SP-5000M-USB / SP-5000C-USB
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5.5.1 Clock Pre-scaler
Clock pre-scaler (Divide Value) can set the dividing value of the frequency divider (12-bit
length) and the pixel clock is used for this. Two built-in pulse generators work by the same
clock. In the SP-5000-USB, the pixel clock is 48 MHz.
5.5.2 Pulse Generator Selector
This is where you select one of the pulse generators in order to set or modify its
parameters.
Table13. Pulse Generator setting
Fig.11
Pulse Generator Pulse construction
5.5.3 Pulse Generator Length
Set the counter up value (number of clocks, refer to Table 14) for the selected pulse generator.
If Repeat Count value is “0”, and if Pulse Generator Clear signal is not input, the pulse
generator generates the pulse repeatedly until reaching this counter up value.
5.5.4 Pulse Generator Start Point
Set the active output start count value for the selected pulse generator.
However, please note that a maximum 1 clock jitter can occur for the clock which is divided in the
clock pre-scaler.
5.5.5 Pulse Generator End Point
Set the active output ending count value for the selected pulse generator.
Pulse generator
length
Pulse generator Start point
Pulse generator End point
Pulse generator repeat count = N
(Pulse generator length x N)
Pulse generator
Clear source IN
(Clear activation
= Rising edge
Clear SYNC mode
= Async)
Pulse generator
Output
Pulse generator
length
Pulse generator
length
0
0
0
Trigger Selector
item
Description
Pulse Generator 0
If Pulse Generator 0 is selected, Length Start Point, End Point, Repeat Count, Clear Source, Clear
Inverter Clear Activation and Clear Sync Mode of pulse generator 0 are displayed under the
selector.
Pulse Generator 1
If Pulse Generator 1 is selected, Length Start Point, End Point, Repeat Count, Clear Source, Clear
Inverter Clear Activation and Clear Sync Mode of pulse generator 1 are displayed under the
selector.
