Zhiatec ZFM-20 series, Руководство пользователя

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10/31/12 Google Translate
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3.1.1.2 serial protocol
Using a half-duplex asynchronous serial communication. The default baud rate is 57600bps, command set for 9600 ~ 115200bps.
D0 0 1 D7 D6 D5 D4 D3 D2 D1 1
Start bit Stop bits
10 frame format
Frame format for transmission 10, a level start bit, 8 data bits (LSB first), and one stop bit, no parity
Bit.
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Hangzhou refers Security Technology Co., Ltd.
3.1.1.3 Power-on delay time
Module after power-on, about 500mS time initialization work. During this period, the module does not respond to the command of the host computer.
3.1.1.4 electrical parameters
( All level power / signal ground GND reference level )
1.
Power input
Parameters
Item
Least Typical Maximum
Unit Equipment Note
Power supply voltage Vin
3.6 6.0 V
Normal operating value
Limit voltage Vin
max
- 0.3
7.0 V
Beyond this range may cause permanent damage to
Operating Current Icc
90 100 110 mA
Peak current Ipeak
150 mA
2. TXD (output, TTL logic level)
Ginseng Number
Project ArticleItem
Least Typical Maximum
Unit Remark
VOL IOL=-4mA 0.4 V
Logic 0
VOH IOH= 4mA 2.4 3.3 V
Logic 1
3. The RXD foot (input, TTL logic level)
Ginseng Number
Project ArticleItem
Least Typical Maximum
Unit Remark
VIL 0.6 V
Logic 0
VIH 2.4 V
Logic 1
VIH= 5V 1 mA
IIH
VIH= 3.3V 30 uA
VImax
- 0.3
5.5 V
Limit the input voltage
3.1.2 USB communication
USB communication module with the user device, the interface J1 pins are defined as follows:
Pin No. Name
Type Functional Description
1 Vin
in
Power is input. (Electrical parameters, see 3.1.1.4)
2 DP +
In / Out USB data cable.
3 DP-
In / Out USB data cable.
4 GND - Signal ground. The internal power supply connected.
5 END - Protectorate. Vacant or can be accessed by the communications lead shield. (Integrated module no such pin)
Note: the Type column in the input to the module out from the module output.