Справочник Пользователя для Spectrum Brands MI.61XX
Clock generation
Internally generated sample rate
(c) Spectrum GmbH
57
Example:
External clock with divider
The extra clock divider can be used to divide an external fed in clock by a fixed value. The external clock must be > 1 MS/s. This divided
clock is used as a sample clock for the board.
clock is used as a sample clock for the board.
Available divider values
The clock divider is also used by internal clock generation for all clock rates that are below 1 MS/s sum sam-
ple rate per module. If internal clock divider and extra clock divider are used together the resulting clock
divider is one value of the above listed. The driver searches for the best matching divider. Read out the regi-
ster after all sample rate registers are set to receive the resulting extra clock divider. For correct setting of the clock
divider the sample rate and channel enable information must be set before the clock divider is programmed.
ple rate per module. If internal clock divider and extra clock divider are used together the resulting clock
divider is one value of the above listed. The driver searches for the best matching divider. Read out the regi-
ster after all sample rate registers are set to receive the resulting extra clock divider. For correct setting of the clock
divider the sample rate and channel enable information must be set before the clock divider is programmed.
SpcSetParam (hDrv, SPC_CHENABLE, CHANNEL0 | CHANNEL1 | CHANNEL2 | CHANNEL3); // activate all 4 channels
SpcSetParam (hDrv, SPC_EXTERNALCLOCK, 1); // activate external clock
SpcSetParam (hDrv, SPC_EXTERNRANGE, EXRANGE_BURST_M); // set external range to Burst M
SpcSetParam (hDrv, SPC_EXTERNALCLOCK, 1); // activate external clock
SpcSetParam (hDrv, SPC_EXTERNRANGE, EXRANGE_BURST_M); // set external range to Burst M
Register
Value
Direction
Description
SPC_CLOCKDIV
20040
r/w
Extra clock divider for external samplerate. Allowed values are listed below
1
2
4
8
10
16
20
40
50
80
100
200
400
500
800
1000
2000