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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 />

WRZPDS<br />

WRLCDPF<br />

Figure 4-34. Block Diagram of P83, P87<br />

PU8<br />

PU83, PU87<br />

Alternate<br />

function<br />

P8<br />

Output latch<br />

(P83, P87)<br />

PM8<br />

PM83, PM87<br />

Alternate<br />

function<br />

(SM14, SM24)<br />

Alternate<br />

function<br />

(TO07, TO17)<br />

ZPDS0<br />

ZPD1PC, ZPD2PC<br />

LCD controller/driver<br />

LCDPF8<br />

PF83, PF87<br />

ZPD comparator<br />

SMVDD<br />

P8: Port register 8<br />

PU8: Pull-up resistor option register 8<br />

PM8: Port mode register 8<br />

LCDPF8: LCD port function registers 8<br />

ZPDS0: ZPD detection voltage setting register0/ZPD analog input control register<br />

RD: Read signal<br />

WRxx: Write signal<br />

P83/SM14/ZPD14/<br />

TI07/TO07/SEG35,<br />

P87/SM24/ZPD24/<br />

TI17/TO17/SEG39<br />

Caution When using the alternate function SM14, SM18, TO07, or TO17 set the port latch to 0.<br />

When using P83 or P87 as a general-purpose port, specify the port settings so that the alternate<br />

function outputs are fixed 0.<br />

R01UH0317EJ0004 Rev. 0.04 188<br />

Feb. 22, 2013<br />

P-ch

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