DF71251AD50FPV Renesas Electronics America, DF71251AD50FPV Datasheet - Page 359

• 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: -

9.7.8
When the buffer transfer timing is set at the TCNT clear by the buffer transfer mode register
(TBTM), if TCNT clear occurs in the T2 state of a TGR write cycle, the data that is transferred to
TGR by the buffer operation is the data before write.
Figure 9.112 shows the timing in this case.
Address
Write signal
TCNT clear
signal
Buffer transfer
signal
Buffer register
TGR
Figure 9.112 Contention between Buffer Register Write and TCNT Clear
Contention between Buffer Register Write and TCNT Clear
MPφ
N
TGR write cycle
Buffer register
T1
address
T2
Rev. 5.00 Mar. 06, 2009 Page 339 of 770
M
N
Buffer register write data
REJ09B0243-0500