Ublox MAX-7C-0 Manual

Contents

Ublox MAX-7C-0 Manual Manual pdf 14 page image

MAX-7 / NEO-7 - Hardware Integration ManualUBX-13003704 - R09 Production Information Hardware descriptionPage 14 of 522.7.4 TX Ready signalThe TX Ready signal indicates that the receiver has data to transmit. A listener can wait on the TX Ready signalinstead of polling the DDC or SPI interfaces. The UBX-CFG-PRT message lets you configure the polarity and thenumber of bytes in the buffer before the TX Ready signal goes active. The TX Ready signal can be mapped toUART TXD (PIO 06). The TX Ready function is disabled by default.The TX-ready functionality can be enabled and configured by proper AT commands sent to the involvedu-blox cellular module supporting the feature. For more information see GPS Implementation and AidingFeatures in u-blox wireless modules [10].2.7.5 ANT_ON: Antenna ON (LNA enable) (NEO-7N, MAX-7Q, MAX-7C)In Power Save Mode, the system can turn on/off an optional external LNA using the ANT_ON signal in order tooptimize power consumption. A pull-down resistor (10 kOhm) is required to ensure correct operation in backupmode of the ANT_ON signal.2.7.6 Antenna Short circuit detection (MAX-7W)The MAX-7W module includes internal short circuit antenna detection. For more information, see section3.4.3.2.2.7.7 Antenna open circuit detection2.7.7.1 Antenna open circuit detection (MAX-7)Antenna open circuit detection (OCD) is not activated by default on the MAX-7 module. OCD can be mapped toPIO13 (EXTINT). For more information about how to implement OCD, see section 3.4.3.3. To learn how toconfigure OCD see the u-blox 7 Receiver Description including Protocol Specification [4].2.7.8 Time pulseA configurable time pulse signal is available with all u-blox 7 modules. By default, the time pulse signal isconfigured to 1 pulse per second. For more information see the u-blox 7 Receiver Description including ProtocolSpecification [4].