DF71251AD50FPV Renesas Electronics America, DF71251AD50FPV Datasheet - Page 422

• 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: -

10.6
10.6.1
When a power-on reset is issued from the watchdog timer (WDT), initialization of the pin function
controller (PFC) sets initial values that select the general input function for the I/O ports.
However, when a power-on reset is issued from the WDT while a pin is being handled as high
impedance by the port output enable (POE), the pin is placed in the output state for one cycle of
the peripheral clock (Pf), after which the function is switched to general input.
This also occurs when a power-on reset is issued from the WDT for pins that are being handled as
high impedance due to short-circuit detection by the MTU2.
Figure 10.5 shows the state of a pin for which the POE input has selected high impedance
handling with the timer output selected when a power-on reset is issued from the WDT.
Rev. 5.00 Mar. 06, 2009 Page 402 of 770
REJ09B0243-0500
Figure 10.5 Pin State when a Power-On Reset is Issued from the Watchdog Timer
Pφ
POE input
Pin state
PFC setting value
Power-on reset by WDT
Usage Note
Pin State when a Power-On Reset is Issued from the Watchdog Timer
Timer output
Timer output
High impedance state
1Pφ cycle
Timer
output
General input
General input