DF2556FC20DV Renesas Electronics America, DF2556FC20DV Datasheet - Page 392

• Manufacturer Part Number: DF2556FC20DV
• Description: IC H8S/2556 MCU FLASH 144QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2500r

Specifications of DF2556FC20DV

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: CAN, I²C, SCI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 104
• Program Memory Size: 512KB (512K x 8)
• Program Memory Type: FLASH
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 16x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 144-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Section 10 16-Bit Timer Pulse Unit (TPU)
10.9.3
When counter clearing on compare match is set, TCNT is cleared in the final state in which it
matches the TGR value (the point at which the count value matched by TCNT is updated).
Consequently, the actual counter frequency is given by the following formula:
Where
10.9.4
If the counter clear signal is generated in the T2 state of a TCNT write cycle, TCNT clearing takes
precedence and the TCNT write is not performed.
Figure 10.45 shows the timing in this case.
Rev. 6.00 Sep. 24, 2009 Page 344 of 928
REJ09B0099-0600
f =
φ
Address
Write signal
Counter clear
signal
TCNT
Caution on Period Setting
Contention between TCNT Write and Clear Operations
f
φ : Operating frequency
N : TGR set value
Figure 10.45 Contention between TCNT Write and Clear Operations
(N + 1)
: Counter frequency
φ
N
TCNT write cycle
TCNT address
T1
T2
H'0000