GMS81C1404 Datasheet, PDF (70/93 Pages) Hynix Semiconductor – 8-BIT SINGLE-CHIP MICROCONTROLLERS

GMS81C1404/GMS81C1408
Oscillator
(X_IN pin)
Internal
RC Clock
Internal
Clock
External
Interrupt
(or WDT Interrupt)
STOP Instruction Execution
BIT
Counter
N-2 N-1 N N+1
N+2
Normal Operation
STOP Mode
Clear Basic Interval Timer
00 01
FE FF 00 00
Stabilizing Time
t_ST > 20mS
Normal Operation
Figure 19-4 STOP Mode Releasing by External Interrupt or WDT Interrupt(using RCWDT)
Oscillator
(X_IN pin)
Internal
RC Clock
Internal
Clock
RESET
RESET by WDT
Internal
RESET
STOP Mode
STOP Instruction Execution
Time can not be control by software
Stabilizing Time
t_ST = 64mS @4MHz
Figure 19-5 STOP Mode Releasing by RESET(using RCWDT)
19.3 Wake-up Timer Mode
In the Wake-up Timer mode, the on-chip oscillator is not
stopped. Except the Prescaler(only 2048 devided ratio),
Timer0 and Timer2, all functions are stopped, but the on-
chip RAM and Control registers are held. The port pins out
the values held by their respective port data register, port
direction registers.
The Wake-up Timer mode is activated by execution of
STOP instruction after setting the bit WAKEUP of
CKCTLR to “1”. (This register should be written by
byte operation. If this register is set by bit manipulation
instruction, for example “set1” or “clr1” instruction, it
may be undesired operation)
68
June. 2001 Ver 1.2