R5S77631Y266BGV Renesas Electronics America, R5S77631Y266BGV Datasheet - Page 722

• Manufacturer Part Number: R5S77631Y266BGV
• Description: IC SUPERH MPU ROMLESS 499BGA
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7780r

Specifications of R5S77631Y266BGV

• Core Processor: SH-4A
• Core Size: 32-Bit
• Speed: 266MHz
• Connectivity: Audio Codec, I²C, MMC, SCI, SIM, SIO, SSI, USB
• Peripherals: DMA, LCD, POR, WDT
• Number Of I /o: 107
• Program Memory Type: ROMless
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.15 V ~ 1.35 V
• Data Converters: A/D 4x10b; D/A 2x8b
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 499-BGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

Section 17 Watchdog Timer and Reset (WDT)
17.3.2
WDTCSR is a readable/writable 32-bit register that comprises the timer mode-selecting bit and
overflow flags. Use a longword access to write to the WDTCSR, with H'A5 in the bits 31 to 24.
The reading value of bits 31 to 24 is always H'00.
Rev. 2.00 May 22, 2009 Page 652 of 1982
REJ09B0256-0200
Initial value:
Initial value:
Bit
31 to 24
23 to 8
7
6
R/W:
R/W:
Bit:
Bit:
Watchdog Timer Control/Status Register (WDTCSR)
Bit Name
(Given
code)

TME
WT/IT
R/W
31
15
R
0
0
R/W
30
14
R
0
0
R/W
29
13
R
0
0
Initial
Value
H'00
All 0
0
0
(Given code)
R/W
28
12
R
0
0
R/W
R/W
R/W
R
R/W
R/W
27
11
R
0
0
R/W
26
10
R
0
0
Description
Reserved (Given code for writing)
These bits are always read as H'00. To write to this
register, the write value must be H'A5.
Reserved
These bits are always read as 0. The write value
should always be 0.
Timer Enable
Specifies starting and stopping of timer operation.
0: Stops counting up
1: Starts counting up
Timer Mode Select
Specifies whether the WDT is used as a watchdog
timer or interval timer. Up counting may not be
performed correctly if this bit is modified while the
WDT is running.
0: Interval timer mode
1: Watchdog timer mode
R/W
25
R
0
9
0
R/W
24
R
0
8
0
R/W
TME
23
R
0
7
0
WT/IT
R/W
22
R
0
6
0
RSTS
R/W
21
R
0
5
0
WOVF
R/W
20
R
0
4
0
IOVF
R/W
19
R
0
3
0
18
R
R
0
2
0
17
R
R
0
1
0
16
R
R
0
0
0