TS80C52X2
Table 14. The state of ports during idle and power-down modes
Program
Memory
Mode
ALE
PSEN
PORT0
PORT1
PORT2
PORT3
Idle
Internal
External
Internal
External
1
1
0
0
1
1
0
0
Port Data*
Floating
Port Data
Port Data
Port Data
Port Data
Port Data
Address
Port Data
Port Data
Port Data
Port Data
Idle
Power Down
Power Down
Port Data*
Floating
Port Data
Port Data
* Port 0 can force a "zero" level. A "one" will leave port floating.
Rev. B - Jan. 25, 1999
29
Preliminary