HD64F3026X25 Renesas Electronics America, HD64F3026X25 Datasheet - Page 329

• Manufacturer Part Number: HD64F3026X25
• Description: MCU 3V 256K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of HD64F3026X25

• 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: Contains lead / RoHS non-compliant
• Eeprom Size: -

9.4
9.4.1
8TCNT is incremented by input clock pulses (either internal or external).
Internal Clock: Three different internal clock signals ( /8, /64, or /8192) divided from the
system clock ( ) can be selected, by setting bits CKS2 to CKS0 in 8TCR. Figure 9.8 shows the
count timing.
External Clock: Three incrementation methods can be selected by setting bits CKS2 to CKS0 in
8TCR: on the rising edge, the falling edge, and both rising and falling edges.
The pulse width of the external clock signal must be at least 1.5 system clocks when a single edge
is selected, and at least 2.5 system clocks when both edges are selected. Shorter pulses will not be
counted correctly.
Figure 9.9 shows the timing for incrementation on both edges of the external clock signal.
Note: Even if the same internal clock is selected for the 16-bit timer and the 8-bit timer, the same operation
8TCNT input clock
Internal clock
will not be performed since the incrementing edge is different in each case.
Operation
8TCNT Count Timing
8TCNT
Figure 9.8 Count Timing for Internal Clock Input
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Rev. 2.00 Sep 20, 2005 page 289 of 800
Section 9 8-Bit Timers
REJ09B0260-0200
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