User's Manual

6
3VCC 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