User's Manual

solid lines. Recommended and optional connections are illustrated with different dotted

and dashed line patterns. They are also listed below.

For more detail on pin characteristics and behaviors, see the RS500 Hardware User’s

Guide.

Figure 3-1: Example RS500 Block Diagram

Required connections:

 VDC_IN and GND are required to power the RS500.

 RF is required to connect to the UHF RFID antenna.

 UART1 Tx and Rx are required to communicate with the system host.

Recommended connections:

 nRST is used to reset the RS500 if UART communication is not available. This

connection is highly recommended. This pin internally driven strong low during

software resets, so it should only be driven externally by an open drain signal. It

must not be driven strong high.

 UART2 Tx and Rx may be used to examine debug information.

 HEALTH indicates successful operation of the RS500. Connection to an LED

provides a visual indication of whether or not an error condition exists.

 STATUS provides an indication when the RS500 is in active mode (for example,

inventorying tags). Connection to an LED provides a visual indicator of the device’s

activity.

Optional connections:

3.6 - 5.25 V

VDC_IN

UART1 RX & TX

GND

Indy

RS500

SiP

NRST

WKUP

Host

GPIOs

Key

Required

Recommended

Test

Points

User

Def.

Optional

STATUS

HEALTH

UART2

GPIOs

UC_ADC

UC_DAC