Instruction manual

Configuration of the camera

MARLIN Technical Manua

Page 101

11.4.4 Timebase

Corresponding to IIDC, exposure time is set via a 12-bit value in the corresponding register

(SHUTTER_INQ [51Ch] and SHUTTER [81Ch]).

This means that a value in the range of 1 to 4095 can be entered.

Marlin cameras use a time-base which is multiplied by the shutter register value. This multiplier

is configured as the time base via the TIMEBASE register.

Offset Name Field Bit Description

0xF1000208 TIMEBASE Presence_Inq [0] Indicates presence

of this feature

(read only)

--- [1..27]

Timebase_ID [28..31]

Table 64: Timebase configuration register

IDs 0-9 are in bits 28 to 31. Refer to the following table for code. Default time-base is 20µs.

This means that the integration time can be changed in 20 µs increments with the shutter

control.

Time-base can only be changed when the camera is in idle state and becomes active only after

setting the shutter value.

ID Timebase ID Timebase

0 1 µs 5 50 µs

1 2 µs 6 100 µs

2 5 µs 7 200 µs

3 10 µs 8 500 µs

4 20 µs 9 1000 µs

Table 65: Timbease ID

 The ABSOLUTE VALUE CSR register, introduced in IIDC v. 1.3, is not implemented.