RL78/F13, F14 CHAPTER 4 PORT FUNCTIONS
R01UH0368EJ0210 Rev.2.10 209
Dec 10, 2015
4.2.2 Port 1
Port 1 is an I/O port with an output latch. Port 1 can be set to the input mode or output mode in 1-bit units using port
mode register 1 (PM1). When the P10 to P17 pins are used as an input port, use of an on-chip pull-up resistor can be
specified in 1-bit units by pull-up resistor option register 1 (PU1).
Input to the P10, P11, P13, P14, P16, and P17 pins can be specified through a normal input buffer or a TTL input buffer
in 1-bit units using port input mode register 1 (PIM1).
Output from the P10 to P17 pins can be specified as N-ch open-drain output (EV
DD tolerance) in 1-bit units using port
output mode register 1 (POM1).
Input to the P10, P11, P13, P14, P16, and P17 pins can be specified through an input buffer in 1-bit units using the port
input threshold control register 1 (PITHL1).
This port can also be used for data I/O and clock I/O for serial interfaces (simplified IIC, CSI, and UART), serial data I/O
for LIN, serial data I/O for CAN, real-time clock correction clock output, programming UART I/O, timer I/O, external
interrupt request input, and SNOOZE status output.
Reset signal generation sets this port to input mode.
Table 4-4. Settings of Registers When Using Port 1 (1/3)
Pin name PM1x PIM1x POM1x PITHL1x
Alternate Function Setting
Note 11
Remark
Name I/O
P10 Input 1 0 × 0 × CMOS input
(Schmitt1 input)
1 CMOS input
(Schmitt3 input)
1 × × × TTL input
Output 0 × 0 × SCK10/SCL10 output = 1
Note 1
TO13 output = 0
Note 2
TRJO0 output = 0
Note 3
LTXD1 output = 1
Note 8
CTXD0 output = 1
Note 9
CMOS output
× 1 × N-ch O.D output
P11 Input 1 0 × 0 × CMOS input
(Schmitt1 input)
1 CMOS input
(Schmitt3 input)
1 × × × TTL input
Output 0 × 0 × SDA10 output = 1
Note4
TO12 output = 0
Note2
(TRDIOB0 output = 0)
Note5
CMOS output
× 1 × N-ch O.D output
P12 Input 1 – × – ×
Output 0 – 0 – TO11 output = 0
Note 2
SO10/TxD1 output = 1
Note 4
SNZOUT3 output = 0
Note 7
(TRDIOD0 output = 0)
Note 5
CMOS output
– 1 – N-ch O.D output
(Notes and Remark are listed on the bottom of Table 4-4 Settings of Registers When Using Port 1 (3/3).)
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