Epson Stylus PRO 7000 Service Manual page 77

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