EM78156E
8-Bit Microcontroller with MASK ROM
Table 6 The Values of RST, T and P after RESET
Reset Type
T
P
Power on
1
1
/RESET during Operating mode
*P
1
*P
0
/RESET wake-up during SLEEP mode
WDT during Operating mode
0
*P
0
WDT wake-up during SLEEP mode
Wake-Up on pin change during SLEEP mode
0
1
0
*P: Previous status before reset
Table 7 The Status of T and P Being Affected by Events.
Event
Power on
T
1
1
0
1
1
P
1
1
WDTC instruction
WDT time-out
*P
0
SLEP instruction
Wake-Up on pin change during SLEEP mode
0
*P: Previous value before reset
VDD
D
CLK
Q
CLK
Oscillator
CLR
Power-on
Reset
Voltage
Detector
W DTE
W DT Timeout
Setup Time
RESET
W DT
/RESET
Fig. 9 Block Diagram of Controller Reset
4.6 Interrupt
The EM78156E has three falling-edge interrupts listed below:
(1) TCC overflow interrupt
(2) Port 6 Input Status Change Interrupt
(3) External interrupt [(P60, /INT) pin].
Before the Port 6 Input Status Change Interrupt is enabled, reading Port 6 (e.g. "MOV
R6,R6") is necessary. Each pin of Port 6 will have this feature if its status changed.
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Product Specification (V1.3) 07.29.2004
(This specification is subject to change without further notice)
ELAN [ ELAN MICROELECTRONICS CORP ]
