p87c453ebaa NXP Semiconductors, p87c453ebaa Datasheet - Page 3

• Manufacturer Part Number: p87c453ebaa
• Description: 80c51 8-bit Microcontroller Family 8k/256 Otp/rom, Expanded I/o
• Manufacturer: NXP Semiconductors

Philips Semiconductors
BLOCK DIAGRAM
1998 Apr 23
ALE/PROG
80C51 8-bit microcontroller family
8K/256 OTP/ROM, expanded I/O
EAV
PSEN
RST
PP
V
V
CC
SS
XTAL1
CONTROL
TIMING
REGISTER
OSCILLATOR
AND
RAM ADDR
REGISTER
B
PD
XTAL2
256 BYTES
RAM
DRIVERS
P1.0–P1.7
ACC
PORT 1
PORT 1
LATCH
TMP2
PSW
DRIVERS
P0.0–P0.7
PORT 0
PORT 0
LATCH
ALU
DRIVERS
P6.0–P6.7
PORT 6
PORT 6
LATCH
P2.0–P2.7
DRIVERS
PORT 2
TMP1
PORT 2
LATCH
3
PCON
PSW
CSR
TL1
PORT AND TIMER BLOCKS
CONTROL/STATUS
IDS ODS
INTERRUPT, SERIAL
P4.0–P4.7
DRIVERS
PORT 4
SCON TMOD
SBUF
PORT 6
PORT 4
TH0
DPH
LATCH
AFLAG
DPL
TL0
BFLAG
IE
POINTER
STACK
P5.0–5.7
DRIVERS
PORT 5
TCON
AUXR
PORT 5
LATCH
TH1
IP
DRIVERS
P3.0–P3.7
PORT 3
PORT 3
LATCH
EPROM
8K x 8
83C453/87C453
Preliminary specification
PROGRAM
PROGRAM
REGISTER
COUNTER
ADDRESS
MENTER
INCRE-
BUFFER
DPTR
PC
SU00158