bit microcontroller – 12 clock operation
16K/512 OTP/RAM, 8 channel 10-bit A/D, I
capture/compare, high I/O
75D8C5
D0D0
32
75D8D5
D0D0
32
75D018
A6DA
01C0
D55205
75D8C1
8003
75D8C5
08
D0D0
32
75D018
A6DA
80E9
!********************************************************************************************************
!********************************************************************************************************
! MASTER RECEIVER STATE SERVICE ROUTINES
!********************************************************************************************************
!********************************************************************************************************
!– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
! STATE
!
! ACTION : DATA will be received, ACK returned.
!– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
.sect
.base
!– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
! STATE
! ACTION : STOP condition will be generated.
!– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
.sect
.base
STOP:
!– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
! STATE
! ACTION : Read DATA of S1DAT.
!
!– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
.sect
.base
.sect
.base
REC1:
NOTLDAT2:
RETmr:
!– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
! STATE
! ACTION : Read DATA of S1DAT and generate a STOP condition.
!– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
.sect
.base
: 40, Previous state was STATE 08 or STATE 10,
mts40
0x140
: 48, SLA+R have been transmitted, NOT ACK received.
mts48
0x148
: 50, DATA have been received, ACK returned.
mrs50
0x150
mrs50s
0xc0
: 58, DATA have been received, NOT ACK returned.
mrs58
0x158
SLA+R have been transmitted, ACK received.
DATA will be received, if it is last DATA
then NOT ACK will be returned else ACK will be returned.
mov
pop
reti
mov
pop
reti
mov
mov
ajmp REC1
djnz
mov
sjmp RETmr
mov
inc
pop
reti
mov
mov
sjmp STOP
2
C, PWM,
S1CON,#ENS1_NOTSTA_NOTSTO_NOTSI_AA_CR0
psw
S1CON,#ENS1_NOTSTA_STO_NOTSI_AA_CR0
psw
psw,#SELRB3
@r0,S1DAT
NUMBYTMST,NOTLDAT2
S1CON,#ENS1_NOTSTA_NOTSTO_NOTSI_NOTAA_CR0
S1CON,#ENS1_NOTSTA_NOTSTO_NOTSI_AA_CR0
r0
psw
psw,#SELRB3
@R0,S1DAT
56
! clr STA, STO, SI set AA
! set STO, clr SI
! Read received DATA
! clr SI,AA
! clr SI, set AA
P87C554
Product data