DF3052BX25V Renesas Electronics America, DF3052BX25V Datasheet - Page 458

• Manufacturer Part Number: DF3052BX25V
• Description: MCU 5V 512K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of DF3052BX25V

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 70
• Program Memory Size: 512KB (512K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Section 12 Watchdog Timer
12.2.3
RSTCSR is an 8-bit readable/writable *
generated by watchdog timer overflow.
Bit
Initial value
Read/Write
Bit 7 is initialized by input of a reset signal at the RES pin. It is not initialized by reset signals
generated by watchdog timer overflow.
Notes: 1. RSTCSR differs from other registers in being more difficult to write. For details see
Bit 7—Watchdog Timer Reset (WRST): During watchdog timer operation, this bit indicates that
TCNT has overflowed and generated a reset signal. This reset signal resets the entire chip
internally.
Rev. 3.00 Mar 21, 2006 page 428 of 814
REJ09B0302-0300
Bit 7: WRST
0
1
2. Only 0 can be written in bit 7, to clear the flag.
3. Do not set bit 6 to 1.
Reset Control/Status Register (RSTCSR)
section 12.2.4, Notes on Register Access.
Watchdog timer reset
Indicates that a reset signal has been generated
R/(W)
WRST
7
0
Description
[Clearing conditions]
[Setting condition]
Set when TCNT overflow generates a reset signal during watchdog timer
operation
*
2
Reserved bit
Must not be set to 1
Cleared to 0 by reset signal input at RES pin
Cleared by reading WRST when WRST = 1, then writing 0 in WRST
—
—
6
0
—
—
1
5
1
register that monitors the state of the reset signal
*3
—
—
4
1
Reserved bits
—
—
3
1
—
—
2
1
—
—
1
1
(Initial value)
—
—
0
1