HD64F2134FA20 Renesas Electronics America, HD64F2134FA20 Datasheet - Page 381

• Manufacturer Part Number: HD64F2134FA20
• Description: IC H8S MCU FLASH 128K 80QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2100r

Specifications of HD64F2134FA20

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: IrDA, SCI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 58
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 80-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

12.3
12.3.1
TCNT is incremented by input clock pulses (either internal or external).
Internal Clock: An internal clock created by dividing the system clock ( ) can be selected by
setting bits CKS2 to CKS0 in TCR. Figure 12.2 shows the count timing.
External Clock: Three incrementation methods can be selected by setting bits CKS2 to CKS0 in
TCR: at the rising edge, the falling edge, and both rising and falling edges.
Note that the external clock pulse width must be at least 1.5 states for incrementation at a single
edge, and at least 2.5 states for incrementation at both edges. The counter will not increment
correctly if the pulse width is less than these values.
Figure 12.3 shows the timing of incrementation at both edges of an external clock signal.
Internal clock
TCNT input
clock
TCNT
Operation
TCNT Incrementation Timing
Figure 12.2 Count Timing for Internal Clock Input
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N
Rev. 4.00 Jun 06, 2006 page 325 of 1004
Section 12 8-Bit Timers
REJ09B0301-0400
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