R5F21356CNFP#U0 Renesas Electronics America, R5F21356CNFP#U0 Datasheet - Page 146

• Manufacturer Part Number: R5F21356CNFP#U0
• Description: MCU 1KB FLASH 32K ROM 52-LQFP
• Manufacturer: Renesas Electronics America
• Series: R8C/3x/35Cr

Specifications of R5F21356CNFP#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: 47
• 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: 52-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/35C Group
REJ09B0567-0100 Rev.1.00 Dec. 14, 2009
Page 113 of 725
7.6
Figure 7.18
Table 7.66
Notes:
Ports P0, P1, P2, P3,
P4_3 to P4_7, P5_6, P5_7, P6
Port P4_2/VREF
RESET
Table 7.66 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.
Port P0, P1, P2, P3,
P5_6, P5_7, P6
• 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
P4_3 to P4_7,
(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)