82C52 Datasheet, PDF (2/20 Pages) Intersil Corporation – CMOS Serial Controller Interface

Pinouts
82C52 (PDIP, CERDIP)
TOP VIEW
RD 1
WR 2
D0 3
D1 4
D2 5
D3 6
D4 7
D5 8
D6 9
D7 10
A0 11
A1 12
IX 13
OX 14
28 CSO
27 VCC
26 DR
25 SDI
24 INTR
23 RST
22 TBRE
21 CO
20 RTS
19 DTR
18 DSR
17 CTS
16 GND
15 SDO
Block Diagram
D0-D7
3 - 10
RD
1
WR
2
A0
11
A1
12
CSO
28
IX
13
OX
14
CO
21
RST
23
24
INTR
DATA
BUS
BUFFER
READ/WRITE
CONTROL
LOGIC
PROGRAM-
MABLE
BOUD RATE
GENERATOR
CONTROL
LOGIC
82C52
82C52 (PLCC, CLCC)
TOP VIEW
4 3 2 1 28 27 26
D2 5
25 SDI
D3 6
24 INTR
D4 7
23 RST
D5 8
D6 9
22 _TBRE
21 CO
D7 10
20 RTS
A0 11
19 DTR
12 13 14 15 16 17 18
UART
CONTROL AND
STATUS
REGISTERS
TRANSMITTER
BUFFER
REGISTER
RECEIVER
BUFFER
REGISTER
MODEM
CONTROL AND
STATUS
REGISTERS
22
TBRE
26
DR
TRANSMITTER
REGISTER
P
S
15
SDO
RECEIVER
REGISTER
P
S
25
SDI
18
DSR
17
CTS
19
DTR
20
RTS
2
FN2950.3
April 26, 2006