P87C654X2 Datasheet, PDF (55/88 Pages) NXP Semiconductors – 80C51 8-bit microcontroller family 16 kB OTP/ROM, 256B RAM, low voltage (2.7 to 5.5 V), low power, high speed (30/33 MHz)

Philips Semiconductors
80C51 8-bit microcontroller family 16 kB OTP/ROM,
256B RAM, low voltage (2.7 to 5.5 V), low power, high speed
(30/33 MHz)
Product data
P83C654X2/P87C654X2
0120
0123
0125
75D8D5
D0D0
32
0128 D55285
012B 75D8D5
012E 01B9
00B0
00B3
00B5
75D018
87DA
75D8C5
00B8
00B9
00BB
09
D0D0
32
0130
0133
0135
75D8D5
D0D0
32
0138
013B
013E
75D8E5
855352
01B9
!– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
! STATE : 20, SLA+W have been transmitted, NOT ACK has been received
! ACTION : Transmit STOP condition.
!– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
.sect
mts20
.base
0x120
mov S1CON,#ENS1_NOTSTA_STO_NOTSI_AA_CR0
! set STO, clr SI
pop psw
reti
!– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
! STATE : 28, DATA of S1DAT have been transmitted, ACK received.
! ACTION : If Transmitted DATA is last DATA then transmit a STOP condition,
!
else transmit next DATA.
!– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
.sect
mts28
.base
0x128
djnz NUMBYTMST,NOTLDAT1
! JMP if NOT last DATA
mov S1CON,#ENS1_NOTSTA_STO_NOTSI_AA_CR0
! clr SI, set AA
ajmp RETmt
.sect
mts28sb
.base
0x0b0
NOTLDAT1:
mov psw,#SELRB3
mov S1DAT,@r1
CON:
mov S1CON,#ENS1_NOTSTA_NOTSTO_NOTSI_AA_CR0
! clr SI, set AA
inc r1
RETmt :
pop psw
reti
!– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
! STATE : 30, DATA of S1DAT have been transmitted, NOT ACK received.
! ACTION : Transmit a STOP condition.
!– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
.sect
mts30
.base
0x130
mov S1CON,#ENS1_NOTSTA_STO_NOTSI_AA_CR0
! set STO, clr SI
pop psw
reti
!– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
! STATE : 38, Arbitration lost in SLA+W or DATA.
! ACTION : Bus is released, not addressed SLV mode is entered.
!
A new START condition is transmitted when the IIC-bus is free again.
!– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
.sect
mts38
.base
0x138
mov S1CON,#ENS1_STA_NOTSTO_NOTSI_AA_CR0
mov NUMBYTMST,BACKUP
ajmp RETmt
2004 Apr 20
55