HD64F2149YV datasheet(244/1075 Pages) RENESAS

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Section 8 I/O Ports

Rev. 3.00 Jan 18, 2006 page 216 of 1044

REJ09B0280-0300

8.4

Port 3

8.4.1

Overview

Port 3 is an 8-bit I/O port. Port 3 pins also have host interface (LPC) input/output (SERIRQ,

LCLK,

LRESET, LFRAME, LAD3 to LAD0), host interface (XBS) data bus input/output (HDB7

to HDB0), and as data bus I/O pins. Port 3 functions change according to the operating mode. Port

3 has a built-in MOS input pull-up function that can be controlled by software.

Figure 8.9 shows the port 3 pin configuration.

P37/D15/HDB7/SERIRQ

P36/D14/HDB6/LCLK

P35/D13/HDB5/

LRESET

P34/D12/HDB4/

LFRAME

P33/D11/HDB3/LAD3

P32/D10/HDB2/LAD2

P31/D9/HDB1/LAD1

P30/D8/HDB0/LAD0

Port 3

Port 3 pins

D15 (I/O)

D14 (I/O)

D13 (I/O)

D12 (I/O)

D11 (I/O)

D10 (I/O)

D9 (I/O)

D8 (I/O)

Pin functions in modes 1, 2 and 3 (EXPE = 1)

P37 (I/O)/HDB7 (I/O)/SERIRQ (I/O)

P36 (I/O)/HDB6 (I/O)/LCLK (Input)

P35 (I/O)/HDB5 (I/O)/

LRESET (Input)

P34 (I/O)/HDB4 (I/O)/

LFRAME (Input)

P33 (I/O)/HDB3 (I/O)/LAD3 (I/O)

P32 (I/O)/HDB2 (I/O)/LAD2 (I/O)

P31 (I/O)/HDB1 (I/O)/LAD1 (I/O)

P30 (I/O)/HDB0 (I/O)/LAD0 (I/O)

Pin functions in modes 2 and 3 (EXPE = 0)

Figure 8.9 Port 3 Pin Functions

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