DF3026X25V Renesas Electronics America, DF3026X25V Datasheet - Page 316

• Manufacturer Part Number: DF3026X25V
• Description: MCU 3V 256K PB-FREE 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of DF3026X25V

• 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: Lead free / RoHS Compliant
• Eeprom Size: -

Section 9 8-Bit Timers
9.2
9.2.1
Initial value
Read/Write
Initial value
Read/Write
The timer counters (8TCNT) are 8-bit readable/writable up-counters that increment on pulses
generated from an internal or external clock source. The clock source is selected by clock select
bits 2 to 0 (CKS2 to CKS0) in the timer control register (8TCR). The CPU can always read or
write to the timer counters.
The 8TCNT0 and 8TCNT1 pair, and the 8TCNT2 and 8TCNT3 pair, can each be accessed as a
16-bit register by word access.
8TCNT can be cleared by an input capture signal or compare match signal. Counter clear bits 1
and 0 (CCLR1 and CCLR0) in 8TCR select the method of clearing.
When 8TCNT overflows from H'FF to H'00, the overflow flag (OVF) in the timer control/status
register (8TCSR) is set to 1.
Each 8TCNT is initialized to H'00 by a reset and in standby mode.
Rev. 2.00 Sep 20, 2005 page 276 of 800
REJ09B0260-0200
Bit
Bit
Register Descriptions
Timer Counters (8TCNT)
R/W
R/W
15
15
0
0
R/W
R/W
14
14
0
0
R/W
R/W
13
13
0
0
R/W
R/W
8TCNT0
8TCNT2
12
12
0
0
R/W
R/W
11
11
0
0
R/W
R/W
10
10
0
0
R/W
R/W
9
0
9
0
R/W
R/W
8
0
8
0
R/W
R/W
7
0
7
0
R/W
R/W
6
0
6
0
R/W
R/W
5
0
5
0
R/W
R/W
8TCNT1
8TCNT3
4
0
4
0
R/W
R/W
3
0
3
0
R/W
R/W
2
0
2
0
R/W
R/W
1
0
1
0
R/W
R/W
0
0
0
0