ThingMagic Mercury xPRESS, Руководство по платформе, Страница: 109 / 146

A D I V I S I O N O F T R I M B L E
Hardware Reference Guide
109
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UART host to RFID module
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UARTx2 to Comm Bus Interface
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SPI to Comm Bus Interface
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I2C to Comm Bus Interface
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ADC/DAC to Comm Bus Interface
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CAN to Comm Bus Interface
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UART to external USB converter (debug)
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JTAG
These interfaces allow the MCU to control and access a wide range of functionality:
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Control of USB OTG functionality, and whether the USB interface will be powered by
the xPRESS motherboard
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Access and control over module data (TTL UART, not USB), GPIO, reset and
shutdown lines.
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Monitors user-defined switch and drives the power LED and three user-defined LEDs
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Keeps track of time and will not forget it across a power-down reboot if the CR1220
coin cell or charged Li-ion battery is present.
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Monitors critical system voltages (can measure their exact level though A-D
converters).
RFID Module
There are three module options available with the xPRESS platform: an M6e module, a
Micro or a Micro-LTE module.
The Micro-family modules are soldered down to a carrier board which provides access to
M6e-type I/O connectors:
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M6e Power/Control connector
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Two MMCX RF connectors.
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USB type micro-A connector
The Micro carrier board is mounted on a heat spreader (identical to the bottom clam-shell
heat spreader on the M6e), which is then mounted to the xPRESS motherboard. For both
modules, the USB interface is not connected to the MCU, but is accessible though a
micro-A connector. The modules’ GPIO lines are connected to the processor, and