Mikrotron MC132x Especificaciones descargar pdf (Pagina 22)

Configuration MC132x Users Manual Rev. 0.23

6.6.1 Arbitrary selection of sensor and pixel clock

Sensor and pixel clock can be set to any value, the product of: (sensor clock • line length/1280) must

always be smaller (about 10%) than the qoutient: (pixel clock / 2).

Command :S <x

> <x

> ... 6 characters, as described in

chapter Frequency selection

Response: ACK if enabled by separate command :A<n>

6.6.2 Image Format/Speed change

There are several steps necessary for a change of image format:

i. Disable sensor controller with :r6[4] = 0.

ii. Set image size with (:r1,:r2, :r3, :r4, :r5).

iii. If new sensor clock = old sensor clock:

1. Do not set pixel clock nor sensor clock.

iv. If new sensor clock > old sensor clock:

1. Set new pixel clock (:S6…..), then new sensor clock (:S4….).

v. If new sensor clock < old sensor clock:

1. Set new sensor clock (:S4…..), then new pixel clock (:S6….).

vi. Reenable sensor controller (:r6[4]=1).

6.7 Exposure control

Exposure control is selected with register r6[7..4] and register r2[9..0].

Bit(s) Description

r6[7..4] Type of exposure

r2[9..0] Exposure time

table 6-1

6.7.1 Type of exposure

The MC132x can expose the images synchronous or asynchronous. An external signal on CC1 can be

used to synchronize MC132x cameras to each other or to an external event.

6.7.1.1 Synchronous exposure

Synchronous exposure means that the next image is exposed, while the current image is output. This

mode provides fastest frame rate while maintaining maximum exposure time as long as 1/frame rate. If

an external synchronization signal is input on CC1 its frequency range can be between 30Hz and the

selected free running frame rate. Use MC13xx camera configuration tool for selection.

6.7.1.2 Asynchronous exposure

With asynchronous exposure, an external signal starts exposure, and the exposed image is output imme-

diately after the exposure ends. Exposure time is defined either by an internal timer or by the width of

the external EXP (CC1) signal. The time between two consecutive EXP (CC1) edges can be indefinite.

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