R8A77800ANBGAV Renesas Electronics America, R8A77800ANBGAV Datasheet - Page 681

• 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: -

16.3.1
WDTST is a readable/writable 32-bit register that specifies the time until a watchdog timer
overflows. The time until WDTCNT overflows becomes the minimum value when set H'001 to
the bits 11 to 0, and the maximum value when set H'000 to the bits 11 to 0. Use a longword access
to write to the WDTST, with H'5A in the bits 31 to 24. The reading value of bits 31 to 24 is
always H'00.
Initial value:
Initial value:
Bit
31 to 24
23 to 12
11 to 0
R/W:
R/W:
Bit:
Bit:
Watchdog Timer Stop Time Register (WDTST)
Bit Name
(Given
code)

WDTST
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
All 0
(Given code)
R/W
28
12

R
0
0
R/W
R/W
R/W
R/W
R
R/W
27
11
0
0
R/W
R/W
26
10
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'5A.
Reserved
These bits are always read as 0. The write value
should always be 0.
Counter value
R/W
R/W
25
0
9
0
R/W
R/W
24
0
8
0
R/W
23

R
0
7
0
WDTST
Rev.1.00 Dec. 13, 2005 Page 629 of 1286
R/W
22

R
0
6
0
Section 16 Watchdog Timer and Reset
R/W
21

R
0
5
0
R/W
20

R
0
4
0
R/W
19

R
0
3
0
REJ09B0158-0100
R/W
18

R
0
2
0
R/W
17

R
0
1
0
R/W
16

R
0
0
0