29
Appendix A. Specifications
Digital Input /Output (Part 1):
Channels
32 TTL compatible
Number of ports
Port A, Port B, Port C and Port D (8 bits/port)
I/O Configuration
32DI(PA~PD)
(default); 32DO(PA~PD); 16DI(PA~PB) & 16DO (PC~PD); 8DI(PA) &
8DO(PC) (Programmable)
On-board FIFO
16KB for DI & 16KB DO channels
Data Transfer
Mode
Bus Mastering DMA with Scatter-Gather
Data Transfer
Bus Width
8/16/32 bits (programmable)
Max. Transfer
Rate
DI: 80MBytes/sec, 32-bit@20MHz
120MBytes/sec, 32-bit@30MHz external pacer when data
length is less than FIFO size
DO: 80MBytes/sec, 32-bit@20MHz
120MBytes/sec, 32-bit@30MHz external pacer when data
length is less than FIFO size
Transfer
Characteristics
Operation Mode Handshaking
Direction
I/O
Asynchronous 8255 Emulation
Synchronous Burst Handshaking
Clock source for
Burst
Handshaking
Internal: 30MHz, 15MHz, 10MHz, Timer#0 for DI & Timer#1 for DO
External: EXT_CLKIN for DI & EXT_CLKOUT for DO
Handshaking Mode
Samples No. Finite transfer, Continuous I/O
Input
Data Acquisition at a predetermined rate by internal/external clock
Output
Pattern Generation at a predetermined rate by internal/external
clock
Clock Source for
DI
Internal: 30MHz, 15MHz, 10MHz, Timer#0
External: EXT_CLKIN
Clock Source for
DO
Internal: 30MHz, 15MHz, 10MHz, Timer#1
External: EXT_CLKIN
Start Mode
Software command / Trigger signal occurred from DI_STR or
DO_STR / Pattern DI
Normal Mode
Stop Mode
Software command / Trigger signal occurred from DI_STP (for DI)
or DO_STR (for DO) / Pattern DI / "Finite transfers"
Monitor the selected input channel and capture data whenever there is a transition
on one of the channels, and then issue a IRQ
Clock Source for
DI
Internal: 30MHz, 15MHz, 10MHz, Timer#0
External: EXT_CLKIN
Start Mode
Software command / Trigger signal occurred from DI_STR /
Pattern DI
Change Detection
(DI only)
Stop Mode
Software command / Trigger signal occurred from DI_STP /
Pattern DI / "Finite transfers"
Содержание PCI-1755
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