r5f21346mnfp Renesas Electronics Corporation., r5f21346mnfp Datasheet - Page 213
r5f21346mnfp
Manufacturer Part Number
r5f21346mnfp
Description
Single-chip Mcus Incorporates The R8c Cpu Core
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.R5F21346MNFP.pdf
(776 pages)
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Part Number:
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R8C/34M Group
R01UH0131EJ0100 Rev.1.00
Jun 21, 2011
Figure 14.1
Bits WDTRCS0 and WDTRCS1
CPU clock
Oscillation starts
when CSPRO = 1
Internal reset signal
Write to WDTR register
Note:
1. A value set by bits WDTUFS0 and WDTUFS1 is set in the watchdog timer (value when shipping: 3FFFh).
(“L” active)
Watchdog Timer Block Diagram
Low-speed on-chip oscillator
for watchdog timer
Prescaler
1/128
1/16
1/2
Refresh period
CM07 = 0,
WDTC7 = 1
control circuit
CM07 = 1
CM07 = 0,
WDTC7 = 0
CSPRO = 0
CSPRO: Bit in CSPR register
WDTC7: Bit in WDTC register
PM12: Bit in PM1 register
CM07: Bit in CM0 register
WDTUFS0, WDTUFS1, WDTRCS0, WDTRCS1: Bits in OFS2 register
CSPRO = 1
Watchdog timer
(Note 1)
14. Watchdog Timer
PM12 = 1
PM12 = 0
Page 181 of 740
Watchdog
timer reset
Watchdog timer
interrupt request
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