Jäger ADwin-Pro, System And Hardware Description

Page: 192 / 218

Pro I: Signal Conditioning and Interface Modules
Pro-RSxxx Rev. A
ADwin
188
ADwin-Pro Hardware, manual version 2.9, June 2006
fig. 324 shows the pin assignment of the D-SUB sockets.
Fig. 324 – Pro-RS-xxx: Pin assignments
Interface parameters
Each interface has an input and an output FIFO with a length of 64 bytes each.
The settings of the interface parameters are made separately for each chan-
nel, using the controller register. Below the settings are described more
detailed:
Handshake – Handshake: The interface can be operated in 3 modes:
1. Without handshake
2. Software handshake
3. Hardware handshake (RS232 only!)
When using the hardware handshake the signals RTS and CTS must be
connected.
Parity – Parity: In order to recognize an error or incorrect data during the transfer,
a parity bit can be transferred at the same time. The parity can be even
or odd or you can have no parity bit at all.
Data bits – Data bits: the active data to be transferred may be 5...8 bits long.
Stop bits – Stop bits: The number of stop bits can be set to 1, 1½ or 2. Here the num-
ber of stop bits depends on the number of data bits:
• 5 data bits: 1 or 1½ stop bits.
• 6…8 data bits: 1 or 2 stop bits.
Baud rate – Baud rate: The physical data are between 35 Baud and 2.304 MBaud;
when using an RS-232 interface the maximum Baud rate is 115.2
kBaud, according to the specification.
The Baud rates are derived by the clock rate of the module; the basic
clock rate has a frequency of 2.304MHz. Based on this fact, every Baud
rate is possible, which can be derived by an integer division of the basic
frequency. The divisor can have values between
1
…
0FFFFh
. The fol-
lowing table shows some common Baud rates and their divisors.
Fig. 325 – Pro-RS-xxx: Baud rates
RS-232 (socket) RS-485 (socket)
6
7
8
9
1
2
3
4
5
D ata C arrier D etect
Rx eceive D ata
Tx ransmit D ata
D ata T erminal R eady
S ignal G rou ND
D ata S et R eady
R equest T o S end
C lear T o S end
R ing I ndicator
S ignal LOW
reserviert
S ignal HIGH
reserviert
S ignal G rou ND
6
7
8
9
1
2
3
4
5
reserviert
reserviert
Baud rate Divisor Baud rate Divisor
dec. hex. dec. hex.
2.304.000 1
0001h
19.200 120
0078h
1.152.000 2
0002h
9.600 240
00F0h
460.800 5
0005h
4.800 480
01E0h
230.400 10
000Ah
2.400 960
03C0h
115.200 20
0014h
1.200 1920
0780h
57.600 40
0028h
600 3840
0F00h
38.400 60
003Ch
300 7680
1E00h