SATO TG308, Service Manual

Page: 26 / 252

Section 3: Interface Specifications
Page 3-6
TG3 Series Service Manual
3.3 IEEE 1284 PARALLEL INTERFACE
The IEEE 1284 Interface on the printer complies with Centronics/ IEEE1284 standards.It will automatically
detect the IEEE1284 signals and operate in the high speed mode. If it does not detect the IEEE1284 signals,
it will operate in the standard Centronics mode, which is significantly slower. For this reason, an interface
cable and host interface conforming to the IEEE1284 specification must be present to fully utilize the speed
capabilities. Single-item buffer and multi buffer are available for the receive mode, and switchblade in the
Interface Mode of the printer.
The ECP mode is recommended for LPT1 port settings.
Make sure to change the LPT1 port settings through the BIOS settings.
3.3.1 Basic Specifications
Note:
Send print data while the printer is on.
Interface connector
Printer side: Amphenol (DDK) 57 to 40360 or equivalent
Cable side: Amphenol (DDK) 57 to 30360 or equivalent
Cable length 4.92 feet (1.5 m) or shorter
Signal level High level
Low level : +2.4 to +5.0V
: +0.0 to +0.4V
Receive mode Single-item buffer
Multi buffer
Go to the Interface Mode of the printer for the setup of receive mode.
Maximum receive
buffer capacity 2.95 MB
Timing chart
Parallel Connector Pin Asignments
1 18
19 36
Buffer near full
Buffer near full
0MB
2.95MB
Remaining 0.95MB
Remaining 1.95MB
occurred
released
DATA
BUSY
STROBE
ACK
T1 T2
(1) 1.0 μ s < T1, T2
0.6 μ s < T3 < 1.2 μ s
(2) For single-item buffer, ACK length(0.5 ～ 12.0 μ s) is settable in the Interface Mode.
T1 T2 T3
For ECP Mode For Centronics Compatible Mode