Contec COM-2DL-PCI, User Manual, Page: 61 / 62

6. About Hardware
54
COM-2PD(PCI)H, COM-4PD(PCI)H
Differences from COM-2PD(PCI)
The COM-2PD(PCI)H is the upgraded versions of the conventional COM-2PD(PCI) board, respectively.
The COM-2PD(PCI)H is backward compatible with the COM-2PD(PCI) and can be used in the same
way in principle.
In specifications, the COM-2PD(PCI)H board is different from the COM-2PD(PCI) board as listed
below.
For details on the on-board controller chip, refer to the data sheet from EXAR Corporation.
Table 6.3. Differences in Specifications
COM-2PD(PCI) COM-2PD(PCI)H
FIFO buffer for
transmission and reception 16-byte 128-byte
Controller chip 16552 or equivalent 162850 or equivalent
Power consumption 670mA 550mA
Weight 110g 95g
Table 6.4. Differences in Hardware
Data transmission
mode setting swich
COM-2PD(PCI) COM-2PD(PCI)H
The meaning of each switch bit is the same for each model.
See the data transfer mode settings in Chapter 2 for details.
SW3
(Data transfer mode
settings for CH2)
SW5
(Data transfer mode
settings for CH2)
SW3
(Data transfer mode
settings for CH1)
SW2
(Data transfer mode
settings for CH1)
ON
1
3
2 4
5
6
78
Terminator
setting swich
SW3
(Terminator settings for CH2)
SW4
(Terminator settings for CH2)
SW2
(Terminator settings for CH1)
SW2
(Terminator settings for CH1)
6, 7 bit 1, 2 bit
The meaning of each of the above switch bits is the same.
On the COM-2PD(PCI)H, the terminators for transmission (TxD and RTS) are
set by bits 3 and 4.
See the terminator settings in Chapter 2 for details.
ON
1
3
2 4
5
6
ON
1
3
2 4
5
6
78
ON
1
3
2 4
5
6
ON
1
3
2 4
5
6
78
ON
1
3
2 4
ON
1
3
2 4
5
6
78
ON
1
3
2 4