RL78/F13, F14 CHAPTER 4 PORT FUNCTIONS
R01UH0368EJ0210 Rev.2.10 236
Dec 10, 2015
4.2.5 Port 5
Port 5 is an I/O port with an output latch. Port 5 can be set to the input mode or output mode in 1-bit units using port
mode register 5 (PM5). When the P50 to P57 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 5 (PU5).
Input to the P54 pin can be specified through a normal input buffer or a TTL input buffer in 1-bit units using port input
mode register 5 (PIM5).
For the P50 and P52 to P54 pin input, the threshold of the input buffer can be specified in 1-bit units using the port input
threshold control register 5 (PITHL5).
This port can also be used for external interrupt request input, serial interface data I/O, clock I/O, slave select input,
timer I/O, STOP status output, and SNOOZE status output.
Reset signal generation sets this port to input mode.
Table 4-9. Settings of Registers When Using Port 5 (1/2)
Pin Name PM5x PIM5x PITHL5x Alternate Function Setting
Note 6
Remark
Name I/O
P50 Input 1 – 0 × CMOS input
(Schmitt1 input)
1 CMOS input
(Schmitt3 input)
Output 0 – × ×
P51 Input 1 – – ×
Output 0 – – (SO01 output = 1)
Note 1
P52 Input 1 – 0 × CMOS input
(Schmitt1 input)
1 CMOS input
(Schmitt3 input)
Output 0 – × (SCK01 output = 1)
Note 2
(STOPST output = 0)
Note 5
P53 Input 1 – 0 × CMOS input
(Schmitt1 input)
1 CMOS input
(Schmitt3 input)
Output 0 – × ×
P54 Input 1 0 0 × CMOS input
(Schmitt1 input)
1 CMOS input
(Schmitt3 input)
1 × × TTL input
Output 0 × × (TO11 output = 0)
Note 3
(Notes and Remark are listed on the next page.)
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