EM78P156E Ver la hoja de datos (PDF) - ELAN Microelectronics
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EM78P156E Datasheet PDF : 28 Pages
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EM78P156E
Address
0x0B
0x0C
0x0D
0x0E
0x0F
0x10
~ 0x3F
Name
IOCB
IOCC
IOCD
IOCE
IOCF
R10~R3F
Reset Type
Bit Name
Power-on
/RESET and WDT
Wake-up from Pin Changed
Bit Name
Power-on
/RESET and WDT
Wake-up from Pin Changed
Bit Name
Power-on
/RESET and WDT
Wake-up from Pin Changed
Bit Name
Power-on
/RESET and WDT
Wake-up from Pin Changed
Bit Name
Power-on
/RESET and WDT
Wake-up from Pin Changed
Bit Name
Power-on
/RESET and WDT
Wake-up from Pin Changed
Bit 7
/PD7
1
1
P
OD7
0
0
P
/PH7
1
1
P
WDTC
1
1
1
X
U
U
U
-
U
P
P
Bit 6
/PD6
1
1
P
OD6
0
0
P
/PH6
1
1
P
EIS
0
0
P
X
U
U
U
-
U
P
P
Bit 5
/PD5
1
1
P
OD5
0
0
P
/PH5
1
1
P
X
U
U
U
X
U
U
U
-
U
P
P
Bit 4
/PD4
1
1
P
OD4
0
0
P
/PH4
1
1
P
ROC
0
0
P
X
U
U
U
-
U
P
P
Bit 3 Bit 2 Bit 1 Bit 0
X /PD2 /PD1 /PD0
U11 1
U11 1
UP P P
OD3 OD2 OD1 OD0
0000
0000
PPPP
/PH3 /PH2 /PH1 /PH0
1111
1111
PPPP
XXXX
UUUU
UUUU
UUUU
X EXIE ICIE TCIE
U00 0
U00 0
UP P P
----
UUUU
PPPP
PPPP
** To jump address 0x08, or to execute the instruction which is next to the “SLEP” instruction.
X: not used. U: unknown or don’t care.
P: previous value before reset.
t: check Table 4
2. The status of T and P of STATUS register
A RESET condition can be caused by the following events:
1. a power-on condition,
2. a high-low-high pulse on /RESET pin, and
3. Watchdog Timer time-out.
The values of T and P, listed in Table 4 can be used to check how the processor wakes up. Table 5 shows the events which
may affect the status of T and P .
Table 4 The values of T and P after RESET
Reset Type
Power-on
/RESET during operating mode
/RESET wake-up during SLEEP mode
WDT during operating mode
WDT wake-up during SLEEP mode
Wake-up on pin changed during SLEEP mode
T
P
1
1
*P
*P
1
0
0
P
0
0
1
0
*P: Previous status before reset
* This specification is subject to be changed without notice. 8.11.1999
B3-15
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