tmp88cs38ng TOSHIBA Semiconductor CORPORATION, tmp88cs38ng Datasheet - Page 15

• Manufacturer Part Number: tmp88cs38ng
• Description: Cmos 8-bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

XOUT pin
STOP
pin
STOP mode started
by the program.
STOP mode is released by the following sequence:
Note: The warm-up time is obtained by dividing the basic clock by the divider: therefore,
b.
1.
2.
3.
Example: Starting STOP mode from NORMAL mode
NORMAL
operation
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
pin input is high.
When returning to NORMAL, clock oscillator is turned on.
A warm-up period is inserted to allow oscillation time to stabilize. During
warm-up, all internal operations remain halted. Two different warm-up times can
be selected with WUT (Bits2 and 3 in SYSCR1) as determined by the resonator
characteristics.
When the warm-up time has elapsed, normal operation resumes with the
instruction following the STOP mode start instruction (e.g., [SET (SYSCR1). 7]).
The start is made after the divider of the timing generator is cleared to “0”.
LD
In this mode, STOP mode is released by a rising edge of the
In the edge-sensitive release mode, STOP mode is started even when the
the warm-up time may include a certain amount of error if there is any fluctuation of
the oscillation frequency when STOP mode is released. Thus, the warm-up time
must be considered an approximate value.
WUT
00
01
10
11
(SYSCR1), 10010000B
Figure 1.4.10 Edge-sensitive Release Mode
Table 1.4.1 Warm-up Time Example
Reserved
3 × 2
DV1CK = 0
2
2
operation
16
16
14
STOP
/fc
/fc
/fc
Return to NORMAL mode
88CS38-15
(12.29 m)
Warm-up Time [s]
(4.10 m)
(1.02 m)
( - )
;
V
IH
Starts after specified to the edge-sensitive mode
Warm up
Reserved
STOP mode is released by the hardware at the rising
edge of
3 × 2
DV1CK = 1
2
2
17
17
15
/fc
/fc
/fc
STOP
NORMAL
operation
(24.58 m)
pin input.
(8.20 m)
(2.05 m)
STOP
TMP88CS38/CM38A/CP38A
( - )
pin.
operation
STOP
STOP
2007-09-12
pin input.
STOP