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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 />

WRPU<br />

RD<br />

WRPORT<br />

WRPM<br />

WRLCDPF<br />

Figure 4-9. Block Diagram of P12, P13<br />

PU1<br />

PU12, PU13<br />

Alternate<br />

function<br />

P1<br />

Output latch<br />

(P12, P13)<br />

PM1<br />

PM12, PM13<br />

Alternate<br />

function<br />

(TO12, TO13)<br />

Alternate<br />

function<br />

(SO00, SO01)<br />

LCD controller/driver<br />

LCDPF1<br />

PF12, PF13<br />

P1: Port register 1<br />

PU1: Pull-up resistor option register 1<br />

PM1: Port mode register 1<br />

LCDPF1: LCD port function registers 1<br />

RD: Read signal<br />

WRxx: Write signal<br />

P12/SO00/TI12/<br />

TO12/INTP2/SEG29,<br />

P13/SO01/TI13/<br />

TO13/SEG25<br />

Caution When using the alternate function TO12 or TO13, set the port latch to 0.<br />

When using the alternate function SO00 or SO01, set the port latch to 1.<br />

When using P12 or P13 as a general-purpose port, specify the port settings so that the alternate<br />

function outputs are fixed (Timer to 0 and Serial to 1).<br />

R01UH0317EJ0004 Rev. 0.04 156<br />

Feb. 22, 2013<br />

EVDD<br />

P-ch

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