em78p156n ELAN Microelectronics Corp, em78p156n Datasheet - Page 24

• Manufacturer Part Number: em78p156n
• Description: 8-bit Micro-controller
• Manufacturer: ELAN Microelectronics Corp

The values of T and P, listed in Table 4 are used to check how the processor wakes up. Table 5 shows the
events that may affect the status of T and P.
This specification is subject to change without prior notice.
Table 6 The Values of RST, T and P after RESET
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 change during SLEEP mode
*P: Previous status before reset
Table 7 The Status of T and P Being Affected by Events.
Power on
WDTC instruction
WDT time-out
SLEP instruction
Wake-Up on pin change during SLEEP mode
*P: Previous value before reset
1. A power-on condition,
2. A high-low-high pulse on /RESET pin, and
3. Watchdog timer time-out.
WDTE
Power-on
Voltage
Detector
Reset
/RESET
Reset Type
Event
Oscillator
Fig. 9 Block Diagram of Controller Reset
WDT
WDT Timeout
24
VDD
D
CLK
CLR
*P
T
1
1
0
0
1
T
1
1
0
1
1
Q
Setup Time
*P
*P
*P
P
P
1
0
0
0
1
1
0
0
RESET
EM78P156N
07.29.2004 (V1.2)
OTP ROM
CLK