GMS81004 Datasheet, PDF (80/101 Pages) Hynix Semiconductor – 8-BIT SINGLE CHIP MICROCOMPUTERS

Chapter6. Standby Function
6.2 STANDBY MODE RELEASE
6.2.1 STOP Mode Release
Release of STANDBY mode is executed by RESET input and Interrupt signal. Register
value is defined when Reset. When there is a release signal of STOP mode (Interrupt,
RESET input), the instruction execution starts after stabilization oscillation time is set by
value of BTS2~BTS0 and set ENPCK to 1.
Table 6.1. Standby Mode Register
Release Signal
RESET
KSCN (Key input)
INT1 - INT2
STOP
0
0
0
Release Factor
RESET Pin
KSCN
(Key input)
INT 1 pin
INT 2 pin
Table 6.2 Standby Mode Release
Release Method
By RESET Pin = Low level, Standby mode is release and system is initialized
Standby mode is released by Low input of selected pin by Key Scan Input
(SMRR0, SMRR1)
In case of interrupt Mask Enable flag = 0, program executes just after standby
instruction, if flag = 1, enters each interrupt service routine.
When external interrupt (INT1, INT2) enable flag is ¡È1¡È, standby mode is
released at the rising edge of each terminal.
When Standby mode is released at interrupt. Mask Enable flag = 0, program
executes from the next instruction of standby instruction.
When 1, enters each interrupt service routine.
6 -3