EPSON Stylus COLOR 680/777/77i Revision B
Operating Principles Electrical Circuit Operating Principles 44
2.2.2.1 Main elements
Table 2-7 shows the function of the each main elements on C383 MAIN.
Table 2-7. Main Elements
IC Location Function
CPU
E01A15CA
IC9
16bit CPU mounted on the MAIN board is driven by
clock frequency 24MHz and controls the printer.
PROM IC1
• Capacity 8/16/32/64MB, Bus= 16 bit
•ProgramforCPU
RAM IC5, IC8 Bus= 16 bit, 4Mbit DRAM and 16Mbit DRAM
EEPROM IC15
1kbit EEPROM
• Default value setting
• Parameter backup
Reset IC IC16
Reset IC
• For +5V; reset when +4.2V is detected
• For +42V, reset when +33.2 is detected
Common Driver IC10
Head drive control HIC
• Generates head common voltage.
Motor Driver IC12 CR motor drive IC
Motor Driver IC13 PF motor drive IC
Parallel I/F IC IC6 IEEE1284 parallel I/F transceiver IC.
USB IC IC2, IC3 USB transceiver IC
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