R5F21191SP#U0 Renesas Electronics America, R5F21191SP#U0 Datasheet - Page 45

• Manufacturer Part Number: R5F21191SP#U0
• Description: IC R8C MCU FLASH 8K 20SSOP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/R8C/Tiny/19r

Specifications of R5F21191SP#U0

• Core Processor: R8C
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SIO, UART/USART
• Peripherals: LED, POR, Voltage Detect, WDT
• Number Of I /o: 13
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: FLASH
• Ram Size: 384 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 4x1b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 20-SSOP
• For Use With: R0K521134S000BE - KIT EVAL STARTER FOR R8C/13R0E521174CPE10 - EMULATOR COMPACT R8C/18/19/1
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/18 Group, R8C/19 Group
Rev.1.30
REJ09B0222-0130
6.
There are 13 programmable Input/Output ports (I/O ports) P1, P3_3 to P3_5, P3_7, and P4_5. P4_2 can be
used as an input-only port. Also, P4_6 and P4_7 can be used as input-only ports if the main clock oscillation
circuit is not used. Table 6.1 lists an Overview of Programmable I/O Ports.
6.1
6.2
6.3
Table 6.1
NOTES:
Table 6.2
NOTE:
Table 6.3
P1
P3_3, P4_5
P3_4, P3_5, P3_7
P4_2, P4_6, P4_7
Reading
Writing
Input
Output
The PDi_j (j=0 to 7) bit in the PDi (i=1, 3, and 4) register controls I/O of ports P1, P3_3 to P3_5, P3_7,
and P4_5. The Pi register consists of a port latch to hold output data and a circuit to read pin states.
Figures 6.1 to 6.3 show the Configurations of Programmable I/O Ports.
Table 6.2 lists the Functions of Programmable I/O Ports. Also, Figure 6.5 shows Registers PD1, PD3,
and PD4. Figure 6.6 shows Registers P1, P3, and P4, Figure 6.7 shows Registers PUR0 and PUR1, and
Figure 6.8 shows the DRR Register.
Programmable I/O ports function as I/O ports for peripheral functions (Refer to Table 1.6 Pin Name
Information by Pin Number of PLSP0020JB-A, PRDP0020BA-A packages). Table 6.3 lists the
Settings of PDi_j Bit when Functioning as I/O Ports for Peripheral Functions. Refer to the description of
each function for information on how to set peripheral functions.
Figure 6.4 shows the Configuration of I/O Pins.
I/O of Peripheral Functions
Operation when
Programmable I/O Ports
1. In input mode, whether an internal pull-up resistor is connected or not can be selected by registers PUR0 and
2. These ports can be used as the LED drive port by setting the DRR register to 1 (high).
3. When the main clock oscillation circuit is not used, P4_6 and P4_7 can be used as input-only ports.
1. Nothing is assigned to bits PD3_0 to PD3_2, PD3_6, PD4_0 to PD4_4, PD4_6, and PD4_7.
Pi Register
Accessing
PUR1.
Functions of Programmable I/O Ports
Effect on Peripheral Functions
Pins Other than Programmable I/O Ports
Ports
Apr 14, 2006
Overview of Programmable I/O Ports
Functions of Programmable I/O Ports
Settings of PDi_j Bit when Functioning as I/O Ports for Peripheral Functions
(3)
Read pin input level
Write to the port latch
I/O
I/O
I/O
I
When PDi_j Bit is Set to 0 (Input Mode)
I/O
Page 28 of 233
CMOS3 State
CMOS3 State
CMOS3 State
(No output function)
Set this bit to 0 (input mode).
This bit can be set to either 0 or 1 (output regardless of the port setting).
Type of Output
Value of PDi_j Bit in PDi Register
PPDi_j Bit Settings for Shared Pin Functions
Set per bit
Set per bit
Set per bit
None
I/O Setting
Read the port latch
Write to the port latch. The value written to the
port latch is output from the pin.
Set every 4 bits
Set every bit
Set every 3 bits
None
When PDi_j Bit is Set to 1 (Output Mode)
Internal Pull-Up
Resistor
(1)
(1)
(1)
(1)
6. Programmable I/O Ports
Set every bit
to P1_3
None
None
None
Drive Capacity
Selection
(2)
of P1_0