F20 datasheet(77/111 Pages) ETC2

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Boxchip F20 Datasheet

Ver 1.01

Page 77

19.

PS/2 Interface

19.1.

PS/2 Interface Overview

The PS/2 is a Dual-Role controller, which supports both device and host functions and is full

compliant with IBM PS/2 in Personal Computer. It can be configured as a Host to connect

PS/2 Keyboard or PS/2 Mouse; it can also be configured as Device to connect Computer.

The PS/2 module can be integrated with industry-standard AMBA Peripheral Bus (APB) for

communication with other system modules, such as ARM CPU, System Memory.

The PS/2 Module includes the following features:



Compliance to IBM PS/2 and AT-Compatible Keyboard and Mouse Interface



Dual Role Controller, it can be either a PS/2 Host or a PS/2 Device



4-byte TXFIFO and 4-byte RXFIFO for data buffering



Odd parity generation and checking



Internal Clock Divider for Simple Clock Interface

19.2.

PS/2 Controller Signal Description

Table 19-1. PS/2 Controller Signal Description

Signal

Name

Description

Type

Name

Ball#

PS/2 port 0

PS2_SCK0

PS/2 Clock

I/O

PB18

PE24

PS2_SDA0

PS/2 Data

I/O

PB19

PE25

PS/2 port 1

PS2_SCK1

PS/2 Clock

I/O

PH12

PS2_SDA1

PS/2 Data

I/O

PH13

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