Unit 3: Interface Specifications
SATO MB200 Operator Manual
PN 9001126A
Page 3-3
TTL INTERFACE
The only difference between this interface and the RS232C is their signal levels and cable
pinouts.
TTL SPECIFICATIONS
Asynchronous ASCII
Half-duplex communication
Data Transmission Rate
4800, 9600, 19200, 38400 bps
Data Length
8 bit (selectable)
Stop Bit
1 bit (fixed)
Parity Bit
ODD, EVEN, NONE (selectable)
Codes Used
ASC2 Character Codes, JIS Kanji Codes
Control Codes
STX (02H), ETX (03H), ACK (06H), NAK (15H)
Connector
Special
Cable
Special
Signal Levels
High = +2.0V to +3.3V Low = -0.5V to -0.8V
INTERFACE SIGNALS
PIN
DIRECTION
SIGNAL DEFINITION
1
Reference
SG (Signal Ground)
2
---
Reserved
3
---
Reserved
4
---
Reserved
5
---
Reserved
6
Reference
SG (Signal Ground)
7
---
Reserved
8
To Host
SD (Sending Data) - Data to the host computer from the printer.
9
To Printer
RD (Receive Data) - Data to the printer from the host computer.
10
---
Reserved
11
---
Reserved
12
Reference
SG (Signal Ground)
WARNING: NEVER CONNECT OR DISCONNECT INTERFACE CABLES
(OR USE A SWITCH BOX) WITH POWER APPLIED TO EITHER THE
HOST OR THE PRINTER. THIS MAY CAUSE DAMAGE TO THE
INTERFACE CIRCUITRY IN THE PRINTER/HOST AND IS NOT COVERED
BY WARRANTY.