DF71251AD50FPV Renesas Electronics America, DF71251AD50FPV Datasheet - Page 355

• Manufacturer Part Number: DF71251AD50FPV
• Description: MCU RISC FLASH 32K 8K 64LQFP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH Tinyr

Specifications of DF71251AD50FPV

• Core Processor: SH-2
• Core Size: 32-Bit
• Speed: 50MHz
• Connectivity: SCI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 37
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

9.7.3
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:
• Channels 0 to 4
• Channel 5
Where
9.7.4
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 9.108 shows the timing in this case.
f =
f =
Caution on Period Setting
Contention between TCNT Write and Clear Operations
f:
MPφ:
N:
Figure 9.108 Contention between TCNT Write and Clear Operations
(N + 1)
MPφ
MPφ
MPφ
MPφ
Address
Address
Write signal
Write signal
Counter clear
Counter clear
signal
signal
TCNT
TCNT
N
Counter frequency
MTU2 peripheral clock operating frequency
TGR set value
TCNT write cycle
TCNT write cycle
N
N
TCNT address
TCNT address
T1
T1
T2
T2
Rev. 5.00 Mar. 06, 2009 Page 335 of 770
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