TS87C52X2 ATMEL Corporation, TS87C52X2 Datasheet - Page 27

• Manufacturer Part Number: TS87C52X2
• Description: 8-bit Microcontroller 8 Kbytes Otp
• Manufacturer: ATMEL Corporation

4184E–8051–09/02
Exit from power-down by reset redefines all the SFRs, exit from power-down by external
interrupt does no affect the SFRs.
Exit from power-down by either reset or external interrupt does not affect the internal
RAM content.
Note:
Table 15. The State of Ports During Idle and Power-down Modes
Note:
Mode
Power
Power
Down
Down
Idle
Idle
If idle mode is activated with power-down mode (IDL and PD bits set), the exit sequence
is unchanged, when execution is vectored to interrupt, PD and IDL bits are cleared and
idle mode is not entered.
1. Port 0 can force a "zero" level. A "one" will leave port floating.
Program
Memory
External
External
Internal
Internal
ALE
1
1
0
0
PSEN
1
1
0
0
PORT0
Floating
Floating
Data
Data
Port
Port
(1)
(1)
Port Data
Port Data
Port Data
Port Data
PORT1
TS8xCx2X2
Port Data
Port Data
Port Data
PORT2
Address
Port Data
Port Data
Port Data
Port Data
PORT3
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