M37702E6BFS Renesas Electronics America, M37702E6BFS Datasheet - Page 251

• Manufacturer Part Number: M37702E6BFS
• Description: EPROM MCU/8BIT CMOS EMULATION CH
• Manufacturer: Renesas Electronics America

Specifications of M37702E6BFS

• Accessory Type: Emulator EPROM MCU
• For Use With/related Products: 7702
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Fig. 9.1.2 Structure of watchdog timer register
9.1.1 Watchdog timer
Watchdog timer is a 12-bit counter that down-counts the count source which is selected with the watchdog
timer frequency select bit (bit 0 at address 61
in the cases listed below. An arbitrary value cannot be set to Watchdog timer.
When dummy data is written to the watchdog timer register (Refer to Figure 9.1.2.)
When the most significant bit of Watchdog timer becomes “0”
When the STP instruction is executed (Refer to “Chapter 10. STOP MODE.”)
At reset
b7
b0
Watchdog timer register (Address 60
7 to 0
Bit
Initializes the watchdog timer.
When a dummy data is written to this register, the watchdog
timer’s value is initialized to “FFF
7702/7703 Group User’s Manual
16
). A value “FFF
Functions
16
)
16
.” (Dummy data: 00
16
WATCHDOG TIMER
” is automatically set in Watchdog timer
16
9.1 Block description
to FF
16
)
Undefined
At reset
RW
–
9–3