m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 361

• Manufacturer Part Number: m37905
• Description: Mitsubishi 16-bit Single-chip Microcomputer 7700 Family / 7900 Series
• Manufacturer: Renesas Electronics Corporation.

14.1 Block description
WATCHDOG TIMER
Fig. 14.1.4 Structure of particular function select register 2
14-4
14.1.3 Particular function select register 2
When not using the watchdog timer, this register can be used to disable the watchdog timer. Figure 14.1.4
shows the structure of the particular function select register 2.
only at the stop mode termination if the external clock input select bit (bit 1 at address 62
to section “15.3 Stop mode.”)
In addition, even when the watchdog timer is disabled by this register, the watchdog timer can be active
Particular function select register 2 (Address 64
Note: After reset, this register can be set only once. Writing to this register requires the following procedure:
7 to 0
Bit
• Write values of “79
• For the above writing, be sure to use the MOVMB (MOVM when m = 1) instruction or the STAB (STA when m = 1).
Note that the following: if an interrupt occurs between writing of “79
stop its operation.
If any of the following has been performed after reset, writing to this register is disabled from that time:
• If this register is read out.
• If writing to this register is performed by the procedure other than the above procedure.
Disables the watchdog timer.
When values of “79
stop its operation.
16
” and “50
16
” and “50
16
” to this register succeedingly in this order.
7905 Group User’s Manual Rev.1.0
16
” succeedingly in this order, the watchdog timer will
Function
16
)
16
” and next writing of “50
16,
b7
” the watchdog timer does not
Undefined
At reset
16
) = “0.” (Refer
R/W
—
b0