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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 4-11. Block Diagram of P15<br />

PU1<br />

PU15<br />

Alternate<br />

function<br />

P1<br />

Output latch<br />

(P15)<br />

PM1<br />

PM15<br />

Alternate<br />

function<br />

(TO15)<br />

Alternate<br />

function<br />

(RTC1HZ)<br />

Alternate<br />

function<br />

(LTxD0)<br />

LCD controller/driver<br />

LCDPF1<br />

PF15<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 />

P15/TI15/TO15/<br />

LTxD0/RTC1HZ/<br />

SEG23<br />

Caution When using the alternate function TO15, set the port latch to 0.<br />

When using the alternate function LTxD0, set the port latch to 1.<br />

When using P15 as a general-purpose port, specify the port settings so that the alternate function<br />

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

R01UH0317EJ0004 Rev. 0.04 158<br />

Feb. 22, 2013<br />

EVDD<br />

P-ch

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