Data Transmission
Serial transmission data is composed of three of four different ele- ments, depending upon host system requirements. These elements are the START bit, DATA bits (7 or 8 bits), OPTIONAL PARITY bits, and STOP bit (s) (1 or 2 bits).
The PARITY bit is used for error detection (e.g., data altered in trans- mission), but is not required by all systems. A parity bit, if required, will be in one of the following four formats:
If your system requires a WORD length of 7 bits, one or two STOP bits, and a PARITY check, select the appropriate option from Table 1.
Table 1. 7 Bit Options
Data
Stop
Bits
Parity
Option
7
1
Odd
ED
7
1
Even
EC
7
1
Mark
EB
7
1
Space
EA*
7
2
Odd
EH
7
2
Even
EG
14 | User’s / Programming Guide |
