m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 465

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

APPENDIX
Appendix 2. Control registers
20-34
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 will be 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.
16
” succeedingly in this order, the watchdog timer will
7905 Group User’s Manual Rev.1.0
Function
16
)
16
” and next writing of “50
16
b7
,” the watchdog timer does not
Undefined
At reset
R/W
—
b0
Reference
14-4