2-22
Mechanism Configuration and Operating Principles
Rev. A
C o n fid e n tia l
ROM (512K bit) or FLASH MEMORY (4M bits or 8M bits)
The printer control program and the character generator data are written in ROM (U8) or Flash
memory (U101). The control program controls the basic operations of the printer. All CPU (U5)
operations follow this program.
RAM (CPU internal 2KB)
RAM is used as temporary storage for the following:
❏
Data received from the interface (receive buffer)
❏
Pattern data to be printed by the print head (printer buffer)
❏
Data used by the CPU (U5) during processing (flags, pointers, etc.).
67
P43
HEAD5
O
TTL
Print head #5 driver signal. LOW: on.
68
P44
HEAD4
O
TTL
Print head #4 driver signal. LOW: on.
69
P45
HEAD3
O
TTL
Print head #3 driver signal. LOW: on.
70
P46
HEAD2
O
TTL
Print head #2 driver signal. LOW: on.
71
P47
HEAD1
O
TTL
Print head #1 driver signal. LOW: on.
72
P48
HEAD9
O
TTL
Print head #9 driver signal. LOW: on.
73
P51/T04
+24VCOM SW
O
TTL
Head, auto cutter, drawer kick-out power
switch. LOW: drive.
74
P52
CRCOM SW
O
TTL
Carriage motor power switch. LOW: motor
drive.
75
VCC
VCC
I
(+5 V)
Main power terminal (+5 V).
76
P53
PFCOM SW
O
TTL
Paper feed motor power switch LOW: motor
drive.
77
P54
CLK REQ
O
TTL
HOST interface CLK REQ.
78
VSS
VSS
I
(0 V)
GND terminal.
79
P55
CTS
I
TTL
Host interface CTS. LOW: on.
80
P56
PLED/DSW0
I/O
TTL
PAPER OUT LED. Low: on.
DIP SW 2-2 read when P100 is LOW.
CPU pin functions
Pin
No.
CPU
Function
Signal Name
I/O
Level
Description
Summary of Contents for TM-U200 Series
Page 6: ...iv Confidential Revision Sheet Revision Page Altered Items and Contents Rev A ...
Page 72: ...2 30 Mechanism Configuration and Operating Principles Rev A Confidential ...
Page 172: ...6 Appendix Rev A Confidential Main Circuit Board Parts Layout ...
Page 176: ...10 Appendix Rev A Confidential ...
Page 186: ...Rev A Appendix A 20 TM U200 Series Type A AM Technical Manual Confidential ...
Page 187: ...Confidential SEIKO EPSON CORPORATION Printed in Japan ...
