r5f21368sdfp Renesas Electronics Corporation., r5f21368sdfp Datasheet - Page 106

• 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
8.2.3
8.2.4
8.2.5
Note:
b7
After Reset
After Reset
After Reset
After Reset
1. To set the CSPRO bit to 1, first write 0 and then write 1. This bit cannot be set to 0 by a program. Interrupts and
Bit
b0
b1
b2
b3
b4
b5
b6
b7
Bit
b0
b1
b2
b3
b4
b5
b6
b7
Bit
to
Address 00022h
Address 00023h
Address 00024h
DTC activation must be disabled between writing 0 and writing 1.
Symbol
Symbol WDTC7
Symbol CSPRO
b0
WDTC6 Watchdog timer count source
WDTC7
CSPRO Count source protection mode select bit
Symbol
Symbol
Bit
Bit
Bit
Watchdog Timer Start Register (WDTS)
Watchdog Timer Control Register (WDTC)
Count Source Protection Mode Register (CSPR)
The watchdog timer is started by executing a write instruction to this register.
—
—
—
—
—
—
—
—
—
—
—
—
—
The above applies when the CSPROINI bit in the OFS register is 0.
The above applies when the CSPROINI bit in the OFS register is 1.
Preliminary document
Specifications in this document are tentative and subject to change.
b7
b7
b7
—
1
0
1
0
Reserved
select bits
Reserved
WDTC6
b6
b6
b6
—
—
1
1
0
0
Bit Name
Bit Name
b5
b5
b5
—
—
—
1
1
0
0
b4
b4
b4
—
—
—
1
1
0
0
Function
The read value is undefined.
b7 b6
0 0: CPU clock divided by 2
0 1: CPU clock divided by 16
1 0: CPU clock divided by 128
1 1: Low-speed on-chip oscillator divided by 16
(1)
b3
b3
b3
—
—
—
1
1
0
0
Set to 0.
0: Count source protection mode disabled
1: Count source protection mode enabled
b2
b2
b2
—
—
—
1
1
0
0
Function
b1
b1
b1
—
—
—
1
1
0
0
Function
b0
b0
—
b0
—
—
1
1
0
0
8. Watchdog Timer
Page 75 of 725
R/W
R/W
R/W
R/W
R/W
R/W
R/W
W
R