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All camera pins can be configured for GPIOs by the AT command “
AT+CCGSWT”
. These GPIOs also
support interruption operation if used as input pins. If these pins are configured for GPIOs, the sequence is
listed in the following table.
Table 20: GPIO configuration
Pin name
GPIO No.
CAM_D2
GPIO6
CAM_D3
GPIO7
CAM_D4
GPIO8
CAM_D5
GPIO9
CAM_D6
GPIO10
CAM_D7
GPIO11
CAM_D8
GPIO12
CAM_D9
GPIO13
CAM_HSYNC
GPIO14
CAM_VSYNC
GPIO15
CAM_CLK
GPIO16
CAM_PCLK
GPIO17
CAM_RESET
GPIO18
CAM_STANDBY
GPIO19
Note:
1.We have tested several kinds of digital sensors, such as OV2640, OV7670
,
OV7725 and a NTSC/PAL digital video
decoder named AK8856.
Software must be adjusted before users adopt other kinds of sensors.
2. Because of high bit rate on camera bus, pay attention to influence of junction capacitance of ESD component on clock
and data lines. Typically, the capacitance should be less than 10pF.
3. Pay attention to the polarity of power down pin in users’ sensor before designing. Default polarity of
SIM5215A&SIM5216A is shown: LOW: normal operation HIGH: power-down.
3.8
USB Interface
SIM5215&SIM5216 module contains a USB interface. This interface is compliant with the USB2.0
specification. The USB2.0 specification requires hosts such as the computer to support all three USB
speeds, namely low-speed (1.5Mbps), full-speed (12Mbps) and high-speed (480Mbps). USB charging and
USB-OTG is not supported.
Table 21: Electronic characteristic
Input voltage scope( V )
Pin name
Pin No.
Min
Typ
Max
SIM5215&SIM5216_Hardware Design_V2.02
2012-08-31
41
Содержание SIM5215
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