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EPSON Stylus Pro 7000 Revision B
Operating Principles Summary of Control Circuit Operations 77
Table 2-6. Control Circuit Operation
Name/Code Location Function
CPU (C90A14CA)
SH7043
IC8
32 bit RISC-CPU
• Clock speed = 33MHz
• 128KB PROM (IPL) internal
ASIC (E06A4610A) IC9 I/O port expansion
ASIC (E05B61AA) IC13
1) Regulates print data
• Command handling
• Rasterizer (image data handling)
• Head drive regulation (DAC control)
• Print timing regulation
2) Memory (DRAM/SRAM)
3) I/F Circuit Control
• Parallel interface (IEEE1284)
• USB interface
• Type-B
ASIC (TE7751) IC20
Motor regulation
• Pump Motor (pump/PG)
• Cutter solenoid
• Fan (Paper suction) x2
ASIC (uPD65802) IC32
Motor regulation (PWM regulation)
• CR Motor
•PF Motor
DAC (M65530FP) IC37
3 channel 10 bit DA converter
• head-drive voltage control
Flash Memory
(MBM29F400TC)
IC1, IC2
Flash Memory (1Mbyte)
• Save firmware
• Register D/A, user defined, and
factory default setting parameters
DRAM (EDO)
IC81, IC82
IC73~76
EDO RAM
• 10Mbyte (onboard)
SRAM
(LC3564SM-10)
IC39
64Kbit SRAM
• External data ring buffer type
EEPROM IC61
Serial EEPROM
Head drive D/A factory adjustment
parameters
USB-ID factory settings
M51953BFP IC80 Reset IC
Driver IC (L6203) IC33, IC35 CR/PF Motor Drivers
Driver IC (LB1845) IC30 Pump Motor Driver
Driver IC
(MMDF205ZR2)
IC41, IC43
Suction fan x2 and cutter solenoid
driver
PQ3RD13 IC15 +3.3V regulator
Table 2-6. Control Circuit Operation (continued)
Name/Code Location Function