R8A77800ANBGAV Renesas Electronics America, R8A77800ANBGAV Datasheet - Page 684

• 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: -

Section 16 Watchdog Timer and Reset
16.3.4
WDTCNT is a 32-bit read-only register that comprises 12-bit watchdog timer counter and counts
up on the WDTBCNT overflow signal. When WDTCNT overflows, a reset is generated in
watchdog timer mode, or an interrupt is generated in interval timer mode. Writing to WDTCNT is
invalid.
16.3.5
WDTBCNT is a 32-bit read-only register that comprises 18-bit counter and counts up on the
peripheral clock (Pck). When WDTBCNT overflows, WDTCNT is counted up and WDTBCNT is
cleared to 0. Writing to WDTBCNT is invalid.
Rev.1.00 Dec. 13, 2005 Page 632 of 1286
REJ09B0158-0100
Initial value:
Initial value:
Initial value:
Initial value:
R/W:
R/W:
R/W:
R/W:
Bit:
Bit:
Bit:
Bit:
Watchdog Timer Counter (WDTCNT)
Watchdog Timer Base Counter (WDTBCNT)
31
15
31
15



R
R
R
R
0
0
0
0
30
14
30
14



R
R
R
R
0
0
0
0
29
13
29
13



R
R
R
R
0
0
0
0
28
12
28
12



R
R
R
R
0
0
0
0
27

11
27

11
R
R
R
R
0
0
0
0
26
10
26
10


R
R
R
R
0
0
0
0
25
25


R
R
R
R
0
0
9
0
9
0
WDTBCNT
24
24


R
R
R
R
0
8
0
0
8
0
23
23


R
R
R
R
0
7
0
0
7
0
22
22

WDTCNT

R
R
R
R
0
6
0
0
6
0
21
21


R
R
R
R
0
5
0
0
5
0
20
20


R
R
R
R
0
4
0
0
4
0
19

19

R
R
R
R
0
3
0
0
3
0
18
18


R
R
R
R
0
2
0
0
2
0
WDTBCNT
17
17

R
R
R
R
0
1
0
0
1
0
16
16

R
R
R
R
0
0
0
0
0
0