Keithley KPCI-3110, User Manual

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2-2 Functional Description KPCI-3110 and KPCI-3116 User’s Manual
This section describes the analog input, analog output, digital I/O, counter/timer, and synchro-
nous features of the KPCI-3110 and KPCI-3116 boards. To frame the discussions, refer to the
block diagram shown in
Figure 2-1. Note that bold entries indicate signals you can access.
Figure 2-1
Block diagram of the KPCI-3110 and KPCI-3116 boards
Analog input features
This section describes the features of the analog input (A/D) subsystem, including the following:
• Analog input resolution
• Analog input channels
• Input ranges and gains
• A/D sample clock sources
• Analog input conversion modes
• Trigger sources and trigger acquisition modes
• Data formats and transfer
• Error conditions
Trigger/Clock
Logic
A/D Counter,
24-bits
D/A Counter
24-bit
TScan Counter
24-bit
Ext A/D Clock
Ext A/D TTL Trig
Ext D/A Clock
Ext D/A TTL Trig
Analog Trigger
20MHz Clock
A/D Trig
A/D Clk
D/A Clk
Buffer
A/D Trig
A/D Clk
A/D Trig Out
A/D Clk Out
Analog In
32 Channel Mux
Ch. Sel
Gain Amp
(1, 2, 4, 8)
12- or 16-bit ADC**
Tristate Buffers
1 kSample
Input FIFO
PCI Bus Interface
PCI Bus
Gain Sel
A/D Clk
DIO Ports
Input Sel
MUX
Ext Analog Trigger
8-bit
DAC
Compare
Ch. Sel
1 K Entry
CGL FIFO
CGL Reg.
Channel
Parameter
Reg.
Gain Sel
Input Sel
12- or 16-
bit DAC**
Bidirectional
8-bit Latch
Bidirectional
8-bit Latch
Output FIFO*
D/A
Clk
20MHz
Clk
Analog Out 1
Analog Out 0
DIO Bank B [7:0]
DIO Bank A [7:0]
User Clk [3:0]
User Gate [3:0]
User Out [3:0]
4 User
Counter/
Timers,
16-bit ea.
Analog Trigger
Output FIFO
Counter
*The KPCI-3110 and KPCI-3116 have a 4 kSample Output FIFO;
**Only the KPCI-3116 has a 16-bit ADC and 16-bit DACs.
12- or 16-
bit DAC**