R8A77850ANBGV Renesas Electronics America, R8A77850ANBGV Datasheet - Page 796
![IC SUPERH MPU ROMLESS 436-BGA](/photos/28/62/286211/436-bfbga_sml.jpg)
R8A77850ANBGV
Manufacturer Part Number
R8A77850ANBGV
Description
IC SUPERH MPU ROMLESS 436-BGA
Manufacturer
Renesas Electronics America
Series
SuperH® SH7780r
Datasheet
1.R8A77850AADBGV.pdf
(1694 pages)
Specifications of R8A77850ANBGV
Core Processor
SH-4A
Core Size
32-Bit
Speed
600MHz
Connectivity
Audio Codec, MMC, Serial Sound, SCI, SIO, SPI, SSI
Peripherals
DMA, POR, WDT
Number Of I /o
108
Program Memory Type
ROMless
Ram Size
8K x 8
Voltage - Supply (vcc/vdd)
1 V ~ 1.2 V
Oscillator Type
External
Operating Temperature
-20°C ~ 75°C
Package / Case
436-BGA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Program Memory Size
-
Data Converters
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
R8A77850ANBGV
Manufacturer:
Renesas Electronics America
Quantity:
10 000
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16. Watchdog Timer and Reset (WDT)
16.3.2
WDTCSR is a 32-bit readable/writable register comprising timer mode-selecting bits and overflow
flags.
WDTCSR should be written to as a longword unit, with H'A5 in the most significant byte. The
value read from this byte is always H'00. WDTCSR is only rest by a power-on reset caused by the
PRESET pin.
Rev.1.00 Jan. 10, 2008 Page 764 of 1658
REJ09B0261-0100
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
(Code for
writing)
⎯
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
All 0
All 0
0
0
Code for writing (H'A5)
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
Code for writing (H'A5)
These bits are always read as H'00. When writing to
this register, the value written to these bits must be
H'A5.
Reserved
These bits are always read as 0. The write value
should always be 0.
Timer Enable
Starts or stops the 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
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