Texas Instruments AFE881H1, Руководство пользователя

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2 USB2ANY Interface Adapter
The AFE881H1EVM is controlled by a USB2ANY Interface Adapter. A PC runs the software that communicates
with the USB2ANY, which provides the power and digital signals used to communicate with the EVM board.
Connectors on the EVM board are used to connect the required external power supply.
Figure 2-1 shows a
diagram of the connections from the PC to the AFE881H1EVM.
A-to-Mini-B USB
Cable
AFE881H1
GUI
AFE881H1
EVM
Digital
Control
DAC
Output
HART
In / Out
Supply
Selection
ADC
Inputs
30-Pin Ribbon
Cable
3.3 V / 5 V
GPIO
I
2
C / SPI
External
Power Supply
(Optional)
USB2ANY
Figure 2-1. AFE881H1EVM Hardware Setup
2.1 Signal Definitions for J10
Table 2-1 shows the pinout for the 30-pin connector socket used to communicate between the EVM and the
USB2ANY. Be aware that the I
2
C communications lines (I2C_SCL and I2C_SDA1) are not used. Both the
connectors and cables from the USB2ANY to the AFE881H1EVM are keyed to make sure the cable is correctly
connected.
Table 2-1. USB2ANY Connector AFE881H1EVM (J10) Pinout
Pin on J10 Signal Definition
4, 6, 8, 16, 27, 28 GND Ground
11 ALARM
Alarm notification; open drain.
When an alarm occurs, this pin is held low. Otherwise, this pin goes to Hi-Z.
12 CS SPI communication for AFE881H1 chip select
13 MISO SPI communication for AFE881H1 digital output
14 MOSI SPI communication for AFE881H1 digital input
15 3p3V 3.3-V supply voltage
17 CD Carrier detect. A logic high on this pin indicates a valid carrier is present.
18 SCLK SPI communication for AFE881H1 digital clock
19 GPIO1 GPIO1 (unused)
20 GPIO2 GPIO2 (unused)
25 RTS
Request to send.
A logic high on this pin enables the demodulator and disables the modulator.
A logic low on this pin enables the modulator and disables the demodulator.
Do not leave any digital input pins floating.
26 UARTOUT UART data output.
29 RESET
Reset.
A logic low on this pin places the device into power-down mode and resets the device.
Logic high returns the device to normal operation.
Do not leave any digital input pins floating.
30 UARTIN UART data input. Do not leave any digital input pins floating.
1, 2, 3, 5, 7, 9, 10, 21,
22, 23, 24
NC Not connected
USB2ANY Interface Adapter www.ti.com
4 AFE881H1 Evaluation Module SLAU858 – NOVEMBER 2021
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