80C453 Datasheet, PDF (3/23 Pages) NXP Semiconductors – CMOS single-chip 8-bit microcontrollers

Philips Semiconductors
CMOS single-chip 8-bit microcontrollers
Preliminary specification
80C453/83C453/87C453
BLOCK DIAGRAM
P0.0–P0.7
P2.0–P2.7
P4.0–P4.7
P5.0–5.7
V_CC
V_SS
RAM ADDR
REGISTER
PORT 0
DRIVERS
PORT 2
DRIVERS
PORT 4
DRIVERS
PORT 5
DRIVERS
256 BYTES
RAM
PORT 0
LATCH
PORT 2
LATCH
PORT 4
LATCH
PORT 5
LATCH
8K x 8
EPROM
B
REGISTER
ACC
TMP2
TMP1
STACK
POINTER
ALU
PSW
PCON
PSW
TL1
CSR
SCON TMOD
TH0 TL0
DPH DPL
SBUF IE
TCON
TH1
AUXR
IP
INTERRUPT, SERIAL
PORT AND TIMER BLOCKS
PSEN
ALE/PROG
EAV_PP
RST
TIMING
AND
CONTROL
PD
OSCILLATOR
XTAL1
XTAL2
PORT 1
LATCH
PORT 1
DRIVERS
P1.0–P1.7
PORT 6
LATCH
PORT 6
DRIVERS
P6.0–P6.7
PORT 3
LATCH
PORT 6
CONTROL/STATUS
PORT 3
DRIVERS
IDS ODS BFLAG
AFLAG
P3.0–P3.7
PROGRAM
ADDRESS
REGISTER
BUFFER
PC
INCRE-
MENTER
PROGRAM
COUNTER
DPTR
SU00158
1996 Aug 15
3-313