TMP91C824
91C824-34
(Setting Example)
The Stop mode is entered when the low frequency operates, and high frequency operates after releasing
due to NMI.
Address
SYSCR0
EQU
00E0H
SYSCR1
EQU
00E1H
SYSCR2
EQU
00E2H
8FFDH
LD
(SYSCR1), 08H
; f
SYS
= fs/2
9000H
LD
(SYSCR2), X
−
1001X1B
; Sets Warming Up Time to 2
14
/f
OSCH
9002H
LD
(SYSCR0), 011000
−
−
B
; Operates High Frequency after released.
−
: no change
9005H
HALT
NMI
9006H
LD
XX, XX
RETI
Clears and starts hit
warm-up timer
(high-frequency)
end
NMI Interrupt Routine
Note: When different modes are used before and after STOP mode as the above mentioned , there is possible
to release the HALT mode without changing the operation mode by acceptance of the halt release
interrupt request during execution of “HALT ” instruction (during 8 state).In the system which accepts
the interrupts during execution ”HALT ” instruction, set the same operation mode before and after the
STOP mode.