Epson TM-L500A Technical Reference Guide: RFID - Page 64

Functions of each connector pin, Receive buffer full

Get Epson TM-L500A PDF manuals and user guides View all Epson TM-L500A manuals
Add to My Manuals
Save this manual to your list of manuals

Page 64 highlights

Functions of each connector pin Receive buffer full:  When the remaining space in the receive buffer drops to 128 bytes, the printer status becomes "buffer full" and it remains "buffer full" until the space in the receive buffer increases to 256 bytes.  The printer ignores the data received when the remaining space in the receive buffer is 0 byte. DSUB9 Pin no. 1 2 3 4 5 6 DSUB25 Pin no. - 3 2 20 7 6 Signal name NC RXD TXD DTR GND DSR Signal direction - Input Output Output - Input Function Not connected Receive data Transmit data Indicates whether or not the printer power is ON. SPACE indicates that the printer power is ON, and MARK indicates that the printer power is OFF. Indicates whether or not the printer is BUSY. SPACE indicates that the printer is ready to receive data, and MARK indicates that the printer is BUSY. The printer goes BUSY when the printer is made offline by pressing down the On/Off Line button or when the receive buffer is full. Signal ground Indicates whether or not the host computer power is ON. SPACE indicates that the host computer is ON, and MARK indicates that the host computer is OFF. Changing the setting of DIP switch or memory switch allows this signal to be used as a reset signal for the printer. This reset signal is used for detecting the MARK status of the host computer and for resetting the printer. Indicates whether or not the host computer is ready to receive data. SPACE indicates that the host computer is ready to receive data, and MARK indicates that the host computer is not to ready to receive data. When DTR/DSR control is selected, check the status of this signal before transmitting data. 64

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
64
Functions of each connector pin
Receive buffer full:
When the remaining space in the receive buffer drops to 128 bytes, the printer status
becomes "buffer full" and it remains "buffer full" until the space in the receive buffer
increases to 256 bytes.
The printer ignores the data received when the remaining space in the receive buffer is 0
byte.
DSUB9
Pin no.
DSUB25
Pin no.
Signal
name
Signal
direction
Function
1
—
NC
—
Not connected
2
3
RXD
Input
Receive data
3
2
TXD
Output
Transmit data
4
20
DTR
Output
<When RTS/CTS flow control is selected>
Indicates whether or not the printer power is ON.
SPACE indicates that the printer power is ON, and MARK
indicates that the printer power is OFF.
<When DTR/DSR flow control is selected>
Indicates whether or not the printer is BUSY.
SPACE indicates that the printer is ready to receive data,
and MARK indicates that the printer is BUSY.
The printer goes BUSY when the printer is made offline by
pressing down the On/Off Line button or when the receive
buffer is full.
5
7
GND
—
Signal ground
6
6
DSR
Input
<When RTS/CTS flow control is selected>
Indicates whether or not the host computer power is ON.
SPACE indicates that the host computer is ON, and MARK
indicates that the host computer is OFF.
Changing the setting of DIP switch or memory switch allows
this signal to be used as a reset signal for the printer. This
reset signal is used for detecting the MARK status of the
host computer and for resetting the printer.
<When DTR/DSR flow control is selected>
Indicates whether or not the host computer is ready to
receive data.
SPACE indicates that the host computer is ready to receive
data, and MARK indicates that the host computer is not to
ready to receive data.
When DTR/DSR control is selected, check the status of this
signal before transmitting data.