Doc: UM0520
Issue: 3.0
Date: 07/01/2002
Page: 3/9
Author: PJM
2. COMMAND SET
Note. - Because the unit has 1 - 4 channels and an optional comparator, links
are used to define the configuration, which also govern the Q and X responses.
Command Meaning Response
F(0) A(0) Read ch 1 data X=1, Q=1 if Data Ready
F(0) A(1) Read ch 2 data X=1, Q=1 if Data Ready
(only if fitted)
F(0) A(2) Read ch 3 data X=1, Q=1 if Data Ready
(only if fitted)
F(0) A(3) Read ch 4 data X=1, Q=1 if Data Ready
(only if fitted)
F(1) A(0) Read Control Register X=1, Q=1
F(8) A(15) Test LAM X=1, Q=LAM
F(16) A(0) Write Comparator X=1, Q=Accepted-Data Ready
(only if fitted)
This command (F(16) A(0)) also loads the gain control bits for the alternative use
of the comparator register in the ADC 521. Bit W1 corresponds to Channel 1, W2 =
Channel 2 etc.
F(16) A(15) Write Test Mode Data X=1, Q=1
into all Data Registers,
disable ADC's, enter Test Mode
F(17) A(0) Write Control Register X=1, Q=1
F(24) A(0) Disable LAM X=1, Q=0
F(26) A(0) Enable LAM X=1, Q=0
F(27) A(0) Test LAM Enabled X=1, Q=Enabled
F(25) A(15) Reset, Exit Test Mode X=1 Q=0
