HUAWEI MG323 GSM M2M Module |
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Hardware Guide | Description of the Application Interfaces |
Figure 3-9 The signal through the RING after the MG323 receives an SM
When an MG323 Module receives a voice call, a periodical low level signal for 1s and a high level signal for 4s are output by RING, as shown in Figure 3-10 .
Figure 3-10 The signal through the RING after the MG323 receives a voice call
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1s | 1s | 1s |
For detailed application of the MG323 UART1 interface, see HUAWEI Module UART Serial Port Design Guide.
The maximum level of UART1_DCD, UART1_RING, UART1_DSR and UART1_DTR signals is 3.2 V, and the maximum level of UART1_TD, UART1_RD, UART1_CTS and UART1_RTS signals is 3.25 V. Therefore, if the UART signals need to be connected the signal with 3.3 V, a level conversion curcuit is required.
UART1 interface must be powered on after the module is powered on to avoid the wind blow in which may cause the module cannot work properly.
The level of
3.7SIM Card Interface
3.7.1Overview
The MG323 module provides a SIM card interface complying with the ISO
Table
Pin No. | Signal Name | I/O | Description |
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1 | SIM_CLK | O | Clock signal of the SIM card |
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3 | VSIM | P | Power supply of the SIM card |
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5 | SIM_DATA | I/O | Data signal of the SIM card |
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7 | SIM_RST | O | Reset signal of the SIM card |
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Issue 06 | Huawei Proprietary and Confidential | 25 | |
Copyright © Huawei Technologies Co., Ltd. | |||
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