
2
TS8xCx2X2
4184I–8051–02/08
Table 1. Memory Size
Block Diagram
Notes: 1. Alternate function of Port 1
2. Alternate function of Port 3
ROM (bytes)
EPROM (bytes)
TOTAL RAM (bytes)
TS80C32X2
0
256
TS80C52X2
8k
0
256
TS87C52X2
0
8k
256
Timer 0
INT
RAM
256x8
T
0
T
1
R
x
D
T
x
D
WR
RD
EA/VPP
PSEN
ALE/
XTAL2
XTAL1
EUART
CPU
Timer 1
IN
T
1
Ctrl
IN
T
0
(2)
C51
CORE
(2) (2)
Port 0
P
0
Port 1 Port 2 Port 3
Parallel I/O Ports & Ext. Bus
P
1
P
2
P
3
IB-bus
R
E
S
E
T
PROG
V
s
V
c
(3)
Timer2
T
2
E
X
T
2
(1)
ROM
/EPROM
8Kx8