DF71251AD50FPV Renesas Electronics America, DF71251AD50FPV Datasheet - Page 311

• 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: -

14. Output Waveform Control at Synchronous Counter Clearing in Complementary PWM Mode
Negative phase
Positive phase
Setting the WRE bit in TWCR to 1 suppresses initial output when synchronous counter
clearing occurs in the Tb interval at the trough in complementary PWM mode and controls
abrupt change in duty cycle at synchronous counter clearing.
Initial output suppression is applicable only when synchronous clearing occurs in the Tb
interval at the trough as indicated by (10) or (11) in figure 9.56. When synchronous clearing
occurs outside that interval, the initial value specified by the OLS bits in TOCR is output.
Even in the Tb interval at the trough, if synchronous clearing occurs in the initial value output
period (indicated by (1) in figure 9.56) immediately after the counters start operation, initial
value output is not suppressed.
In the MTU2, synchronous clearing generated in channels 0 to 2 in the MTU2 can cause
counter clearing.
Counter start
TGRA_3
TGRB_3
H'0000
TCDR
TDDR
Tb interval
(1)
Figure 9.56 Timing for Synchronous Counter Clearing
(2)
(3)
(4)
Tb interval
(5)
(6)
(7)
(8)
(9)
Rev. 5.00 Mar. 06, 2009 Page 291 of 770
Tb interval
(10) (11)
Output waveform is active-low
TCNT_3
REJ09B0243-0500
TCNT_4