HD6473937RXV Renesas Electronics America, HD6473937RXV Datasheet - Page 247

• Manufacturer Part Number: HD6473937RXV
• Description: MCU 3/5V 60K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300L SLPr

Specifications of HD6473937RXV

• Core Processor: H8/300L
• Core Size: 8-Bit
• Speed: 10MHz
• Connectivity: SCI
• Peripherals: POR, WDT
• Number Of I /o: 59
• Program Memory Size: 60KB (60K x 8)
• Program Memory Type: OTP
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

9.6
9.6.1
The watchdog timer has an 8-bit counter that is incremented by an input clock. If a system
runaway allows the counter value to overflow before being rewritten, the watchdog timer can reset
the chip internally.
1. Features
Features of the watchdog timer are given below.
2. Block diagram
Figure 9-17 shows a block diagram of the watchdog timer.
øw/32
Incremented by internal clock source (ø/8192 or øw/32).
A reset signal is generated when the counter overflows. The overflow period can be set from
from 1 to 256 times 8192/ø or 32/øw (from approximately 4 ms to 1000 ms when ø = 2.00
MHz).
Use of module standby mode enables this module to be placed in standby mode independently
when not used.
ø
Notation:
TCSRW:
TCW:
PSS:
Watchdog Timer
Overview
Timer control/status register W
Timer counter W
Prescaler S
PSS
Figure 9-17 Block Diagram of Watchdog Timer
ø/8192
TCSRW
TCW
Reset signal
233