HD64F3642AH Renesas Electronics America, HD64F3642AH Datasheet - Page 292
![IC H8 MCU FLASH 16K 64QFP](/photos/28/61/286103/64-bqfp__prqp0064gb-a_sml.jpg)
HD64F3642AH
Manufacturer Part Number
HD64F3642AH
Description
IC H8 MCU FLASH 16K 64QFP
Manufacturer
Renesas Electronics America
Series
H8® H8/300Lr
Datasheet
1.HD64F3644HV.pdf
(551 pages)
Specifications of HD64F3642AH
Core Processor
H8/300L
Core Size
8-Bit
Speed
8MHz
Connectivity
SCI
Peripherals
PWM, WDT
Number Of I /o
53
Program Memory Size
16KB (16K x 8)
Program Memory Type
FLASH
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 8x8b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
64-QFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
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Section 9 Timers
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.
Features
Features of the watchdog timer are given below.
Block Diagram
Figure 9.35 shows a block diagram of the watchdog timer.
Rev. 6.00 Sep 12, 2006 page 270 of 526
REJ09B0326-0600
Legend:
TCSRW:
TCW:
PSS:
Incremented by internal clock source ( /8192).
A reset signal is generated when the counter overflows. The overflow period can be set from 1
to 256 times 8192/ (from approximately 2 ms to 500 ms when = 4.19 MHz).
Overview
Watchdog Timer
Timer control/status register W
Timer counter W
Prescaler S
PSS
Figure 9.35 Block Diagram of Watchdog Timer
/8192
TCSRW
TCW
Internal reset
signal
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