r5f21368sdfp Renesas Electronics Corporation., r5f21368sdfp Datasheet - Page 103

• Manufacturer Part Number: r5f21368sdfp
• Description: Renesas Mcu R8c Family / R8c/3xt-a Series
• Manufacturer: Renesas Electronics Corporation.

Under development
R8C/36T-A Group
R01UH0240EJ0001 Rev.0.01
Apr 28, 2011
Figure 8.1
bits WDTC7 and WDTC6 = 11b
CSPRO = 1 or CSPRO = 1 and
Low-speed on-chip
oscillator clock for
Bits WDTRCS0 and WDTRCS1
watchdog timer
CPU clock
Write to WDTR register
Oscillation on when
Internal reset signal
Preliminary document
Specifications in this document are tentative and subject to change.
Watchdog Timer Block Diagram
(active low)
CSPRO: Bit in CSPR register
WDTC6, WDTC7: Bits in WDTC register
RIS: Bit in RISR register
WDTUFS0, WDTUFS1, WDTRCS0, WDTRCS1: Bits in OFS2 register
Note:
Low-speed on-chip oscillator
1. The value set by bits WDTUFS0 and WDTUFS1 is set (value when shipped: 3FFFh).
clock for watchdog timer
1/128
Prescaler
1/16
1/16
1/2
WDTC7 and WDTC6
= 00b
= 01b
= 10b
= 11b
Refresh period
control circuit
CSPRO = 0
CSPRO = 1
Watchdog
timer
(Note 1)
8. Watchdog Timer
RIS = 0
Watchdog timer
interrupt request
RIS = 1
Watchdog
timer reset
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