HD64F3048BF25 Renesas Electronics America, HD64F3048BF25 Datasheet - Page 472

• Manufacturer Part Number: HD64F3048BF25
• Description: IC H8 MCU FLASH 128K 100QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of HD64F3048BF25

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 8MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, PWM, WDT
• Number Of I /o: 70
• 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-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

Section 12 Watchdog Timer
12.2.2
TCSR is an 8-bit readable and writable * register. Its functions include selecting the timer mode
and clock source.
Note: * TCSR differs from other registers in being more difficult to write. For details see
Bits 7 to 5 are initialized to 0 by a reset and in standby mode. Bits 2 to 0 are initialized to 0 by a
reset. In software standby mode bits 2 to 0 are not initialized, but retain their previous values.
Bit 7—Overflow Flag (OVF): This status flag indicates that the timer counter has overflowed
from H'FF to H'00.
Bit 7: OVF
0
1
Rev. 3.00 Sep 27, 2006 page 444 of 872
REJ09B0325-0300
Bit
Initial value
Read/Write
Note: * Only 0 can be written, to clear the flag.
Timer Control/Status Register (TCSR)
section 12.2.4, Notes on Register Rewriting.
R/(W)
Description
[Clearing condition]
Cleared by reading OVF when OVF = 1, then writing 0 in OVF
[Setting condition]
Set when TCNT changes from H'FF to H'00
Overflow flag
Status flag indicating overflow
OVF
7
0
*
WT/IT
Timer mode select
Selects the mode
R/W
6
0
Timer enable
TME
Selects whether TCNT runs or halts
R/W
5
0
4
1
Reserved bits
3
1
CKS2
R/W
2
0
Clock select
These bits select the
TCNT clock source
CKS1
R/W
1
0
(Initial value)
CKS0
R/W
0
0