P87C554 NXP Semiconductors, P87C554 Datasheet - Page 52

• 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
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
NUMBYTMST
BACKUP
S1CON
S1ADR
S1DAT
S1STA
HADD
PSW
MRD
IEN0
SRD
MTD
STD
SLA
IPO
P1
CR2
P1.7
EA
ORIGINAL VALUE OF NUMBYTMST
NUMBER OF BYTES AS MASTER
SLA+R/W TO BE TRANSMITTED TO SLA
HIGHER ADDRESS BYTE INTERRUPT ROUTINE
SLAVE TRANSMITTER DATA RAM
SLAVE RECEIVER DATA RAM
MASTER RECEIVER DATA RAM
MASTER TRANSMITTER DATA RAM
SPECIAL FUNCTION REGISTERS
INTERNAL DATA RAM
ENS1
Figure 47. SIO1 Data Memory Map
P1.6
STA
PS1
ES1
2
C, PWM,
ST0
R1
R0
50
SI
AA
0
CR!
0
CR0
SU00978
GC
0
DB
DA
D9
D8
D0
B8
AB
90
80
7F
53
52
51
50
4F
48
40
38
30
19
18
00
P87C554
Product data