Lukhan LK-T21 - USB Interface and Data Receiving Timing

LK-T21 Technical Manual
2.1.7 Data Receiving Timing (Compatibility Mode)
Specifications
Characteristics Symbol
Min [ns] Max [ns]
Data Hold Time (host) tHold 750 --
Data Setup Time tSetup 750 --
STROBE Pulse Width tSTB 750 --
READY Cycle Idle Time tReady 0 --
BUSY Output Delay Time tBUSY 0 500
Data Processing Time tReply 0
∝
ACKNLG Pulse Width tACK 500 10us
BUSY Release Time tnBUSY 0
∝
ACK Cycle Idle Time tNEXT 0 --
•The printer latches data at a nStrobe ↓timing
2.1.8 USB Interface
PIN SIGNAL I/O DESCRIPTION
1 +5V - +5V
2 DATA- - Printer transmit data line
3 DATA+ - Printer transmit data line
4 GND - System Ground
1) Specifications
Data transmission: USB 2.0
Connector: USB “B” type connector
2) USB interface connection example
Host side Printer side
VCC ………………………………… VCC
DATA+ ……………………………… DATA+
DATA- ……………………………… DATA-
GND ………………………………… GND
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