HD64F2638F20J Renesas Electronics America, HD64F2638F20J Datasheet - Page 488
HD64F2638F20J
Manufacturer Part Number
HD64F2638F20J
Description
IC H8S MCU FLASH 256K 128-QFP
Manufacturer
Renesas Electronics America
Series
H8® H8S/2600r
Specifications of HD64F2638F20J
Core Processor
H8S/2600
Core Size
16-Bit
Speed
20MHz
Connectivity
CAN, SCI, SmartCard
Peripherals
Motor Control PWM, POR, PWM, WDT
Number Of I /o
72
Program Memory Size
256KB (256K x 8)
Program Memory Type
FLASH
Ram Size
16K x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Data Converters
A/D 12x10b; D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
128-QFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
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Manufacturer
Quantity
Price
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Part Number:
HD64F2638F20J
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PENESAS
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Section 12 Watchdog Timer
Writing to RSTCSR: RSTCSR must be written to by word transfer instruction to address
H'FF76. It cannot be written to with byte instructions.
Figure 12-3 shows the format of data written to RSTCSR. The method of writing 0 to the WOVF
bit differs from that for writing to the RSTE bit.
To write 0 to the WOVF bit, the write data must have H'A5 in the upper byte and H'00 in the
lower byte. This clears the WOVF bit to 0, but has no effect on the RSTE bit. To write to the
RSTE bit, the upper byte must contain H'5A and the lower byte must contain the write data. This
writes the values in bits 6 and 5 of the lower byte into the RSTE bit, but has no effect on the
WOVF bit.
Reading TCNT, TCSR, and RSTCSR (WDT0): These registers are read in the same way as
other registers. The read addresses are H'FF74 for TCSR, H'FF75 for TCNT, and H'FF77 for
RSTCSR.
Page 438 of 1458
Writing 0 to WOVF bit
Writing to RSTE bit
Address: H'FF76
Address: H'FF76
Figure 12-3 Format of Data Written to RSTCSR (WDT0)
15
15
H'A5
H'5A
8 7
8 7
H8S/2639, H8S/2638, H8S/2636,
Write data
REJ09B0103-0800 Rev. 8.00
H8S/2630, H8S/2635 Group
H'00
May 28, 2010
0
0
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