HMS87C5216 Datasheet, PDF (63/76 Pages) List of Unclassifed Manufacturers – CMOS SINGLE-CHIP 8-BIT MICROCONTROLLER FOR UR(Universal Remocon) & WIRELESS KEYBOARD

HMS87C5216
[ SLEEP MODE ]
Xin
release by interrupt
RESET
SLEEP command
SLEEP Mode
Longer than
2 machine cycle
[ STOP MODE ]
clock
release by interrupt
RESET
STOP Mode
Stable
OSC. time
Program Setting Time by
CKCTLR
Longer than
stable OSC. Time
Figure 15-3 Release Timing of Standby Mode
15.4 RELEASE OPERATION OF STANDBY MODE
After standby mode is released, the operation begins according to
content of related interrupt register just before standby mode start
(Figure 15-4)
(1) Interrupt Enable Flag(I) of PSW = ``0``
Release by only interrupt which interrupt enable flag = ``1``, and
starts to execute from next to standby instruction (SLEEP or
STOP).
(2) Interrupt Enable Flag(I) of PSW = ``1``
Note: When STOP instruction is used, B.I.T should guar-
antee the stabilization oscillation time. Thus, just before en-
tering STOP mode, clock of bit10 (PS10) of prescaler is
selected or peripheral hardware clock control bit (ENPCK)
to ``1``, Therefore the clock necessary for stabilization os-
cillation time should be input into B.I.T. otherwise, standby
mode is released by reset signal. In case of interrupt re-
quest flag and interrupt enable flag are both ``1``, standby
mode is not entered.
Released by only interrupt which each interrupt enable flag =
``1``, and jump to the relevant interrupt service routine.
SEP. 2004 Ver 1.01