Texas Instruments AFE4490 Evaluation Module AFE4490SPO2EVM AFE4490SPO2EVM Benutzerhandbuch
Produktcode
AFE4490SPO2EVM
AFE44x0SPO2EVM Hardware
5.3
Accessing AFE44x0 Digital Signals
AFE44x0 SPI interface and other digital signals with MSP430 can be accessed through the series resistor
jumpers given in
jumpers given in
Table 4. AFE44x0 Digital Signals
S. No.
Signal
Jumper Resistor
1
STE
R29
2
SIMO
R31
3
SOMI
R33
4
SCLK
R35
5
ADC_RDY
R26
6
PD_ALM
R37
7
LED_ALM
R39
8
DIAG_END
R38
9
AFE_PDNZ
R42
5.4
Analog Inputs
The AFE44x0SPO2EVM gives the user the option to feed in the pulse oximeter simulator signals to the
DB9 connector (J2).
DB9 connector (J2).
For all measurements in this user guide, the ProSim Fluke SPOT Light SpO2 Functional tester was used
as shown in
as shown in
Figure 35. Fluke SPOT Light SpO2 Functional Tester Setup
5.5
USB Interface
The EVM has a mini USB interface for PC application connectivity requiring a standard mini USB to USB
cable for connection. AFE44x0SPO2EVM is designed to work in the slave mode.
cable for connection. AFE44x0SPO2EVM is designed to work in the slave mode.
5.6
On-Board Key Interface
The EVM has 2 switches. The function of each switch is defined in
Table 5. AFE44x0SPO2EVM Switches
Switch Number
Description
SW1
This switch is used for hard reset of the board. The board resets and starts again with the firmware loaded.
SW2
This switch is used to enable boot strap loader (BSL) MSP430 firmware.
30
AFE4400 and AFE4490 Development Guide
SLAU480C – January 2013 – Revised May 2014
Copyright © 2013–2014, Texas Instruments Incorporated