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Connector Interface
8.3
8-Pin Connector
The 8-pin connector pin-outs are shown in
Figure 41
. The description is provided in
Table 7
.
Figure 41. 8-Pin Connector
Table 7. 8-Pin Connector Pin Descriptions
Pin
Pin Name
Pin Description
Number
1
LED_DRV_SUP
LED driver supply pin. Connected to anode of LED3(1)
2
TX_3
Cathode of LED3(1)
3
TX_P
Anode of LED1, cathode of LED2(1)
4
TX_N
Cathode of LED1, anode of LED2(1)
5
GND
Ground
6
DET_N
Photodiode anode
7
DET_P
Photodiode cathode
8
VCM
Common-mode voltage output
9
AFE4403EVM Reflective Sensing Quick Start Guide
Use the following steps as a quick start guide for AFE4403EVM reflective sensing:
1. Update the MSP430 firmware:
(a) Download the
AFE4403EVM GUI
from the TI website, (
http://www.ti.com/tool/AFE4403EVM
)
(b) Run
AFE4403EVM GUI
which is found in the chosen installation directory (by default this is
ROOT:\Program Files (x86)\Texas Instruments\AFE4403SPO2EVM GUI).
(c) Click on
File
at the top left of the window followed by
Firmware Upgrade
. A window pops up, click
the
Continue
button.’
(d) Click the
Browse
button and choose the desired hex file. This file should have a
.txt
extension
(example: AFE4403_EVM_FW_V2.1.txt).
2. Test setup:
(a) Each sensor board has two different configurations:
•
The NJRC NJL5310R sensor board has two green LEDs that can be connected in parallel or
back to back. RA1 and RA2 connects them in parallel and RB1 and RB2 connects them back
to back, as shown in
Figure 42
. Note that when in parallel, both LEDs represent LED2 and
when back to back, one represents LED1 and the other LED2. This board does not support
TX3 mode.
37
SLAU572B – June 2014 – Revised July 2014
AFE4403 Development Guide
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