Sam4s ER-5100? SERIES - 2-5-1-4 H;W Flow Control Timing

2. Product Specifications
2-8 SAM4S ER-5100II SERIES
2-5 Interface Specification
2-5-1-3 Signal Description
Pin No. Signal Name Signal Direction Function
BODY Frame GND - Frame Ground
2 RXD Input Receive Data
3 TXD Output Transmit Data
4 DTR Output
This Signal indicates whether the ECR(ER-5100II) is busy. (H/W flow control)
① MARK(Logic1) : The ECR is busy
② SPACE(Logic0) : The ECR is not busy
③ The host transmits a data to the ECR, after confirming this signal.
5 Signal GND - Signal Ground
6 DSR Input
This signal indicates whether the host computer or receipt printer can receive data.
(H/W flow control)
① MARK(Logic1) : The host can receive a data.
② SPACE(Logic0) : The host can not receive a data
③ The ECR transmits a data to the host or receipt printer, after confirming this signal.
9 VCC Output VCC(+5V/200mA) is supplied at 9Pin of D-SUB Connector.
Table2-12 RS-232C Signal Description
Caution: The VCC is supplied for the barcode or device power source. If the Total Power Consumption of the
attached devices is exceeded the specification(200mA), the system stops the VCC of D-SUB Connector
2-5-1-4 H/W Flow Control Timing
When DTR/DSR flow control is select, before transmitting a data, the ECR checks whether the host is BUSY or not.
If the host is BUSY, ECR does not transmit a data to the host. If the host is not BUSY, ECR transmits a data to the
Host. The host is the same. Refer to the Interface Part of Chapter 7(Special Circuit Diagrams).