P87C552 NXP Semiconductors, P87C552 Datasheet - Page 54

• Manufacturer Part Number: P87C552
• Description: The 87C552 Single-Chip 8-Bit Microcontroller is manufactured in anadvanced CMOS process and is a derivative of the 80C51microcontroller family
• Manufacturer: NXP Semiconductors

Philips Semiconductors
0108
010B
010E
0110
0113
010E
00A0
00A3
00A5
00A7
00AA
00AC
0118
011B
011D
2003 Apr 01
80C51 8-bit microcontroller
8K/256 OTP, 8 channel 10 bit A/D, I
capture/compare, high I/O, low voltage (2.7 V to 5.5 V), low power
8551DA
75D8C5
01A0
8551DA
75D8C5
01A0
75D018
7930
7838
855253
D0D0
32
75D018
87DA
01B5
!********************************************************************************************************
!********************************************************************************************************
! MASTER STATE SERVICE ROUTINES
!********************************************************************************************************
! State 08 and State 10 are both for MST/TRX and MST/REC.
! The R/W bit decides whether the next state is within
! MST/TRX mode or within MST/REC mode.
!********************************************************************************************************
!– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
! STATE
! ACTION : SLA+R/W are transmitted, ACK bit is received.
!– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
.sect
.base
!– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
! STATE
!
! ACTION : SLA+R/W are transmitted, ACK bit is received.
!– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
.sect
.base
.sect
.base
INITBASE1:
!********************************************************************************************************
!********************************************************************************************************
! MASTER TRANSMITTER STATE SERVICE ROUTINES
!********************************************************************************************************
!********************************************************************************************************
!– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
! STATE
!
! ACTION : First DATA is transmitted, ACK bit is received.
!– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
.sect
.base
: 08, A, START condition has been transmitted.
mts8
0x108
: 10, A repeated START condition has been
mts10
0x110
ibase1
0xa0
: 18, Previous state was STATE 8 or STATE 10, SLA+W have been transmitted,
mts18
0x118
transmitted.
ACK has been received.
2
C, PWM,
mov
mov
ajmp INITBASE1
mov
mov
ajmp INITBASE1
mov
mov
mov
mov
pop
reti
mov
mov
ajmp CON
S1DAT,SLA
S1CON,#ENS1_NOTSTA_NOTSTO_NOTSI_AA_CR0
S1DAT,SLA
S1CON,#ENS1_NOTSTA_NOTSTO_NOTSI_AA_CR0
psw,#SELRB3
r1,#MTD
r0,#MRD
BACKUP,NUMBYTMST
psw
psw,#SELRB3
S1DAT,@r1
54
! Load SLA+R/W
! clr SI
! Load SLA+R/W
! clr SI
! Save initial value
P87C552
Product data