HD64F2149YV datasheet(277/1075 Pages) RENESAS

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Section 8 I/O Ports

Rev. 3.00 Jan 18, 2006 page 249 of 1044

REJ09B0280-0300

8.11

Port A

8.11.1

Overview

Port A is an 8-bit I/O port. Port A pins also function as keyboard buffer controller I/O pins

(PS2AC, PS2AD, PS2BC, PS2BD, PS2CC, PS2CD), key-sense interrupt input pins (

KIN15 to

KIN8), expansion A/D converter input pins (CIN15 to CIN8), and address output pins (A23 to

A16). Port A pin functions are the same in all operating modes. Figure 8.18 shows the port A pin

configuration.

PA7/A23/

KIN15/CIN15/PS2CD

PA6/A22/

KIN14/CIN14/PS2CC

PA5/A21/

KIN13/CIN13/PS2BD

PA4/A20/

KIN12/CIN12/PS2BC

PA3/A19/

KIN11/CIN11/PS2AD

PA2/A18/

KIN10/CIN10/PS2AC

PA1/A17/

KIN9/CIN9

PA0/A16/

KIN8/CIN8

Port A

Port A pins

PA7 (I/O)/

KIN15 (Input)/CIN15 (Input)/PS2CD (I/O)

PA6 (I/O)/

KIN14 (Input)/CIN14 (Input)/PS2CC (I/O)

PA5 (I/O)/

KIN13 (Input)/CIN13 (Input)/PS2BD (I/O)

PA4 (I/O)/

KIN12 (Input)/CIN12 (Input)/PS2BC (I/O)

PA3 (I/O)/

KIN11 (Input)/CIN11 (Input)/PS2AD (I/O)

PA2 (I/O)/

KIN10 (Input)/CIN10 (Input)/PS2AC (I/O)

PA1 (I/O)/

KIN9 (Input)/CIN9 (Input)

PA0 (I/O)/

KIN8 (Input)/CIN8 (Input)

Pin functions in mode 1, mode 2 (EXPE = 0), and mode 3

PA7 (I/O)/A23 (Output)/

KIN15 (Input)/CIN15 (Input)/PS2CD (I/O)

PA6 (I/O)/A22 (Output)/

KIN14 (Input)/CIN14 (Input)/PS2CC (I/O)

PA5 (I/O)/A21 (Output)/

KIN13 (Input)/CIN13 (Input)/PS2BD (I/O)

PA4 (I/O)/A20 (Output)/

KIN12 (Input)/CIN12 (Input)/PS2BC (I/O)

PA3 (I/O)/A19 (Output)/

KIN11 (Input)/CIN11 (Input)/PS2AD (I/O)

PA2 (I/O)/A18 (Output)/

KIN10 (Input)/CIN10 (Input)/PS2AC (I/O)

PA1 (I/O)/A17 (Output)/

KIN9 (Input)/CIN9 (Input)

PA0 (I/O)/A16 (Output)/

KIN8 (Input)/CIN8 (Input)

Pin functions in mode 2 (EXPE = 1)

Figure 8.18 Port A Pin Functions

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