SIS Documentation
SIS3820
VME Scaler
Page 40 of 79
7.19 Copy disable register (0x104)
#define SIS3820_COPY_DISABLE 0x104 /* read/write; D32 */
This read/write register allows for exclusion of channels from the LNE (MCS mode )
The full copy loop is executed in pattern mode. Channels with their corresponding bit set in
the copy disable register are excluded from the copy process.
The minimum dwell time depend on the number of active channels and the selected data
format (refer to section 15.2 for a table of measured minimum dwell times).
Bit Function
31
copy disable bit channel 32
... ...
0
copy disable bit channel 1
Examples: If 0xFFFF is written to the copy disable register, channels 17 through 32 data
will be copied to memory, if 0xFFFF0000 is set channels 1 through 16 will be stored.
Note on copy disable behavior/limitations:
Data forma
Copy disable behavior/limitations
32 or 24-bit
Arbitrary channels can be disabled in a
selective fashion
16-bit
Groups of 2 channel pairs are copied
Ch1 and 2, Ch2 and 4 e.g.
The corresponding dual channel group is
copied if the disable bit of the first channel of
the group (Ch1, 3, e.g.) is not set
8-bit
Groups of 4 channel are copied
Ch1, 2, 3 and 4, Ch5, 6, 7 and 8 e.g.
The corresponding four channel group is
copied if the disable bit of the first channel of
the group (Ch1, 5, e.g.) is not set
