Datasheet
UG-365 AD2S1200/AD2S1205 User Guide
Rev. D | Page 6 of 24
PARALLEL/SERIAL INTERFACE
In the default configuration, information is transferred to the
EVA L-SDP-CB1Z via the parallel interface.
SOCKETS/CONNECTORS
There is one SMB input socket, J1, on this evaluation board.
This socket allows external clock frequencies to be applied to
the EVA L -AD2S1200/05SDZ board. The on-board 8.192 MHz
crystal should be removed if an external clock is used.
There are nine connectors on the E VA L -AD2S1200/05SDZ
board, as outlined in Table 3.
Table 3. On-Board Connectors
Connector Function
J2 120-way connector for EVAL-SDP-CB1Z interface
J3 External 26-way connector for parallel operation
J4
External 8-way connector for serial operation
J5 Connector for SIN, SINLo, COS, and COSLo inputs
J6 Connector for EXC and
EXC
outputs
J500 External 12 V and AGND power connector
J701 External DVDD and DGND power connector
J702 9 V, 2.0 mm dc jack connector
J703 External AVDD and AGND power connector
The default interface to this evaluation board is via the 120-way
connector, which connects the E VA L-AD2S1200/05SDZ to the
EVA L-SDP-CB1Z board.
Additional options for interfacing with the evaluation board are
via J3, a 26-way connector, or via J4, an 8-way connector. These
connectors are provided to allow the evaluation board to be
interfaced with systems other than the Analog Devices EVA L -
SDP-CB1Z board. The 26-way connector, J3, is provided for use
in parallel mode. The 8-way connector, J4, is provided for use in
serial mode. The pin designations for both connectors are
shown in Table 4 and Table 5, respectively.
TEST POINTS
There are numerous test points on the EVA L -AD2S1200/05SDZ
board. These test points enable the user to have easy access to
the signals from the evaluation board, the external sensor, and
the controller board for probing, evaluation, and debugging.
Table 4. Pin Designations for 26-Way Connector J3
Pin No. Row A Row B
1 DB0 DB1
2 DB2 DB3
3 DB4 DB5
4 DB6 DB7
5 DB8 DB9
6 DB10 DB11
7 RST DGND
8 DIR NM
9 B A
10
DGND
DGND
11 LOT DOS
12 DGND DGND
13 DVDD DVDD
Table 5. Pin Designations for 8-Way Connector J4
Pin No. Row A Row B
1
RD
CS
2
SAMPLE
RDVEL
3 SCLK SO
4 DGND DVDD
ENCODER
The AD2S1200 and AD2S1205 emulate a 1024-line encoder
and a DIR direction output pin. These outputs allow the angular
position to be determined without the need for parallel or serial
communication interfaces. For ease of analysis, these outputs
are wired to on-board LEDs on the EVA L -AD2S1200/05SDZ
board. The status of these outputs can also be monitored via the
J3 connector. See Table 4 for the connector pinout.
FAULT DETECTION
The AD2S1200 and AD2S1205 devices contain on-chip fault
detection. The fault status is flagged via the LOT and DOS output
pins. For ease of analysis, these outputs are wired to on-board
LEDs on the EVA L-AD2S1200/05SDZ board. The status of
these outputs can also be monitored via the J3 connector. See
Table 4 for the connector pinout.