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Connector Interface

Figure 35. PC Application Firmware Upgrade – 5

7 Connector Interface

The following connectors are used for external interface to the AFE44x0 Pulse Oximeter board.

• DB9

• USB mini connector

7.1 DB9 Pulse Oximeter Connector

The DB9 pulse oximeter connector pin-outs are shown in Figure 36. The description of the pin-outs is

provided in Table 6

Figure 36. DB9 Pulse Oximeter Connector Pin Outs

Table 6. DB9 based Pulse Oximeter Connector pinouts

Pin Number Pin Name Pin Description

2 TX_LED_P Anode of the IR LED, cathode of the red LED

3 TX_LED_N Cathode of the IR LED, anode of the red LED

5 DET_N Phototransistor anode

7 GND Cable shield

9 DET_P Phototransistor cathode

SLAU480A–January 2013–Revised February 2013 AFE4400 and AFE4490 Development Guide

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