1 i/o configuration, I/o configuration, Table 4-1: i/o configuration – ADLINK PCIe-7300A User Manual
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Operation
Theory
4.1
I/O Configuration
The 32-bit I/O data path of PCI/cPCI/PCIe-7300A can be config-
ured as 8-bit, 16-bit, or 32-bit, the possible configuration modes
are listed as follows.
Note:
X
PORTA is default as Input channel; PORTB is default as
output channel.
X
In DI32 mode, the PORTB has to be configured as the
extension of PORTA, that is, PORTB is the input port
(DI16…DI31). PORTB control signals are disabled.
X
In DO32 mode, the PORTA has to be configured as the
extension of PORTB, that is, PORTA is the output port
(DO16…DO31). PORTA control signals are disabled.
X
DI0: input LSB, DI31: input MSB;
X
DO0:output LSB, DO31:output MSB.
X
LSB: Least Significant Bit, MSB: Most Significant Bit
Mode
Channel
Description
DI32
PORTA (DI0…DI15)
PORTB (DI16..DI31)
Both PORTA and PORTB are
configured as input channel
DO32
PORTA (DO16…DO31)
PORTB (DO0…DO15)
Both PORTA and PORTB are
configured as output channel
DI16DO16
(default mode)
PORTA (DI0…DI15)
PORTB (DO0…DO15)
PORTA is 16-CH input
PORTB is 16-CH output
DI16DO8
PORTA (DI0…DI15)
PORTB (DO0…DO7)
PORTA is 16-CH input
PORTB is 8-CH output
DI8DO16
PORTA (DI0…DI7) PORTB (DO0…DO15)
PORTA is 8-CH input
PORTB is 16-CH output
DI8DO8
PORTA (DI0…DI7) PORTB (DO0…DO7)
PORTA is 8-CH input PORTB
is 8-CH output
Table 4-1: I/O Configuration