tmp89fm42 TOSHIBA Semiconductor CORPORATION, tmp89fm42 Datasheet - Page 43

• Manufacturer Part Number: tmp89fm42
• Description: 8 Bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

RA001
Even if the
Figure 2-8 Level-sensitive Release Mode (Example when the high-frequency clock oscillation
Figure 2-9 Edge-sensitive Release Mode (Example when the high-frequency clock oscillation
STOP pin
XOUT pin
NORMAL mode
The STOP mode
is started
by the program.
Note: When the STOP mode is released, the warm-up counter source clock automatically changes to the clock that generated the
Note: If the rising edge is input to the
STOP
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main system clock when the STOP mode was started, regardless of WUCCR<WUCSEL>.
be released.
pin input returns to low after the warm-up starts, the STOP mode is not restarted.
Example: Starting the STOP mode from the NORMAL mode
LD
LD
DI
LD
(Warm-up time at release of the STOP mode is about 200ms at fc=10 MHz.)
- Edge-sensitive release mode
(WUCCR),0x01
(WUCDR),0x20
(SYSCR1) , 0x80
periodic intervals. This periodic signal (for example, a clock from a low-power con-
sumption oscillator) is input to the
STOP mode is started even when the
STOP
In this mode, the STOP mode is released at the rising edge of the
Setting SYSCR1<RELM> to "0" selects the edge-sensitive release mode.
This is used in applications where a relatively short program is executed repeatedly at
STOP
mode
pin within 1 machine cycle after SYSCR1<STOP> is set to "1", the STOP mode will not
circuit is selected)
circuit is selected)
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V IH
Page 29
The STOP mode is released by the hardware
at the rising edge of the STOP pin input.
Warm-up
; WUCCR<WUCDIV> = 00 (No division) (Note)
;
;
; IMF = 0
; Starts the STOP mode with the edge-sensitive release mode selected
Sets the warm-up time
200ms / 6.4Ps = 31.25 o round up to 0x20
STOP
NORMAL
STOP
mode
pin. In the edge-sensitive release mode, the
pin input is high
STOP
mode
STOP
TMP89FM42
pin input.