Specifications

Table Of Contents

Enabling the Multiplexer

Software Configuration 27

Table 4-1 describes the timing components shown in Figure 4-1.

Table 4-1 T

iming Components

Designator Time (ms) Description

A 6

Send Change Port command

B 1.5

Firmware delay to change port

C 2

Receive Change Port response

D 3.5

Send Select Tag command for Gen2 tags, Inventory

mode

E 130

Firmware delay to perform actual tag selection

and to receive response

Enabling the Multiplexer

Writing to the default MUX Control system parameter enables or disables the

multiplexer.

To set up communications:

1. Set up the hardware connections as described in ‘‘Hardware

Configuration’’ on page 21.

2. Use SkyeWare to send a Store Default System Parameter command to the

eader for the MUX Control parameter. The data value determines the

multiplexer setting:

● 0x02 enables the multiplexer on GPIO pins 0, 1, and 2 on the host

interface board. In this state, you can still access GPIO pins 3, 4, 5, and

6 through the User Port system parameter.

● 0x01 enables the multiplexer on GPIO pins 4, 5, and 6. In this state,

you can still access GPIO pins 0, 1, 2, and 3 through the User Port

system parameter.

● 0x00 disables the multiplexer. In this state, you can access all GPIO

pins (0–6) through the User Port system parameter.