DF36902GFHV Renesas Electronics America, DF36902GFHV Datasheet - Page 221
DF36902GFHV
Manufacturer Part Number
DF36902GFHV
Description
IC H8 MCU FLASH 8K 32QFP
Manufacturer
Renesas Electronics America
Series
H8® H8/300H Tinyr
Specifications of DF36902GFHV
Core Processor
H8/300H
Core Size
16-Bit
Speed
12MHz
Connectivity
SCI
Peripherals
LVD, POR, PWM, WDT
Number Of I /o
18
Program Memory Size
8KB (8K x 8)
Program Memory Type
FLASH
Ram Size
1.5K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Data Converters
A/D 4x10b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
32-LQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Other names
HD64F36902GFHV
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The watchdog timer is an 8-bit timer that can generate an internal reset signal for this LSI if a
system crash prevents the CPU from writing to the timer counter, thus allowing it to overflow.
The block diagram of the watchdog timer is shown in figure 13.1.
13.1
WDT0110A_000020030300
Selectable from nine counter input clocks.
Eight clock sources ( /64, /128, /256, /512, /1024, /2048, /4096, and /8192) or the
WDT dedicated internal oscillator can be selected as the timer-counter clock. When the WDT
dedicated internal oscillator is selected, it can operate as the watchdog timer in any operating
mode.
Reset signal generated on counter overflow
An overflow period of 1 to 256 times the selected clock can be set.
The watchdog timer is enabled in the initial state.
It starts operating after the reset state is canceled.
Features
internal oscillator
WDT dedicated
[Legend]
TCSRWD: Timer control/status register WD
TCWD:
PSS:
TMWD:
φ
Figure 13.1 Block Diagram of Watchdog Timer
Section 13 Watchdog Timer
Timer counter WD
Prescaler S
Timer mode register WD
CLK
PSS
TCSRWD
TMWD
TCWD
Rev. 3.00 Sep. 14, 2006 Page 191 of 408
Section 13 Watchdog Timer
Internal reset
signal
REJ09B0105-0300
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