DF2345TE20 Renesas Electronics America, DF2345TE20 Datasheet - Page 408

• Manufacturer Part Number: DF2345TE20
• Description: MCU 5V 128K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of DF2345TE20

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SCI, SmartCard
• Peripherals: POR, PWM, WDT
• Number Of I /o: 71
• 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-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Other names: HD64F2345TE20; HD64F2345TE20

Section 10 8-Bit Timers
10.3
10.3.1
TCNT 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 TCR. Figure 10.2 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 10.3 shows the timing of incrementation at both edges of an external clock signal.
Rev. 4.00 Feb 15, 2006 page 382 of 900
REJ09B0291-0400
Internal clock
Clock input
to TCNT
TCNT
Operation
TCNT Incrementation Timing
Figure 10.2 Count Timing for Internal Clock Input
N–1
N
N+1