https://www.lairdconnect.com/vela-if820-series
22
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shows how Vela IF820 PUART for integrated antenna variant maps to on board pin header, and also TTL-232R cable
pin suggested.
Table 8: UART mapping, integrated antenna board
Pin Number
Vela IF820 PUART
TTL-232R cable
TTL-232R cable color
J2.1
GND
GND
Black
J1.22
P_UART
_
RTS
HOST
_
CTS
Brown
No connect to IF820
power
Red
J1.20
P_UART_RXD
HOST_TXD
Orange
J1.24
P_UART_TXD
HOST_RXD
Yellow
J1.18
P_UART_CTS
HOST_RTS
Green
Figure 19: Photo of USB to TTL-232 (3.3V) cable connected to MHF4 variant Vela IF820 PUART directly
shows how Vela IF820 PUART for MHF4 variant maps to on board pin header, and also TTL-232R cable pin
suggested.
Table 9: UART mapping, MHF4 board
Pin Number
Vela IF820
TTL-232R cable
TTL-232R cable color
J2.1
GND
GND
Black
J3.7
P_UART
_
RTS
HOST
_
CTS
Brown
No connect to IF820
power
Red
J2.19
P_UART_RXD
HOST_TXD
Orange
J2.17
P_UART_TXD
HOST_RXD
Yellow
J3.5
P_UART_CTS
HOST_RTS
Green
Содержание Vela IF820
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