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RL78/D1A User's Manual: Hardware - Renesas

RL78/D1A User's Manual: Hardware - Renesas

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Under development<br />

Preliminary document<br />

Specifications in this document are tentative and subject to change.<br />

<strong>RL78</strong>/<strong>D1A</strong> CHAPTER 4 PORT FUNCTIONS<br />

4.2.13 Port 14 (100-pin products only)<br />

P140 is a 1-bit I/O port with an output latch. P140 can be set to the input mode or output mode using port mode register<br />

14 (PM14). When the P140 pin is used as an input port, use of an on-chip pull-up resistor can be specified by pull-up<br />

resistor option register 14 (PU14).<br />

This pin also functions as timer I/O.<br />

To use P140 as the port function, refer Table 4-13.<br />

Table 4-13. Setting of P140 Pin to port function<br />

P140 Pin LCDPF14 Alternate function<br />

port function<br />

Register<br />

Timer Serial<br />

P140<br />

PM14<br />

Register<br />

Input port N/A<br />

- N/A Input mode<br />

Output port<br />

Reset signal generation sets port 14 to input mode.<br />

Figure 4-49 shows block diagrams of port 14.<br />

0<br />

Output mode<br />

PIM<br />

Register<br />

N/A N/A<br />

POM<br />

Register<br />

Remarks<br />

R01UH0317EJ0004 Rev. 0.04 205<br />

Feb. 22, 2013

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