R5F21346CNFP#U0 Renesas Electronics America, R5F21346CNFP#U0 Datasheet - Page 144

• Manufacturer Part Number: R5F21346CNFP#U0
• Description: MCU 1KB FLASH 32K ROM 48-LQFP
• Manufacturer: Renesas Electronics America
• Series: R8C/3x/34Cr

Specifications of R5F21346CNFP#U0

• Core Processor: R8C
• Core Size: 16/32-Bit
• Speed: 20MHz
• Connectivity: I²C, LIN, SIO, SSU, UART/USART
• Peripherals: POR, PWM, Voltage Detect, WDT
• Number Of I /o: 43
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 2.5K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 12x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/34C Group
REJ09B0586-0100 Rev.1.00 Jan 13, 2010
Page 111 of 723
7.6
Figure 7.17
Table 7.62
Notes:
Ports P0 to P2, P3_0 and P3_1,
P3_3 to P3_5, P3_7, P4_3 to
P4_7, P6
Port P4_2/VREF
RESET
Table 7.62 lists Unassigned Pin Handling.
1. If these ports are set to output mode and left open, they remain in input mode until they are switched
2. Connect these unassigned pins to the MCU using the shortest wire length (2 cm or less) possible.
3. When the power-on reset function is in use.
to output mode by a program. The voltage level of these pins may be undefined and the power
current may increase while the ports remain in input mode.
The content of the direction registers may change due to noise or program runaway caused by
noise. In order to enhance program reliability, the program should periodically repeat the setting of
the direction registers.
Unassigned Pin Handling
(3)
Pin Name
Unassigned Pin Handling
Unassigned Pin Handling
Note:
1. When the power-on reset function is in use.
P3_3 to P3_5, P3_7,
P4_3 to P4_7, P6
P3_0 and P3_1,
• After setting to input mode, connect each pin to VSS via a resistor
• After setting to output mode, leave these pins open.
Connect to VCC
Connect to VCC via a pull-up resistor
Port P0 to P2,
(pull-down) or connect each pin to VCC via a resistor (pull-up).
MCU
Port P4_2/VREF
(Output mode)
(Input mode )
(Input mode)
RESET
:
:
(1)
Open
:
:
Connection
(2)
(1, 2)
7. I/O Ports
(2)