7733 datasheet(304/940 Pages) RENESAS

номер детали	7733

подробное описание детали	16-BIT SINGLE-CHIP MICROCOMPUTER

PDF	940 Pages

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WATCHDOG TIMER

7733 Group User’s Manual

10-7

Table 10.2.2 Watchdog timer’s operation and bit state related to oscillation circuit control

Bit state related to oscillation circuit control

10.2 Operation description

Port-Xc selection bit

(Bit 4 at address 6C16)

System clock

selection bit

(Bit 3 at address 6C16)

Main clock external

input selection bit

(Bit 1 at address 6F16)

Sub clock external

input selection bit

(Bit 2 at address 6F16)

Watchdog

timer’s operation

Note: For each bit’s function, refer to Figures 10.2.1 and 10.2.2. For the procedure of writing to the main

clock external input selection bit and the sub clock external input selection bit, refer to Figure 10.2.3.

10.2.3 Operation in wait mode

When the system clock stop bit at wait state (bit 5 at address 6C16 ; Refer to Figure 10.2.1.) = “1,” the

watchdog timer stops operating in the wait mode. Furthermore, after the wait mode is terminated, the

watchdog timer restarts counting from the same state as that before the watchdog timer stops.

When the system clock stop bit at wait state = “0,” the watchdog timer does not stop.

7733 датащи(PDF) 304 Page - Renesas Technology Corp