HD64F2319EVTE25 Renesas Electronics America, HD64F2319EVTE25 Datasheet - Page 456
HD64F2319EVTE25
Manufacturer Part Number
HD64F2319EVTE25
Description
IC H8S MCU FLASH 512K 100-QFP
Manufacturer
Renesas Electronics America
Series
H8® H8S/2300r
Specifications of HD64F2319EVTE25
Core Processor
H8S/2000
Core Size
16-Bit
Speed
25MHz
Connectivity
SCI, SmartCard
Peripherals
POR, PWM, WDT
Number Of I /o
71
Program Memory Size
512KB (512K x 8)
Program Memory Type
FLASH
Ram Size
8K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 3.6 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
Contains lead / RoHS non-compliant
Eeprom Size
-
Available stocks
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Company:
Part Number:
HD64F2319EVTE25
Manufacturer:
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Quantity:
10 000
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Section 11 Watchdog Timer
Bit 5—Reserved: This bit should be written with 0.
Bits 4 to 0—Reserved: These bits cannot be modified and are always read as 1.
11.2.4
The watchdog timer’s TCNT, TCSR, and RSTCSR registers differ from other registers in being
more difficult to write to. The procedures for writing to and reading these registers are given
below.
Writing to TCNT and TCSR: These registers must be written to by a word transfer instruction.
They cannot be written to with byte instructions.
Figure 11.2 shows the format of data written to TCNT and TCSR. TCNT and TCSR both have the
same write address. For a write to TCNT, the upper byte of the written word must contain H'5A
and the lower byte must contain the write data. For a write to TCSR, the upper byte of the written
word must contain H'A5 and the lower byte must contain the write data. This transfers the write
data from the lower byte to TCNT or TCSR.
Writing to RSTCSR: RSTCSR must be written to by a word transfer instruction to address
H'FFBE. It cannot be written to with byte instructions.
Figure 11.3 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 value in bit 6 of the lower byte into the RSTE bit, but has no effect on the WOVF bit.
Rev.7.00 Feb. 14, 2007 page 422 of 1108
REJ09B0089-0700
TCNT write
TCSR write
Notes on Register Access
Address: H'FFBC
Address: H'FFBC
Figure 11.2 Writing to TCNT and TCSR
15
15
H'5A
H'A5
8 7
8 7
Write data
Write data
0
0
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