R8A77800ANBGAV Renesas Electronics America, R8A77800ANBGAV Datasheet - Page 683

• Manufacturer Part Number: R8A77800ANBGAV
• Description: IC SUPERH MPU ROMLESS 449-BGA
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7780r

Specifications of R8A77800ANBGAV

• Core Processor: SH-4A
• Core Size: 32-Bit
• Speed: 400MHz
• Connectivity: Audio Codec, MMC, Serial Sound, SCI, SIO, SPI, SSI
• Peripherals: DMA, POR, WDT
• Number Of I /o: 75
• Program Memory Type: ROMless
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.15 V ~ 1.35 V
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 449-BGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

16.3.3
WDTBST is a readable/writable 32-bit register that clears WDTBCNT. Use a longword write
access to clear the WDTBCNT, with H'55 in the bits 31 to 24. The reading value of this register is
always H'00.
Initial value:
Initial value:
Bit
5
4
3
2 to 0
R/W:
R/W:
Bit:
Bit:
Watchdog timer Base Stop Time Register (WDTBST)
Bit Name
RSTS
WOVF
IOVF

R/W
31
15

R
0
0
R/W
30
14

R
0
0
R/W
29
13

R
0
0
Initial
Value
0
0
0
R
(Given code)
R/W
28
12

R
0
0
R/W
R/W
R/W
R/W
R/W
All 0
27
11

R
0
0
R/W
26
10

R
0
0
Description
Reset Select
Specifies the kind of reset to be performed when
WDTCNT overflows in watchdog timer mode. This
setting is ignored in interval timer mode.
0: Power-on reset
1: Manual reset
Watchdog Timer Overflow Flag
Indicates that WDTCNT has overflowed in watchdog
timer mode. This flag is not set in interval timer mode.
0: An overflow has not occurred
1: An overflow on WDTCNT has occurred
Interval Timer Overflow Flag
Indicates that WDTCNT has overflowed in interval
timer mode. This flag is not set in watchdog timer
mode.
0: An overflow has not occurred
1: An overflow on WDTCNT has occurred
Reserved
These bits are always read as 0. The write value
should always be 0.
R/W
25

R
0
9
0
R/W
24

R
0
8
0
23


R
R
0
7
0
Rev.1.00 Dec. 13, 2005 Page 631 of 1286
22


R
R
0
6
0
Section 16 Watchdog Timer and Reset
21


R
R
0
5
0
20


R
R
0
4
0
19


R
R
0
3
0
REJ09B0158-0100
18


R
R
0
2
0
17


R
R
0
1
0
16

R

R
0
0
0