tmp88cs38ng TOSHIBA Semiconductor CORPORATION, tmp88cs38ng Datasheet - Page 14

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

1.4.4
XOUT pin
STOP
pin
Note 1: After warming up is started, when
Note 2: When changing to the level-sensitive release mode from the edge-sensitive release mode, the release
Operating Mode Control
(1) STOP mode
Example: Starting STOP mode with an INT5 interrupt.
PINT5:
SINT5:
pin input. The
interrupt input 5) pin. STOP mode is started by setting STOP (Bit7 in SYSCR1 ) to “1”.
During STOP mode, the following status is maintained.
mode, either of which can be selected with RELM (Bit6 in SYSCR1).
1.
2.
3.
4.
a.
mode is not switched until a rising edge of the
STOP mode is controlled by the system control register 1 (SYSCR1) and the
STOP mode includes a level-sensitive release mode and an edge-sensitive release
Using an external interrupt input
NORMAL
operation
Oscillations are turned off, and all internal operations are halted.
The data memory, registers and port output latches are all held in the status in
effect before STOP mode was entered.
The prescaler and the divider of the timing generator are cleared to “0”.
The program counter holds the address of the instruction following the instruction
which started the STOP mode.
Level-sensitive release mode (RELM = 1)
is used for capacitor backup when the main power supply is cut off and long term
battery backup.
STOP mode will not place in STOP mode but instead will immediately start the
release sequence (Warm up). Thus, to start STOP mode in the level-sensitive
release mode, it is necessary for the program to first confirm that the
input is low. The following method can be used for confirmation:
In this mode, STOP mode is released by setting the
When the
TEST
JRS
LD
SET
LDW
RETI
Figure 1.4.9 Level-sensitive Release Mode
(P2). 0
F, SINT5
(SYSCR1), 01010000B
(SYSCR1). 7
(IL), 1110011101010111B
STOP
STOP
Confirm by program that the
start STOP mode.
STOP
pin is also used both as a port P20 and an
pin input is low and
pin input is high, executing an instruction which starts the
operation
STOP
88CS38-14
STOP
pin input is changed “L” level, STOP mode is not placed.
INT5
STOP
;
;
;
;
(
pin input is detected.
INT5
To reject noise, the STOP mode does not start if port
P20 is at high
Starts STOP mode
IL
Sets up the level-sensitive release mode
V
IH
12, 11, 7, 5, 3
STOP mode is released by the hardware.
Warm up
is a falling edge-sensitive input).
Always released if the
pin input is high.
← 0 (Clears interrupt latches)
TMP88CS38/CM38A/CP38A
STOP
pin high. This mode
NORMAL
operation
STOP
INT5
2007-09-12
(External
STOP
STOP
pin