Opticon MDI-4000 Series, Руководство по последовательному интерфейсу, Страница: 33 / 139

MDI-4000 Series Serial Interface Manual
21
4.1.3 UART Basic Information
These are the basic UART Settings.
UART Settings
Setting Description Default
Transfer speed 300 to 115200 bps 9600 bps
Data length 7/8 bits 8 bit
Parity bit None/Even/Odd None
Stop bit 1/2 bits 1 bit
Handshake None, BUSY/READY, Modem, ACK/NAK None
Other option Flow control, Inter character delay
4.1.4 Baud Rate (Transfer Speed)
The baud rate is the rate at which bits are transmitted from the scan engine to the host and vice
versa. Both the reader and the host must be set to the same baud rate.
To activate and save the new configuration, you need to use the Z2 command (save settings in
non-volatile memory).
Note: You should configure these sett
ings at “Custom Factory Default.”
Baud Rate Commands
Command Description Default Condition
K1 300bps
K2 600bps
K3 1200bps
K4 2400bps
K5 4800bps
K6 9600bps
✓
K7 19200bps
K8 38400bps
K9 57600bps
SZ 115200bps
[D90 230400bps
[D91 460800bps See
“Sending Command Packets” on page 7
.
[D92 921600bps
4.1.5 Character Format
When data characters are transferred, a parity bit of 1 or 0 is added to each character so that
the total nu
mber of 1’s in the data bits is either even (even parity) or odd (odd parity).
Figure 12: Data Character Transfer Format
LSB MSB
TxD/RxD
Start Bit
(1)
Data Bits
(7/8)
Stop Bit
(1/2)
Parity Bit
(0/1)