DF71251AD50FPV Renesas Electronics America, DF71251AD50FPV Datasheet - Page 515

• 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: -

13.4.5
The A/D converter can be independently activated by an A/D conversion request from the interval
timer of the MTU2.
To activate the A/D converter by the MTU2, first set the TRGE bit in the A/D control/status
register (ADCSR) to 1, and then set the A/D trigger select register (ADTSR). After this register
setting has been made, the ADST bit in ADCR is automatically set to 1 when an A/D conversion
request from the interval timer of the MTU2 occurs. The timing from setting of the ADST bit until
the start of A/D conversion is the same as when 1 is written to the ADST bit by software.
13.4.6
A/D conversion can be externally triggered. When the TRGE bit in the A/D control/status register
(ADCSR) is set to 1 while the TRGS3 to TRGS0 bits in the A/D trigger select register_0
(ADTSR_0) is set to external trigger input, external trigger input is enabled at the ADTRG pin. A
falling edge of the ADTRG pin sets the ADST bit to 1 in ADCR, starting A/D conversion. Other
operations, in both single and scan modes, are the same as when the ADST bit has been set to 1 by
software. Figure 13.3 shows the timing.
CK
ADTRG
External trigger
signal
ADST
A/D Converter Activation by MTU2
External Trigger Input Timing
Figure 13.3 External Trigger Input Timing
Rev. 5.00 Mar. 06, 2009 Page 495 of 770
A/D conversion
REJ09B0243-0500