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Summary of Contents for USR IOT USR-GPRS232-7S3
- Page 1 USR-GPRS232-7S3 Hardware Manual h.usriot.com USR-GPRS232-7S3 Hardware Manual Jinan USR IOT Technology Limited / 11 www.usriot.com...
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Page 2: Table Of Contents
1.3. Evaluation Kit.................................5 2. Hardware Reference Design............................6 2.1. Power Interface..............................6 2.1.1. DC5-18V..............................6 2.1.2. DC 3.6~4.4V............................... 7 2.2. UART Interface..............................7 2.3. Turn On/Off................................8 2.4. Work/Link Indicator............................... 9 2.5. Audio Interface..............................10 Jinan USR IOT Technology Limited / 11 www.usriot.com... -
Page 3: Hardware Introduction
Work indicator, 1 for normal start POWKEY Turn on/off Turn on’off, default disable. Details refer to chapter 2.3 Power/GND - for module power DC5~16V + for power + for module power, 5-16V power. Vacant for 4V power. Jinan USR IOT Technology Limited / 11 www.usriot.com... -
Page 4: Dimensions
RESET Reset Reset, 0 is valid MIC_P Audio input P Audio signal input MIC_N Audio input N RCV_P Audio output P Audio signal output RCV_N Audio output N 1.2. Dimensions Unit: mm Jinan USR IOT Technology Limited / 11 www.usriot.com... -
Page 5: Evaluation Kit
3) Pay attention to the module direction. One side is pin11, the other side is pin 12, should meet the kit. Pins in red square corresponding pin instructions DC5-16V GPRS DC3.6-4.4V RS485_EN RELOAD RESET MIC_P MIC_N RCV_P RCV_N Pin8 HST_TXD Jinan USR IOT Technology Limited / 11 www.usriot.com... -
Page 6: Hardware Reference Design
There are 2 way for power: DC 5~18V and DC4V 2.1.1. DC5-18V When module adopts 5-18V power, pin 13 & pin 14 used to power the module. Connect 100uF/16V shunt capacitance to stable module work. Diagram as follows Jinan USR IOT Technology Limited / 11 www.usriot.com... -
Page 7: Dc 3.6~4.4V
If the I/O level of microcontroller is not 2.8V, level match is needed. DEVDD is the I/O power of MCU, V-PAD is the I/O power of module, user can do level match and pull-up power use. Switching circuit is shown below: Jinan USR IOT Technology Limited / 11 www.usriot.com... -
Page 8: Turn On/Off
On/Off interface is a function optional interface. If don’t need this, this pin MUST be vancant. When module is in On status, to set module in Off status, the switch should be closed. Reference diagram as follows: Jinan USR IOT Technology Limited / 11... -
Page 9: Work/Link Indicator
WORK, used to indicate module work status. Will output 1 when module start ok, output 0 when module shut down or no start. DATA, data transmission status. 1 means data transmission, 0 means no data transmission. GPRS, 1 means link connect, 0 means link disconnect. Jinan USR IOT Technology Limited / 11 www.usriot.com... -
Page 10: Audio Interface
33PF, 100PF matching network is used to filter audio clutter, so can get better tone quality When input/output audio signal by pickup/loud-speaker, if user want to process the audio signal by amplifying circuit, can refer to related audio design informations, suggest gain not too large. Jinan USR IOT Technology Limited / 11 www.usriot.com... - Page 11 USR-GPRS232-7S3 Hardware Manual h.usriot.com Jinan USR IOT Technology Limited / 11 www.usriot.com...
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