EM78156EAS EMC [ELAN Microelectronics Corp], EM78156EAS Datasheet - Page 23

• Manufacturer Part Number: EM78156EAS
• Description: 8-Bit Microcontroller with MASK ROM
• Manufacturer: EMC [ELAN Microelectronics Corp]

Product Specification (V1.3) 07.29.2004
(This specification is subject to change without further notice)
Address
0x0B
0x0C
0x0D
0x0E
0x0F
0x10~0x2F
Name
IOCB
IOCC
IOCD
IOCE
IOCF
R10~R2F
**
X: Not used. U: Unknown or don’t care. P: Previous value before reset. t: Check
4.5.2 The Status of RST, T, and P of STATUS Register
A RESET condition is initiated 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 6 are used to check how the processor wakes up.
Table 7 shows the events that may affect the status of T and P.
Table 6
instruction.
To jump address 0x08, or to execute the instruction which is next to the “SLEP”
Bit Name
Power-On
/RESET and WDT
Wake-Up from Pin
Change
Bit Name
Power-On
/RESET and WDT
Wake-Up from Pin
Change
Bit Name
Power-On
/RESET and WDT
Wake-Up from Pin
Change
Bit Name
Power-On
/RESET and WDT
Wake-Up from Pin
Change
Bit Name
Power-On
/RESET and WDT
Wake-Up from Pin
Change
Bit Name
Power-On
/RESET and WDT
Wake-Up from Pin
Change
Reset Type
WDTE
/PD7
/PH7
Bit 7
OD7
U
U
U
U
1
1
P
0
0
P
1
1
P
1
1
X
P
P
1
-
/PD6
/PH6
Bit 6
OD6
EIS
P
P
P
P
U
U
U
U
P
P
1
1
0
0
1
1
0
0
X
-
/PD5
/PH5
Bit 5
OD5
8-Bit Microcontroller with MASK ROM
P
P
P
X
U
U
U
X
U
U
U
U
P
P
1
1
0
0
1
1
-
/PD4
/PH4
ROC
Bit 4
OD4
P
P
P
P
X
U
U
U
U
P
P
1
1
0
0
1
1
0
0
-
Bit 3
/PH3
OD3
X
U
U
U
P
P
X
U
U
U
X
U
U
U
U
P
P
0
0
1
1
-
Bit 2
/PD2
/PH2
EXIE
OD2
P
P
P
X
U
U
U
P
U
P
P
1
1
0
0
1
1
0
0
-
EM78156E
Bit 1
/PD1
/PH1
OD1
ICIE
P
P
P
X
U
U
U
P
U
P
P
1
1
0
0
1
1
0
0
-
TCIE
Bit 0
/PD0
/PH0
OD0
P
P
P
X
U
U
U
P
U
P
P
1
1
0
0
1
1
0
0
-
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