![SIM Tech SIM5360A Скачать руководство пользователя страница 44](http://html1.mh-extra.com/html/sim-tech/sim5360a/sim5360a_hardware-design_1274309044.webp)
Smart Machine Smart Decision
SIM5360_Hardware Design_V1.06
2016-11-17
44
Table 27: Control status
GPIO4 Status
Module operation
Low Level
Flight Mode: RF is closed.
High Level
Normal Mode: RF is working.
Note
:
1. For SIM5360, GPIO0, GPIO2, GPIO3 and GPIO5 have multiplex function, user can use them
as PCM interface to connect extend codec. Refer to section 3.11 and document [1] for details.
2. When the module is powered off, make sure all digital interfaces (PCM UART, etc) connected with
peripheral devices have no voltage higher than 0.3V. If users’ design cannot meet above conditions,
high level voltages maybe occur in GPIO pins because current leakage from above digital interfaces
may occur.
3.13
PCM Interface
SIM5360 provides hardware PCM interface for external codec. The PCM interface enables
communication with an external codec to support hands-free applications. SIM5360 PCM interface can be
used in two modes: the default mode is auxiliary PCM (8 KHz long sync mode at 128 KHz PCM CLK);
the other mode is primary PCM (8 KHz short sync mode at 2048 KHz PCM CLK). In short-sync
(primary PCM) mode, SIM5360 can be a master or a slave. In long-sync (auxiliary PCM) mode, SIM5360
is always a master. SIM5360 also supports 3 kinds of coding formats: 8 bits (μ-law or A-law) and 16 bits
(linear).
Note: PCM interface is multiplexed from GPIO (default setting). The AT command “AT+CPCM” is
used to switch between PCM and GPIO functions. Please refer to document [21] and document [1] for
details.
3.13.1
Pin Description
Table 28: Pin description
Pins
Pin No.
Description
PCM_OUT
73
PCM data output
PCM_IN
74
PCM data input
PCM_SYNC
75
PCM data synchrony
PCM_CLK
76
PCM data clock
Table 29: Electronic characteristic
SIMCOM
CONFIDENTIAL
FILE