P87C554 NXP Semiconductors, P87C554 Datasheet - Page 57

• 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
0120
0123
0125
0128
012B
012E
00B0
00B3
00B5
00B8
00B9
00BB
0130
0133
0135
0138
013B
013E
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
75D8D5
D0D0
32
D55285
75D8D5
01B9
75D018
87DA
75D8C5
09
D0D0
32
75D8D5
D0D0
32
75D8E5
855352
01B9
!– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
! STATE
! ACTION : Transmit STOP condition.
!– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
.sect
.base
!– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
! STATE
! ACTION : If Transmitted DATA is last DATA then transmit a STOP condition,
!
!– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
.sect
.base
.sect
.base
NOTLDAT1:
CON:
RETmt
!– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
! STATE
! ACTION : Transmit a STOP condition.
!– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
.sect
.base
!– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
! STATE
! ACTION : Bus is released, not addressed SLV mode is entered.
!
!– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
.sect
.base
: 20, SLA+W have been transmitted, NOT ACK has been received
mts20
0x120
: 28, DATA of S1DAT have been transmitted, ACK received.
mts28
0x128
mts28sb
0x0b0
: 30, DATA of S1DAT have been transmitted, NOT ACK received.
mts30
0x130
: 38, Arbitration lost in SLA+W or DATA.
mts38
0x138
:
else transmit next DATA.
A new START condition is transmitted when the IIC bus is free again.
mov
pop
reti
djnz
mov
ajmp RETmt
mov
mov
mov
inc
pop
reti
mov
pop
reti
mov
mov
ajmp RETmt
2
C, PWM,
S1CON,#ENS1_NOTSTA_STO_NOTSI_AA_CR0
psw
NUMBYTMST,NOTLDAT1
S1CON,#ENS1_NOTSTA_STO_NOTSI_AA_CR0
psw,#SELRB3
S1DAT,@r1
S1CON,#ENS1_NOTSTA_NOTSTO_NOTSI_AA_CR0
r1
psw
S1CON,#ENS1_NOTSTA_STO_NOTSI_AA_CR0
psw
S1CON,#ENS1_STA_NOTSTO_NOTSI_AA_CR0
NUMBYTMST,BACKUP
55
! set STO, clr SI
! JMP if NOT last DATA
! clr SI, set AA
! clr SI, set AA
! set STO, clr SI
P87C554
Product data