DF71251AD50FPV Renesas Electronics America, DF71251AD50FPV Datasheet - Page 265

• 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: -

9.4.3
Buffer operation, provided for channels 0, 3, and 4, enables TGRC and TGRD to be used as buffer
registers. In channel 0, TGRF can also be used as a buffer register.
Buffer operation differs depending on whether TGR has been designated as an input capture
register or as a compare match register.
Note: TGRE_0 cannot be designated as an input capture register and can only operate as a
Table 9.43 shows the register combinations used in buffer operation.
Table 9.43 Register Combinations in Buffer Operation
• When TGR is an output compare register
Channel
0
3
4
When a compare match occurs, the value in the buffer register for the corresponding channel is
transferred to the timer general register.
This operation is illustrated in figure 9.14.
compare match register.
Buffer Operation
register
Buffer
Figure 9.14 Compare Match Buffer Operation
Timer General Register
TGRA_0
TGRB_0
TGRE_0
TGRA_3
TGRB_3
TGRA_4
TGRB_4
Compare match signal
Timer general
register
Comparator
Rev. 5.00 Mar. 06, 2009 Page 245 of 770
Buffer Register
TGRC_0
TGRD_0
TGRF_0
TGRC_3
TGRD_3
TGRC_4
TGRD_4
TCNT
REJ09B0243-0500