User's Manual

2.3. Pin Arrangement
Figure 2.2 EMW3280 pin arrangement
Pins
Pin Name
FT
Pins
Pin Name
FT
1-14
NC
22
UART_TXD(OUT)
15
GND
23
UART_RXD(IN)
√
16
nWI-FI LED(OUT)
BOOT(IN)
24
VDD
17
nRESET(IN)
25
GND
18
IO1
26-28
NC
19
NC
29
nWAKE_UP(IN）
20
nUART_RTS(OUT)
30
STATUS(IN)
√
21
nUART_CTS(IN)
√
2.4. Typical Hardware Connection And Pin Description
EMW3280 consume more power in data transmission. It is recommended that the VDD
power supply is connected in parallel with a 330uF/5V solid capacitor, or a high-frequency
electrolytic capacitor (low ESR), this can reduce the requirements of DC power supply, A 300mA
LDO can be used (500mA LDO is recommended).
Host Device
UART TX
UART RX
IO circult
WI-Fi Module
UART TX
IO circult
UART RX
TX
nCTS
UART_RXD
nUART_RTS
RX
nRTS
UART_TXD
nUART_CTS
IO2
IO1
IO3
STATUS
nRESET
WAKEUP
Optional
Optional
Optional
Optional
Optional
3.3V
Optional
nWIFI LED/BOOT
3.3V
VDD
GND
1K
IO4 FC(IO1)
Optional
Figure 2.3 Typical hardware connection: TTL/CMOS UART Interface
! ! EMW3280 Wi-Fi module
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