AT89C5131-PLTIL ATMEL Corporation, AT89C5131-PLTIL Datasheet - Page 147
AT89C5131-PLTIL
Manufacturer Part Number
AT89C5131-PLTIL
Description
8-bit Flash Microcontroller with Full Speed USB Device
Manufacturer
ATMEL Corporation
Datasheet
1.AT89C5131-PLTIL.pdf
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Figure 69. Power-down Exit Waveform
4136B–USB–09/03
or
XTALB
XTALA
INT0
INT1
Active Phase
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:
This table shows the state of ports during idle and power-down modes.
Table 105. State of Ports
Note:
Power-down
Power-down
Mode
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 0 level. A “one” will leave port floating.
Power-down Phase
Program
Memory
External
External
Internal
Internal
ALE
1
1
0
0
Oscillator restart Phase
PSEN
1
1
0
0
PORT0
Floating
Floating
Data
Data
Port
Port
(1)
(1)
PORT1
Data
Data
Data
Data
Port
Port
Port
Port
Active Phase
Port Data
Port Data
Port Data
PORT2
Address
AT89C5131
Port Data
Port Data
Port Data
Port Data
PORT3
PORTI2
Data
Data
Data
Data
Port
Port
Port
Port
147
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