Shenzhen Ogemray Technology Co. Ltd WF7681KMX 用户手册
6
3
VCC
3.3V
4
RXD
UART_RXD(UART Receive data)
5
TXD
UART_TXD(UART transmit data)
6
GPIO3
GPIO3
7
GPIO2
GPIO2
8
GPIO1
GPIO1
9
GPIO0
GPIO0
10
NC
Not Connection
Notes:
1.
GPIO0
〜3 can be pulled up to low or high
2.
For the time being only UART/GPIO supported
3.
Pin 10 must ben’t connected
4
、GPIO1 has been reserved for a AT command mode switching, high level is the AT
command mode, low level is pure data model
1.7 Characteristics
Table 1- 3 Absolute Max Rating
Symbol
Description
Max rating
Unit
VCC
3.3V power input
-0.3~3.6
V
VESD
ESD protection (HBM)
2000
V
Table 1- 4 DC Characteristic
Symbol
Description
Condition
Min
Typ
Max
Unit
3.3VD
Power supply
3.3V
2.97
3.3
3.63
V
V
IL
Input low voltage
LVTTL
-0.28
N/A
0.6
V
V
IH
Input low voltage
2.0
3.3
3.63
V
V
T-
Negative trigger
0.68
N/A
1.36
V
V
T+
Positive trigger
1.36
N/A
1.7
V
V
OL
Output low voltage
II
OL
I=1.6~14mA
-0.28
N/A
0.4
V
V
OH
Output high voltage
II
OH
I=1.6~14mA
2.4
N/A
3.63
V
R
PU
Input pull-up
resistance
PU=high
，PD=low
40
N/A
190
KΩ
R
PD
Input pull-down
resistance
PU=low
，PD=high
40
N/A
190
KΩ