  The RD50-CMOS group aims to design and study High Voltage CMOS (HVCMOS) chips
for use in a high radiation environment. Currently, measurements are performed
on RD50-MPW2 chip, the second prototype developed by this group. The active
matrix of the prototype consists of 8x8 pixels with analog front end. Details
of the analog front end and simulations have been already published earlier.
This contribution focuses on the Caribou based readout system of the active
matrix. Each pixel of the active matrix can be readout one after the other.
Relevant aspects of hardware, firmware and software are introduced. As a first
stage, firmware for a standalone setup is introduced and details on data flow
are given. Afterwards, a second stage of the firmware capable of synchronizing
with other detectors and accepting triggers is presented, focusing on operation
of the chip in combination with a tracking telescope to measure efficiency and
residuals.
