
2
4431E–8051–04/06
AT/TS8xC54/8X2
The TS80C54/58X2 has 2 software-selectable modes of reduced activity for further reduction in
power consumption. In the idle mode the CPU is frozen while the timers, the serial port and the
interrupt system are still operating. In the power-down mode the RAM is saved and all other
functions are inoperative.
2.
Block Diagram
PDIL40
PLCC44
PQFP44 F1
VQFP44 1.4
ROM (bytes)
EPROM (bytes)
TS80C54X2
TS80C58X2
16k
32k
0
TS87C54X2
TS87C58X2
0
16k
32k
Timer 0
INT
RAM
256x8
T0
T1
Rx
D
Tx
D
WR
RD
EA/VPP
PSEN
ALE/
XTAL2
XTAL1
EUART
CPU
Timer 1
INT
1
Ctrl
INT
0
(2)
C51
CORE
(2) (2)
Port 0
P0
Port 1 Port 2 Port 3
Parallel I/O Ports
P1
P2
P3
IB-bus
RE
S
E
T
PROG
Watch
Dog
Vs
s
Vc
c
(2)
(1): Alternate function of Port 1
Timer2
T2
E
X
T2
(1)
(2): Alternate function of Port 3
ROM
/EPROM
16/32Kx8