DF2398TE20V Renesas Electronics America, DF2398TE20V Datasheet - Page 489
DF2398TE20V
Manufacturer Part Number
DF2398TE20V
Description
IC H8S MCU FLASH 256K 120TQFP
Manufacturer
Renesas Electronics America
Series
H8® H8S/2300r
Specifications of DF2398TE20V
Core Processor
H8S/2000
Core Size
16-Bit
Speed
20MHz
Connectivity
SCI, SmartCard
Peripherals
DMA, POR, PWM, WDT
Number Of I /o
87
Program Memory Size
256KB (256K x 8)
Program Memory Type
FLASH
Ram Size
8K x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Data Converters
A/D 8x10b; D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
120-TQFP, 120-VQFP
For Use With
YR0K42378FC000BA - KIT EVAL FOR H8S/2378
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Other names
HD64F2398TE20V
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
DF2398TE20V
Manufacturer:
Renesas Electronics America
Quantity:
10 000
- Current page: 489 of 1049
- Download datasheet (5Mb)
13.2.4
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 13-2 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 word transfer instruction to address H'FFBE. It cannot be written to
with byte instructions.
Figure 13-3 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 and RSTS bits.
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 and RSTS bits. To write to the RSTE and RSTS bits, 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 and RSTS bits, but has no effect on the WOVF bit.
Reading TCNT, TCSR, and RSTCSR: These registers are read in the same way as other registers. The read addresses
are H'FFBC for TCSR, H'FFBD for TCNT, and H'FFBF for RSTCSR.
Notes on Register Access
Writing 0 to WOVF bit
Writing to RSTE and RSTS bits
TCNT write
TCSR write
Address: H'FFBE
Address: H'FFBE
Address: H'FFBC
Address: H'FFBC
Figure 13-2 Format of Data Written to TCNT and TCSR
Figure 13-3 Format of Data Written to RSTCSR
15
15
15
15
H'5A
H'A5
H'A5
H'5A
8 7
8 7
8 7
8 7
Rev.6.00 Oct.28.2004 page 459 of 1016
Write data
Write data
Write data
H'00
REJ09B0138-0600H
0
0
0
0
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