Epson TM-L500A Technical Reference Guide: RFID - Page 68

USB (Universal Serial Bus) Interface, Outline, USB transmission specifications

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USB (Universal Serial Bus) Interface Outline • Full-speed transmission at 12 Mbps [bps: bits per second] • Plug & Play, Hot Insertion & Removal USB transmission specifications USB function Overall specifications USB 2.0 Transmission speed USB Full-Speed (12 Mbps) Transmission method USB bulk transmission method Power supply specifications USB self power supply function Current consumed by USB bus 0 mA USB packet size (with full-speed connection) USB bulk OUT (TM) 64 bytes USB bulk IN (TM) 64 bytes USB device class Both vendor-defined class and USB printer class are supported. Switching of the class can be set by DIP switch on startup. USB descriptor USB vendor-defined class USB printer class Vendor ID 04b8h 04b8h Product ID 0202h 0E08h String Descriptor Manufacturer Product Serial number EPSON TM-L500A Character string based on the product serial number Status transmission from printer with USB interface In order to ensure that there is no lack of status data, it is necessary to periodically retrieve status data at the host computer. Unlike RS-232 transmission, status cannot spontaneously interrupt data transmission to the host computer. The printer has a 128-byte status data buffer. Statuses that exceed the buffer capacity are canceled. 68

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68
USB (Universal Serial Bus) Interface
Outline
•F
u
ll-speed
t
ra
n
sm
i
ss
i
o
n
a
t
12 Mbps [bps: b
it
s per seco
n
d]
• Pl
ug
& Play, Ho
t
I
n
ser
ti
o
n
& Removal
USB transmission specifications
USB function
Status transmission from printer with USB interface
I
n
order
t
o e
n
s
u
re
t
ha
t
t
here
i
s
n
o lack of s
t
a
tu
s da
t
a,
it
i
s
n
ecessary
t
o per
i
od
i
cally re
t
r
i
eve s
t
a
tu
s
da
t
a a
t
t
he hos
t
comp
ut
er.
U
n
l
i
ke RS-232
t
ra
n
sm
i
ss
i
o
n
, s
t
a
tu
s ca
nn
o
t
spo
nt
a
n
eo
u
sly
int
err
u
p
t
da
t
a
t
ra
n
sm
i
ss
i
o
n
t
o
t
he hos
t
comp
ut
er.
The pr
int
er has a 128-by
t
e s
t
a
tu
s da
t
a b
u
ffer. S
t
a
tu
ses
t
ha
t
exceed
t
he b
u
ffer capac
it
y are
ca
n
celed.
Overall specifications
USB 2.0
Transmission speed
USB Full-Speed (12 Mbps)
Transmission method
USB bulk transmission method
Power supply specifications
USB self power supply function
Current consumed by USB bus
0 mA
USB packet size (with full-speed connection)
USB bulk OUT (TM)
64 bytes
USB bulk IN (TM)
64 bytes
USB device class
Both vendor-defined class and USB printer class are
supported. Switching of the class can be set by DIP
switch on startup.
USB descriptor
USB vendor-defined class
USB printer class
Vendor ID
04b8h
04b8h
Product ID
0202h
0E08h
String Descriptor
Manufacturer
Product
Serial number
EPSON
TM-L500A
Character string based on the product serial number