Bematech MP-4000 TH - Blocks Diagram; Communication Cable; Female Type B Connector (Printer); USB Interface Board

16
USB Interface Board
The IC U1, CP2102, is the IC responsible for the conversion of CMOS RS-232 signals originated
from the control board microcontroller for compatible signals with the USB interface, as well as
the conversion of USB signals originated from the outside into CMOS RS-232 signals.
The recognition of the interface connected to the control board is done with the reading of a
code associated to each kind of board through U2, enabled by the SELDEV signal generated by
the control board.
Blocks Diagram
PC2102
USB
CONNECTOR
(TYPE B)
MICROTERMINAL /
HOST
FCI
CONNECTOR
(40 PINS)
CONTROL BOARD
INTERFACE
IDENTIFIER
Female Type B Connector (Printer)
Pin Signal
1 VBUS
2 D -
3 D+
4 GND
Communication Cable
Male
Type A
Male
Type B
12
34
4 3 2 1
1
2
3
4
1
2
3
4
Male
Type A
M
a
l
e
Type
B