DF2148BTE20 Renesas Electronics America, DF2148BTE20 Datasheet - Page 412

IC H8S MCU FLASH 128K 100-QFP

DF2148BTE20

Manufacturer Part Number
DF2148BTE20
Description
IC H8S MCU FLASH 128K 100-QFP
Manufacturer
Renesas Electronics America
Series
H8® H8S/2100r
Datasheets

Specifications of DF2148BTE20

Core Processor
H8S/2000
Core Size
16-Bit
Speed
20MHz
Connectivity
I²C, IrDA, SCI, X-Bus
Peripherals
PWM, WDT
Number Of I /o
74
Program Memory Size
128KB (128K x 8)
Program Memory Type
FLASH
Ram Size
4K 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
100-TQFP, 100-VQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Other names
HD64F2148BTE20
HD64F2148BTE20

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
DF2148BTE20V
Manufacturer:
Renesas Electronics America
Quantity:
10 000
Section 14 Watchdog Timer (WDT)
14.6
14.6.1
The watchdog timer’s registers, TCNT and TCSR differ from other registers in being more
difficult to write to. The procedures for writing to and reading from these registers are given
below.
Writing to TCNT and TCSR (Example of WDT_0): These registers must be written to by a
word transfer instruction. They cannot be written to by a byte transfer instruction.
TCNT and TCSR both have the same write address. Therefore, satisfy the relative condition
shown in figure 14.6 to write to TCNT or TCSR. To write to TCNT, the upper bytes must contain
the value H'5A and the lower bytes must contain the write data before the transfer instruction
execution. To write to TCSR, the upper bytes must contain the value H'A5 and the lower bytes
must contain the write data.
Reading from TCNT and TCSR (Example of WDT_0): These registers are read in the same
way as other registers. The read address is H'FFA8 for TCSR and H'FFA9 for TCNT.
Rev. 3.00 Mar 21, 2006 page 356 of 788
REJ09B0300-0300
<TCSR write>
<TCNT write>
Usage Notes
Notes on Register Access
Address : H'FFA8
Address : H'FFA8
Figure 14.6 Writing to TCNT and TCSR (WDT_0)
0
0
15
15
H'5A
H'A5
8 7
8 7
Write data
Write data
0
0

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