Guppy PRO Technical Manual
V4.1.2
221
Extended shutter
The exposure time for long-term integration of up to 67 seconds can be
entered with µs precision via the EXTENDED_SHUTTER register.
The minimum allowed exposure time depends on the camera model. To
determine this value write 1 to the ExpTime field and read back the minimum
allowed exposure time.
The longest exposure time, 3FFFFFFh, corresponds to 67.11 seconds.
ID
Time base in µs
0
1
1
2
2
5
3
10
4
20
Default value
5
50
6
100
7
200
8
500
9
1000
Table 128: : Time base ID
Note
The ABSOLUTE VALUE CSR register, introduced in IIDC V1.3, is
not implemented.
Register
Name
Field
Bit
Description
0xF100020C
EXTD_SHUTTER
Presence_Inq
[0]
Indicates presence of this
feature (read only)
---
[1 to 5] Reserved
ExpTime
[6 to 31] Exposure time in µs
Table 129: : Advanced register: Extended shutter
