ProDAQ 3424 Function Card User Manual
3424-XX-UM
Copyright,
1998-2005 Bustec Production Ltd.
Page 43 of 56
FIFO_WRL register can be used as a general read/write register to test the access to function card
registers.
Bit
Access &
Default
Description
15:0
R/W
FIFO_DI
– FIFO Data Input
Lower 16 bits (FIFO_DI[15:0]) of the FIFO data input. The write to the FIFO is
started after the write to the FIFO_WRH register.
5.10. FIFO_WRH
– FIFO Write High Register
This register is used to write the data to FIFO. Writing to FIFO is allowed in IDLE_ST only. The
data can be written to FIFO or to offset register in FIFO, depending on the state of FIFO_LD bit.
Bit
Access &
Default
Description
15:0
WO
FIFO_DI
– FIFO Data Input
Upper 16 bits (FIFO_DI[31:16]) of the FIFO data input. Write FIFO_WRL register
first.
5.11. PRET_NOS
– Pre-Trigger Number of Scans Register
This register defines number of scans to be acquired in the pre-trigger if pre-trigger mode has been
enabled. When pre-trigger mode is disabled, contents of this register is ignored. The number of
pre-trigger scans is in the range from 0 to 65535.
Bit
Access &
Default
Description
15:0
R/W
PRET_NOS
– Pre-trigger Number Of Scans
Write
Sets the pre-trigger number of scans to collect
Read
Returns the number of scans left to complete the pre-trigger if the pre-trigger has
been ended before the completion
5.12. POSTT_NOSL
– Post-Trigger Number of Scans Low Register
The POSTT_NOSL/H registers define the number of scans to be acquired during Data Acquisition
if the mode with number of scans has been selected (DA_STOPSEL=’00’). The number of post-
trigger scans is in the range from 0 to 16777215
.
Bit
Access &
Default
Description
15:0
WO
POSTT_NOS
– Post-trigger Number Of Scans
Lower 16 bits (POSTT_NOS[15:0]) of the post trigger number of scans to collect.
5.13. POSTT_NOSH
– Post Trigger Number of Scans High Register
The POSTT_NOSL/H registers define the number of scans to be acquired during Data Acquisition
if the mode with number of scans has been selected (DA_STOPSEL=’00’). The number of post-
trigger scans is in the range from 0 to 16777215
.