SIM5218E Hardware Design
3.10 I2C interface
SIM5218E contains an I2C interface. It is used for connecting peripheral equipment. Use AT
Command to read/write values of I2C peripheral equipment.
AT+CRIIC is used for read values
from register of I2C peripheral equipment. AT+CWIIC is used for write values to register of I2C
peripheral equipment.
Because I2C has been pulled up in SIM5218E, there is no need to be
pulled up by customer.
Table 18: PIN define of IIC interface
SIM5218E_ Hardware Design_V1.06
2012.09.21
39
*Note
：
IIC_SDA and IIC_SCL have been pulled up with two 2.2kR resistors to 2.6V in module.
So there is no need to pull them up in user’s application circuit.
3.11 High speed USB interface
SIM5218E contains a high speed universal serial bus (USB) interface. This interface is compliant
with the USB 2.0 specification. The speed is up to 480Mbps. So please pay attention to influence
of junction capacitance of ESD component on USB data lines. Typically, the capacitance value
should be less than 4pF @1MHz.
Links to these and related specifications can be found at www.usb.org
Table 19: USB PIN connect
Input voltage scope( V )
Name
PIN( B to B)
Min
Type
Max
USB_VBUS
9
4.4
5.0
5.25
USB_DP
60
USB_DM
59
They are compliant with the USB 2.0 specification.
GND
58
Pin
Name
Function
47
IIC_SDA
Serial interface data input and output
46
IIC_SCL
Serial interface clock input
Содержание SimCom SIM5218E
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