tmp88cu74 TOSHIBA Semiconductor CORPORATION, tmp88cu74 Datasheet - Page 16

• Manufacturer Part Number: tmp88cu74
• Description: Cmos 8-bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

Note 1: Even if the
Note 2: In this case of changing to the level-sensitive mode from the edge-sensitive mode, the release
XOUT pin
STOP
XOUT pin
STOP
pin
mode is not switched until a rising edge of the
pin
NORMAL operation
NORMAL operation
STOP mode started
by the program.
b.
1.
2.
STOP
Edge-sensitive release mode (RELM = “0”)
This is used in applications where a relatively short program is executed
repeatedly at periodic intervals. This periodic signal (for example, a clock from a
low-power consumption oscillator) is input to the
release mode, STOP mode is started even when the
and low-frequency clock oscillators are turned on; when returning to SLOW mode,
only the low-frequency clock oscillator is turned on. In the signal-clock mode, only
the high-frequency clock oscillator is turned on.
A warming-up period is inserted to allow oscillation time to stabilize. During
warm-up, all internal operations remain halted. Four different warming-up times
can be selected with the WUT (bits 2 and 3 in SYSCR1) in accordance with the
resonator characteristics.
In the dual-clock mode, when returning to NORMAL2, both the high-frequency
Example: Starting STOP mode from NORMAL mode
In this mode, STOP mode is released by a rising edge of the STOP pin input.
STOP mode is released by the following sequence.
pin input is low after warming up start, the STOP mode is not restarted.
Figure 1.4.10 Edge-sensitive Release Mode
Figure 1.4.9 Level-sensitive Release Mode
Confirm by program that the
start STOP mode.
STOP
LD
STOP operation
STOP operation
pin input is low and
(SYSCR1), 10010000B
88CU74-16
V
STOP
IH
Warm-up
STOP mode is released by the hardware at the rising
edge of
pin input is detected.
V
STOP mode is released by the hardware.
IH
STOP
Warm-up
NORMAL
operation
Always released if the
pin input is high.
;
pin input.
release mode
Starts after specified to the edge-sensitive
STOP
STOP
pin. In the edge-sensitive
pin input is high level.
STOP operation
NORMAL operation
STOP
TMP88CU74
2007-10-19
2003-02-17