SimCom SIM5320AL

Smart Machine Smart Decision
SIM5320AL_User Manual_V1.01 2014-08-20
30
Figure 18: Null modem
3.3.1 Pin Description
Table 7: Pin description
Pin type Pin name Pin No. I/O Active voltage Default Status
UART
UART_RXD 68 I H Pull-Down
UART_TXD 71 O H Pull-Up
UART_RTS 66 O H
UART_CTS 67 I H Pull-Up
UART_DTR 72 I H Pull-Up
UART_DCD 70 O H
UART_RI 69 O H
More pin information refers to chapter 2.2.
Table 8: Logic level
Parameter Min Max Unit
Logic low input 0 0.3*VDD_EXT V
Logic high input 0.7 *VDD_EXT VDD_EXT +0.3 V
Logic low output GND 0.2 V
Logic high output VDD_EXT -0.2 VDD_EXT V
Note: VDD_EXT (=2.6V) is e reference voltage in module internal interface.
All pins of all serial ports have 8mA driver capacity.