Chapter 2 Operating Principles
2-2.
Operation of Control Parts
CL-E720DT
2-28
(3)
Clock circuit
Crystal oscillator X1 oscillates a 48 MHz clock. This clock is send to the CPU (U1A) and the
CPU generates a 384 MHz internal clock and 64 MHz bus clock.
The 64MHz bus clock is fed to the FPGA (U5) and SDRAM (U4).
FPGA
X1
R14
C8
System Clock
(48MHz)
BUSCLK
CKIO
45
CLK1
E1
Bus Clock
(64MHz)
Internal Clock
(384MHz)
C9
BUSCLK
[SA Main PCB]
L12
R13
CPU
U1A
U5
(To SDRAM)
R12
48MHz
USB_X1
163
USB_X2
164
Summary of Contents for CL-E720DT
Page 1: ...Technical Manual CL E720DT Direct Thermal Barcode Label Printer ...
Page 5: ...Chapter 1 Specifications 1 1 CL E720DT CHAPTER 1 SPECIFICATIONS ...
Page 15: ...Chapter 2 Operating Principles 2 1 CL E720DT CHAPTER 2 OPERATING PRINCIPLES ...
Page 75: ...Chapter 3 Disassembly and Maintenance 3 1 CL E720DT CHAPTER 3 DISASSEMBLY AND MAINTENANCE ...
Page 119: ...Chapter 4 Troubleshooting 4 1 CL E720DT CHAPTER 4 TROUBLESHOOTING ...
Page 131: ...Chapter 5 Parts Lists 5 1 CL E720DT CHAPTER 5 PARTS LISTS ...
Page 159: ...Chapter 5 Parts Lists 5 29 CL E720DT DRAWING NO 7 Unit Opepane Rev 0 ...
Page 162: ...Chapter 5 Parts Lists CL E720DT 5 32 DRAWING NO 8 Accessories Rev 0 3 2 1 1 1 2 1 3 ...
Page 164: ...Chapter 6 Circuit Diagrams 6 1 CL E720DT CHAPTER 6 CIRCUIT DIAGRAMS ...
Page 183: ...Appendices AP 1 CL E720DT APPENDICES ...
Page 186: ...Appendices A Mounting Diagrams CL E720DT AP 4 2 Solder side ...