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OPERATING PRlNClpLES
Table 2-5 describes the functions of the main components on the C204 MAIN and C204 DRV board.
Board
C204 MAIN
:204 DRV
I
/
f
f
E
I
f
:
:
L
IC Name
TMP95C061
(CPU)
E05B36
(Gate Array)
‘ROM
3AM
.EPROM
iDM232
‘ST591 D
jTK681-050
jTK67136MK4
IPC393C
I
I
I
II
II
II
I(
II
I(
It
I(
Tablc
xnxtion
lC2
Cl
C5
214
311
39
313
Zl
:2
:3
?i
I
!-5. Main IC Functions
Functions
Receives data from the host computer via the gate array, loads
the data to the input buffer in the RAM, and converts the image
data to print data.
The main features are:
.
.
.
.
.
.
.
.
.
.
.
.
.
/CS (Chip Select) signal creation
Address decoding
Address latching
Clock pulse creation
Printhead driver control
CR motor driver control
CR and PG motor pulse encoder I/O (input/output)
Encoder pulse I/O
Phase signal creation for the motors
I/O port control
Interface control
Abnormal CR and PF motor detection
/RESET signal creation
Contains the program that runs the CPU.
Holds the CPU working area and buffers (input,, line,, and
image buffers).
Memorizes the printer unique parameter during the power is off.
EIA to Logic level voltage level converter
System reset IC
Drives the CR motor.
Drives the PF motor.
Detects the current in the CR motor driver and feeds it back to
the gate array on the C204 MAIN board.