Option Board I/F Circuit (Option) - Citizen CL-E700 series Technical Manual

Chapter 2 Operating Principles
2-2.
Operation of Control Parts

(7) Option board I/F circuit (option)

The I/F circuit of the option board supports the following interfaces.
• RS232C (Serial I/F)
• IEEE1284 (Parallel I/F)
• Ethernet I/F (Multi-function type)
• Wi-Fi I/F
Each signal of the option board is directly connected to the CPU (U1A) and the FPGA (U5). It
is controlled by the CPU and the FPGA.
IFTXD/SO/DIR
IFRXD/SI
IFSCLK
nRSTIF
To/From
USBDP1
U1A CPU
USBDM1
(Transient Voltage Supressor)
USBVBUS1
CL-E700 series
nSLCTIN/CTS
nATFD/DSR
nSTROBE
CEDAT0-CEDAT7
nINIT/nPRIME
To/From
BUSY/RTS
U5 FPGA
nACK/DTR
nFAULT
SLCT
PE
DSWOUT
L3
Diode Array
D5
L2
R91
D4
C127
C128
2-44
+24V
+5.0V J7
To Interface Board (Option)
28-32
+24V
20
+5V
1
SELECTIN/CST/pINT
2
AUTOFDXT/DSR
3
STB/OCI0
4-11
DATA0-7/DIPSW0-7/hEP00,hEP01
12
nPRIME
4
13
BUSY/RTS/pEP00
14
ACK/DTR/pEP01
15
FAULT/hINT
16
SELECT/PPON0
17
PE
18
DWSWOT
24
TXD/SO/DIR
25
RXD/SI
26
SCLK
27
RESET
21
USB_D+
22
USB_D-
23
VBUS
33-38,40
GND
L4
[SA Main PCB]