TMP92CZ26A

92CZ26A-618

7 6 5 4 3 2 1 0

Bit symbol WDTE WDTP1 WDTP0 I2WDT RESCR WDMOD
(1300H) Read/Write R/W R/W
After reset 1 0 0 0 0 0
Function WDT control
1: Enable
Select detecting time
00: 215/fIO
01: 217/fIO
10: 219/fIO
11: 221/fIO
IDLE2
0: Stop
1: Operate
1: Internally
connects
WDT out
to the
reset pin
Always
write “0”

Watchdog timer out control
0
1 Connects WDT out to a reset
IDLE2 control
0 Stop
1 Operation
Watchdog timer detection time
00 215/fIO (Approximately 819.2 μs at fIO = 40 MHz)
01 217/fIO (Approximately 3.276 ms at fIO = 40 MHz)
10 219/fIO (Approximately 13.107 ms at fIO = 40 MHz)
11 221/fIO (Approximately 52.428 ms at fIO = 40 MHz)
Watchdog timer enable/disable control
0 Disabled
1 Enabled

Figure 3.24.4 Watchdog Timer Mo de Register

7 6 5 4 3 2 1 0

Bit symbol WDCR
(1301H) Read/Write W
After reset
Function B1H: WDT disable code
4EH: WDT clear code

WDT disable/clear control
B1H Disable code
4EH Clear code
Others Don’t care

Figure 3.24.5 Watchdog Timer Control Regi ster

Read
-modify
-write
instruction is
prohibited