tmp88fw45afg TOSHIBA Semiconductor CORPORATION, tmp88fw45afg Datasheet - Page 84
tmp88fw45afg
Manufacturer Part Number
tmp88fw45afg
Description
8 Bit Microcontroller Tlcs-870/x Series
Manufacturer
TOSHIBA Semiconductor CORPORATION
Datasheet
1.TMP88FW45AFG.pdf
(294 pages)
- Current page: 84 of 294
- Download datasheet (4Mb)
7.2
Watchdog Timer Control
Example :Setting the watchdog timer detection time to 2
7.2
7.2.1
timer is automatically enabled after the reset release.
Watchdog Timer Control
The watchdog timer is controlled by the watchdog timer control registers (WDTCR1 and WDTCR2). The watchdog
Within 3/4 of WDT
detection time
Within 3/4 of WDT
detection time
timer output is activated by the binary-counter overflow unless the binary counters are cleared. When
WDTCR1<WDTOUT> is set to “1” at this time, the reset request is generated and then internal hardware is
initialized. When WDTCR1<WDTOUT> is set to “0”, a watchdog timer interrupt (INTWDT) is generated.
automatically restarts (continues counting) when the STOP/IDLE mode is inactivated.
Malfunction Detection Methods Using the Watchdog Timer
The CPU malfunction is detected, as shown below.
If the CPU malfunctions such as endless loops or the deadlock conditions occur for some reason, the watchdog
The watchdog timer temporarily stops counting in the STOP mode including the warm-up or IDLE mode, and
Note:The watchdog timer consists of an internal divider and a two-stage binary counter. When the clear code
1. Set the detection time, select the output, and clear the binary counter.
2. Clear the binary counter repeatedly within the specified detection time.
4EH is written, only the binary counter is cleared, but not the internal divider. The minimum binary-counter
overflow time, that depends on the timing at which the clear code (4EH) is written to the WDTCR2 register,
may be 3/4 of the time set in WDTCR1<WDTT>. Therefore, write the clear code using a cycle shorter
than 3/4 of the time set to WDTCR1<WDTT>.
LD
LD
LD
:
:
LD
:
:
LD
(WDTCR2), 4EH
(WDTCR1), 00001101B
(WDTCR2), 4EH
(WDTCR2), 4EH
(WDTCR2), 4EH
21
Page 70
/fc [s], and resetting the CPU malfunction detection
: Clears the binary counters.
: WDTT ← 10, WDTOUT ← 1
: Clears the binary counters (always clears immediately before and
after changing WDTT).
: Clears the binary counters.
: Clears the binary counters.
TMP88FW45AFG
Related parts for tmp88fw45afg
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
MCU, MPU & DSP Development Tools Software
Manufacturer:
Toshiba
Part Number:
Description:
Toshiba Semiconductor [TOSHIBA IGBT Module Silicon N Channel IGBT]
Manufacturer:
TOSHIBA Semiconductor CORPORATION
Datasheet:
Part Number:
Description:
Toshiba Semiconductor [SILICON N CHANNEL 1GBT]
Manufacturer:
TOSHIBA Semiconductor CORPORATION
Datasheet:
Part Number:
Description:
Toshiba Semiconductor [GTR Module Silicon N Channel IGBT High Power Switching Applications Motor Control Applications]
Manufacturer:
TOSHIBA Semiconductor CORPORATION
Datasheet:
Part Number:
Description:
Toshiba Semiconductor [Power Module]
Manufacturer:
TOSHIBA Semiconductor CORPORATION
Datasheet:
Part Number:
Description:
TOSHIBA GTR MODULE SILICON NPN TRIPLE DIFFUSED TYPE
Manufacturer:
TOSHIBA Semiconductor CORPORATION
Datasheet:
Part Number:
Description:
TOSHIBA GTR Module Silicon N Channel IGBT
Manufacturer:
TOSHIBA Semiconductor CORPORATION
Datasheet:
Part Number:
Description:
TOSHIBA Intelligent Power Module Silicon N Channel IGBT
Manufacturer:
TOSHIBA Semiconductor CORPORATION
Datasheet:
Part Number:
Description:
TOSHIBA INTELLIGENT POWER MODULE SILICON N CHANNEL LGBT
Manufacturer:
TOSHIBA Semiconductor CORPORATION
Datasheet:
Part Number:
Description:
TOSHIBA IGBT Module Silicon N Channel IGBT
Manufacturer:
TOSHIBA Semiconductor CORPORATION
Datasheet:
Part Number:
Description:
TOSHIBA GTR MODULE SILICON N−CHANNEL IGBT
Manufacturer:
TOSHIBA Semiconductor CORPORATION
Datasheet:
Part Number:
Description:
TOSHIBA Intelligent Power Module Silicon N Channel IGBT
Manufacturer:
TOSHIBA Semiconductor CORPORATION
Datasheet:
Part Number:
Description:
TOSHIBA GTR Module Silicon N Channel IGBT
Manufacturer:
TOSHIBA Semiconductor CORPORATION
Datasheet:
Part Number:
Description:
TOSHIBA INTELLIGENT POWER MODULE
Manufacturer:
TOSHIBA Semiconductor CORPORATION
Datasheet:
Part Number:
Description:
TOSHIBA Intelligent Power Module Silicon N Channel IGBT
Manufacturer:
TOSHIBA Semiconductor CORPORATION
Datasheet: