Ope-Pane Circuit; Usb I/F Control Circuit - Citizen CL-S6621 Technical Manual

Operation of Control Parts

(4) Ope-pane circuit

The ope-pane circuit consists of 4 LEDs and 4 switches.
U14 (FPGA) controls the transistors (Q2 to Q4) to turn ON/OFF the LEDs. Each switch signal
is input to U1A (CPU). (The following shows the simplified circuit diagram.)
U14
FPGA
LED_G
B3_31
L16
R140
LED_O
B1_9
E1
R141
LED_R
B3_30
L15
R142

(5) USB I/F control circuit

The USB I/F control circuit supports the interface with a high-speed USB2.0 device.
It consists of U28 (high-speed USB2.0 controller) and peripheral circuits.
X3 (clock generator) generates a 48MHz clock for U28. Pins 41 (VBUS), 39 (DM0) and 40
(DP0) are for USB interface. U28 is controlled by U1A (CPU).
X3
+3.3V
Clock Generator
4
V
1
SB
DSC8002DI1
Clock for USB2.0
(48MHz)
(48MHz)
To/From
U1A CPU
CL-S6621
Q2 DTC114EM +3.3V
PRTLED
Q3 DTC114EM
CNDLED
ERRLED
SW/FEED
SW/PAUSE
Q4 DTC114EM
SW/STOP
SW/MODE
To
U1A CPU
[SA, Main PCB]
U28
High Speed USB2.0 Controller
R129
3
23
XIN
C
2
G
62-69
72-79
D0-D15
D0-D15
47-49
52-55
A1-A7
A1-A7
56
nRD
RD_N
57
LLDQM/nLLBE
WR0_N
58
LUDQM/nLUBE
WR1_N
59
nUSBCS
CS_N
2
UB2INTP0
INT_N
3
UB2INTP1
SOF_N
4
UBREQ
DREQ0_N
5
UBACK
DACK0_N
44
nGRESET
RST_N
R8A66597FP
CN301
J4
D301
+3.3V
1 1
2 2
D302
3 3
D303
4 4
D304
5 5
4
4
6 6
SW301
7
7
SW302
8 8
SW303
9 9
SW304
10 10
11 11
12 12
[SA, Opepane PCB]
L6
41
VBUS
C137
L7
39
DM0
40
DP0
2-38
+3.3V
POWER ON (Green)
PRINT (Green)
CONDITION (Orange)
ERROR (Red)
FEED
PAUSE
STOP
MODE/REPEAT
High when USB
connector is connected.
C138
D6
USBVCC 1
2
DM
3
DP
4
USBLGND
5
SG
L8
D7
[SA, Main PCB]
J18
USB I/F