R5F21294SNSP#U0 Renesas Electronics America, R5F21294SNSP#U0 Datasheet - Page 88

• Manufacturer Part Number: R5F21294SNSP#U0
• Description: MCU 3/5V 16K+2K 20PIN-SSOP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/R8C/Tiny/29r

Specifications of R5F21294SNSP#U0

• Core Processor: R8C
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: I²C, LIN, SIO, SSU, UART/USART
• Peripherals: LED, POR, Voltage Detect, WDT
• Number Of I /o: 13
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.2 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 20-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/28 Group, R8C/29 Group
Rev.2.10
REJ09B0279-0210
7.5
Figure 7.12
Table 7.26
NOTES:
Ports P1, P3_3 to P3_5, P3_7,
P4_5
Ports P4_6, P4_7
Port P4_2/VREF
RESET
Table 7.26 lists the 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
Sep 26, 2008
(3)
Pin Name
Unassigned Pin Handling
Unassigned Pin Handling
Page 69 of 441
NOTE:
1. When the power-on reset function is in use.
P3_3 to P3_5, P3_7,
• 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 via a pull-up resistor
Connect to VCC
Connect to VCC via a pull-up resistor
(pull-down) or connect each pin to VCC via a resistor (pull-up).
Port P1,
MCU
P4_5,
Port P4_6, P4_7
Port P4_2/VREF
(Output mode)
(Input mode )
(Input mode)
RESET
:
:
(1)
Open
:
:
Connection
(2)
(2)
7. Programmable I/O Ports
(1, 2)
(2)