DF2398F20V Renesas Electronics America, DF2398F20V Datasheet - Page 418

• Manufacturer Part Number: DF2398F20V
• Description: IC H8S/2300 MCU FLASH 128QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of DF2398F20V

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 87
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K 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: 128-QFP
• For Use With: YR0K42378FC000BA - KIT EVAL FOR H8S/2378
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

10.4.7
In phase counting mode, the phase difference between two external clock inputs is detected and TCNT is
incremented/decremented accordingly. This mode can be set for channels 1, 2, 4, and 5.
When phase counting mode is set, an external clock is selected as the counter input clock and TCNT operates as an
up/down-counter regardless of the setting of bits TPSC2 to TPSC0 and bits CKEG1 and CKEG0 in TCR. However, the
functions of bits CCLR1 and CCLR0 in TCR, and of TIOR, TIER, and TGR are valid, and input capture/compare match
and interrupt functions can be used.
When overflow occurs while TCNT is counting up, the TCFV flag in TSR is set; when underflow occurs while TCNT is
counting down, the TCFU flag is set.
The TCFD bit in TSR is the count direction flag. Reading the TCFD flag provides an indication of whether TCNT is
counting up or down.
Table 10-8 shows the correspondence between external clock pins and channels.
Table 10-8 Phase Counting Mode Clock Input Pins
Example of Phase Counting Mode Setting Procedure: Figure 10-28 shows an example of the phase counting mode
setting procedure.
Examples of Phase Counting Mode Operation: In phase counting mode, TCNT counts up or down according to the
phase difference between two external clocks. There are four modes, according to the count conditions.
Rev.6.00 Oct.28.2004 page 388 of 1016
REJ09B0138-0600H
Phase counting mode 1
Figure 10-29 shows an example of phase counting mode 1 operation, and table 10-9 summarizes the TCNT up/down-
count conditions.
Phase Counting Mode
Channels
When channel 1 or 5 is set to phase counting mode
When channel 2 or 4 is set to phase counting mode
Select phase counting mode
<Phase counting mode>
Phase counting mode
Figure 10-28 Example of Phase Counting Mode Setting Procedure
Start count
[1]
[2]
[1] Select phase counting mode with bits MD3 to
[2] Set the CST bit in TSTR to 1 to start the count
MD0 in TMDR.
operation.
A-Phase
TCLKA
TCLKC
External Clock Pins
B-Phase
TCLKB
TCLKD