Sharp UX-B700 Service Manual page 64

UX-B700U
FO-B1600U
(6) IC12 ( PD65944) Hardware description
Serial data reception from FaxEngine
FaxEngine external bus connection
Resolution conversion/image zooming (70 % - 200 %)
Main scan: 203.3 dpi 600 dpi
Sub scan: 97.79 dpi/195.58 dpi/391.16 dpi
Main scanning direction: print position centering
Sub scanning direction: white skip
Printing dot calculation
Printing data: swath conversion
Split printing
IEEE1284 interface (commands/responses)
Autonomous output of printing commands
Buffer memory control (DRAM)/access arbitration
600 dpi
Fax Engine
Serial Data I/F
Received data
destruction
circuit
Serial data
receiving circuit
203 dpi data Memory access
buffer
arbiter
Blank data
interpolation
circuit
Main scanning
direction
resolution
conversion circuit
Main scan 600 dpi
data buffer
132kB(FIFO)
Conversion completed
Sub scanning
direction resolution
conversion circuit
Printing dot
calculation/duty
judging circuit
Sub scan 600
dpi data buffer
280kB
Swath data
Control
conversion circuit
Registers
ESC command
Command buffer
adding circuit
64B(FIFO)
IEEE1284 controller (compatibility mode, nibble)
IEEE1284 I/F
Printer controller
Hurricane
Fig. 5 Configuration of IF ASIC
5 – 9
IF ASIC
DRAM controller DRAM 4Mbit
Overall data
conversion controller
Number of dots
Interruptive
controller
Fax Engine
CPU Bus I/F
Fax Engine
bus interface
Response buffer
1024B(FIFO)