HD64F2149YV datasheet(285/1075 Pages) RENESAS

285 / 1075 page

Section 8 I/O Ports

Rev. 3.00 Jan 18, 2006 page 257 of 1044

REJ09B0280-0300

8.12

Port B

8.12.1

Overview

Port B is an 8-bit I/O port. Port B pins also have host interface (XBS) input/output pins (

CS3,

CS4, HIRQ3, HIRQ4), host interface (LPC) input/output pins (LSCI, LSMI), wakeup event

interrupt input pins (

WUE7 to WUE0), and a data bus input/output function (as D7 to D0). The

pin functions depend on the operating mode.

Figure 8.19 shows the port B pin configuration.

PB7/D7/

WUE7

PB6/D6/

WUE6

PB5/D5/

WUE5

PB4/D4/

WUE4

PB3/D3/

WUE3/CS4

PB2/D2/

WUE2/CS3

PB1/D1/

WUE1/HIRQ4/LSCI

PB0/D0/

WUE0/HIRQ3/LSMI

Port B

Port B pins

D7 (I/O)

D6 (I/O)

D5 (I/O)

D4 (I/O)

D3 (I/O)

D2 (I/O)

D1 (I/O)

D0 (I/O)

Mode 1, modes 2 and 3 (EXPE = 1) when ABW = 0

PB7 (I/O)/

WUE7 (Input)

PB6 (I/O)/

WUE6 (Input)

PB5 (I/O)/

WUE5 (Input)

PB4 (I/O)/

WUE4 (Input)

PB3 (I/O)/

WUE3 (Input)/CS4 (Input)

PB2 (I/O)/

WUE2 (Input)/CS3 (Input)

PB1 (I/O)/

WUE1 (Input)/HIRQ4 (Output)/LSCI (I/O)

PB0 (I/O)/

WUE0 (Input)/HIRQ3 (Output)/LSMI (I/O)

Mode 1, modes 2 and 3 (EXPE = 1) when ABW = 1,

and mode 1, modes 2 and 3 (EXPE = 0)

Figure 8.19 Port B Pin Functions

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