HD64F3067RF20 Renesas Electronics America, HD64F3067RF20 Datasheet - Page 374

• Manufacturer Part Number: HD64F3067RF20
• Description: IC H8 MCU FLASH 128K 100-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of HD64F3067RF20

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 20MHz
• 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
• Package: 100PQFP
• Family Name: H8
• Maximum Speed: 20 MHz
• Operating Supply Voltage: 5 V
• Data Bus Width: 16|32 Bit
• Number Of Programmable I/os: 70
• Interface Type: SCI
• On-chip Adc: 8-chx10-bit
• On-chip Dac: 2-chx8-bit
• Number Of Timers: 7
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

Section 9 16-Bit Timer
Bit 0—Overflow Flag 0 (OVF0): This status flag indicates TCNT0 overflow.
Bit 0
OVF0
0
1
9.2.7
TCNT is a 16-bit counter. The 16-bit timer has three TCNTs, one for each channel.
Channel
0
1
2
Each TCNT is a 16-bit readable/writable register that counts pulse inputs from a clock source. The
clock source is selected by bits TPSC2 to TPSC0 in TCR.
TCNT0 and TCNT1 are up-counters. TCNT2 is an up/down-counter in phase counting mode and
an up-counter in other modes.
TCNT can be cleared to H'0000 by compare match with GRA or GRB or by input capture to GRA
or GRB (counter clearing function).
When TCNT overflows (changes from H'FFFF to H'0000), the OVF flag is set to 1 in TISRC of
the corresponding channel.
When TCNT underflows (changes from H'0000 to H'FFFF), the OVF flag is set to 1 in TISRC of
the corresponding channel.
Rev. 4.00 Jan 26, 2006 page 350 of 938
REJ09B0276-0400
Bit
Initial value
Read/Write
Timer Counters (TCNT)
Description
[Clearing condition]
Read OVF0 when OVF0 =1, then write 0 in OVF0.
[Setting condition]
TCNT0 overflowed from H'FFFF to H'0000.
Abbreviation
TCNT0
TCNT1
TCNT2
R/W
15
0
R/W
14
0
R/W
13
0
R/W
12
0
R/W
11
0
Function
Up-counter
Phase counting mode: up/down-counter
Other modes: up-counter
R/W
10
0
R/W
9
0
R/W
8
0
R/W
7
0
R/W
6
0
R/W
5
0
R/W
4
0
R/W
3
0
R/W
2
0
(Initial value)
R/W
1
0
R/W
0
0