Usb Interface - Brother HL-2030 Service Manual

The functions of the interface block communication with external devices are described below;
1.3.2

USB interface

Stores the data received from the PC into DRAM as controlled by the DMA controller. The
transmission speed is 12Mbps.
< HL-2030/2040 >
USBDP
USBDN
< HL-2070N >
U6
USBCTL
USBDP
UDBDN
MB87S1200
USBCTL
4C
USBVCC
TP71
3C
TP30
R27
27
TP24
4C
R26
27
4C
C52
C101
TP49
172
TP31
R25
170
27
TP21
169 R23
27
C36
C38
C68P
C68P
0V
TP47
C35
C101
R49
1.5k
R65
0V
1M
R50 R68
100k
22k
UDZS6.8B
IF_FG
0V
0V 0V
Fig. 3-5
TP42
R32
USBVCC
2F
C42
C101
C43
R34
C101
1.5k
0V
0V
R33
100k
DA1
0V
Fig. 3-6
3-5
HL-2030/2040/2070N SERVICE MANUAL
USB
CN5
1
PC5V
3
DP
2
DN
4
GND
0V
5
FG
6
FG
UBR24-4K2300
1M
USB
R37
22k
CN5
1
PC5V
3
DP
2
DN
4
GND
0V
5
FG
6
FG
IF_FG
DF5A6.8FU
UBR24-4K2300
0V
Confidential