HD64F3026X25 Renesas Electronics America, HD64F3026X25 Datasheet - Page 379

• Manufacturer Part Number: HD64F3026X25
• Description: MCU 3V 256K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of HD64F3026X25

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: SCI, SmartCard
• Peripherals: PWM, WDT
• Number Of I /o: 70
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 3 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: -

11.1.4
Table 11.2 summarizes the WDT registers.
Table 11.2 WDT Registers
Notes: 1. Lower 20 bits of the address in advanced mode.
11.2
11.2.1
TCNT is an 8-bit readable and writable up-counter.
Note: The method for writing to TCNT is different from that for general registers to prevent
When the TME bit is set to 1 in TCSR, TCNT starts counting pulses generated from an internal
clock source selected by bits CKS2 to CKS0 in TCSR. When the count overflows (changes from
H'FF to H'00), the OVF bit is set to 1 in TCSR. TCNT is initialized to H'00 by a reset and when
the TME bit is cleared to 0.
Write *
H'FFF8C
H'FFF8E
Bit
Initial value
Read/Write
Address *
2
inadvertent overwriting. For details see section 11.2.4, Notes on Register Access.
2. Write word data starting at this address.
3. Only 0 can be written in bit 7, to clear the flag.
Register Configuration
Register Descriptions
Timer Counter (TCNT)
Read
H'FFF8C
H'FFF8D
H'FFF8F
1
R/W
7
0
Timer control/status register
Timer counter
Reset control/status register
Name
R/W
6
0
R/W
5
0
R/W
4
0
Rev. 2.00 Sep 20, 2005 page 339 of 800
Abbreviation
TCSR
TCNT
RSTCSR
R/W
3
0
R/W
Section 11 Watchdog Timer
2
0
R/W
R/(W) *
R/W
R/(W) *
R/W
REJ09B0260-0200
1
0
3
3
Initial Value
H'18
H'00
H'3F
R/W
0
0