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EM78P447NAM Datasheet(PDF) 22 Page - ELAN Microelectronics Corp

Part # EM78P447NAM
Description  8-BIT MICRO-CONTROLLER
Download  57 Pages
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Manufacturer  EMC [ELAN Microelectronics Corp]
Direct Link  http://www.emc.com.tw
Logo EMC - ELAN Microelectronics Corp

EM78P447NAM Datasheet(HTML) 22 Page - ELAN Microelectronics Corp

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EM78P447N
OTP ROM
Change
** To execute next instruction after the ”SLPC” bit status of IOCE register being on high-to-low transition.
X: Not used. U: Unknown or don’t care. P: Previous value before reset. t: Check Table 5
2. The Status of RST, T, and P of STATUS Register
A RESET condition is initiated by one of 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 5 below) are used to verify the event that triggered the processor
to wake up.
Table 6 shows the events that may affect the status of T and P.
Table 5 The Values of RST, T and P after RESET
Reset Type
T
P
Power on
1
1
/RESET during Operating mode
*P
*P
/RESET wake-up during SLEEP1 mode
1
0
/RESET wake-up during SLEEP2 mode
*P
*P
WDT during Operating mode
0
*P
WDT wake-up during SLEEP1 mode
0
0
WDT wake-up during SLEEP2 mode
0
*P
Wake-Up on pin change during SLEEP2 mode
*P
*P
*P: Previous status before reset
Table 6 The Events that may Affect the T and P Status
Event
T
P
Power on
1
1
WDTC instruction
1
1
WDT time-out
0
*P
SLEP instruction
1
0
Wake-Up on pin change during SLEEP2 mode
*P
*P
*P: Previous value before reset
This specification is subject to change without prior notice.
10.21.2004 (V1.0)
22


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