DF61657CN35FTV Renesas Electronics America, DF61657CN35FTV Datasheet - Page 542

• Manufacturer Part Number: DF61657CN35FTV
• Description: IC H8SX/1657 MCU FLASH 120TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8SX/1600r

Specifications of DF61657CN35FTV

• Core Processor: H8SX
• Core Size: 32-Bit
• Speed: 35MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, PWM, WDT
• Number Of I /o: 82
• Program Memory Size: 768KB (768K x 8)
• Program Memory Type: FLASH
• Ram Size: 24K 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: 120-TQFP, 120-VQFP
• For Use With: 3DK1657 - DEV EVAL KIT FOR H8SX/1657
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Section 12 8-Bit Timers (TMR)
12.3.1
TCNT is an 8-bit readable/writable up-counter. TCNT_0 and TCNT_1 comprise a single 16-bit
register so they can be accessed together by a word transfer instruction. Bits CKS2 to CKS0 in
TCR and bits ICKS1 and ICKS0 in TCCR are used to select a clock. TCNT can be cleared by an
external reset input signal, compare match A signal, or compare match B signal. Which signal is to
be used for clearing is selected by bits CCLR1 and CCLR0 in TCR. When TCNT overflows from
H'FF to H'00, bit OVF in TCSR is set to 1. TCNT is initialized to H'00.
12.3.2
TCORA is an 8-bit readable/writable register. TCORA_0 and TCORA_1 comprise a single 16-bit
register so they can be accessed together by a word transfer instruction. The value in TCORA is
continually compared with the value in TCNT. When a match is detected, the corresponding
CMFA flag in TCSR is set to 1. Note however that comparison is disabled during the T2 state of a
TCORA write cycle. The timer output from the TMO pin can be freely controlled by this compare
match signal (compare match A) and the settings of bits OS1 and OS0 in TCSR. TCORA is
initialized to H'FF.
Rev. 2.00 Jun. 28, 2007 Page 516 of 864
REJ09B0341-0200
Bit
Bit Name
Initial Value
R/W
Bit
Bit Name
Initial Value
R/W
Timer Counter (TCNT)
Time Constant Register A (TCORA)
R/W
R/W
7
0
7
1
R/W
R/W
6
0
6
1
R/W
R/W
5
0
5
1
TCORA_0
R/W
R/W
TCNT_0
4
0
4
1
R/W
R/W
3
0
3
1
R/W
R/W
2
0
2
1
R/W
R/W
1
0
1
1
R/W
R/W
0
0
0
1
R/W
R/W
7
0
7
1
R/W
R/W
6
0
6
1
R/W
R/W
5
0
5
1
R/W
TCORA_1
R/W
TCNT_1
4
0
4
1
R/W
R/W
3
0
3
1
R/W
R/W
2
0
2
1
R/W
R/W
1
0
1
1
R/W
R/W
0
0
0
1