Broadcom AEDR-9820 User manual

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April 9, 2020
AEDR-9820 & 9830
Evaluation Board User Guide
User Guide
Version 1.0

AEDR-9820 & 9830 User Guide Evaluation Board User Guide
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AEDR-9820 & 9830 User Guide Evaluation Board User Guide
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Table of Contents
1.0 Top and Bottom Views .......................................................................................................................................4
2.0 Select Options ....................................................................................................................................................6
2.1 Selection Table ....................................................................................................................................................6
3.0 Board Schematic & Pin Assignment.................................................................................................................7
3.1 Connector Assignment................................................................................................Error! Bookmark not defined.
3.1 Connector Assignment.........................................................................................................................................8
4.0 Code Wheel Drawing ........................................................................................................................................10

1.0 Top and Bottom Views
Figure 1 Bottom Side of the PCB
Figure 2 Top Side of the PCB (Left 318 LPI & Right 225 LPI)
NOTE Please remove the protective kapton tape covering the encoder ASIC before use.
Mounting slot
Mounting hole
Code wheel OD
alignment guide lines

The silk screen printed guide line on the PCB is to help in providing visual alignment of the code wheel edge (outer
diameter) for each of the different Rop (CPR) track. A sample diagram showing the position when encoder is aligned to
625 CPR track is as shown in Figure 3 below.
Figure 3 Bottom Side of the PCB
Figure 4 Sample Evaluation Board Mounting with reference to Code Wheel

2.0 Select Options
2.1 Selection Table
Table 1 Selection Table for 318 LPI AEDR-9830 Variant
Table 2 Selection Table for 225 LPI AEDR-9820 Variant
SEL1
SEL 2
INDEX
SEL
Interpolation
Factor
Index
Max output
frequency
CPR @ROP
7.95mm
CPR @ROP 11
mm
Open
Open
Low
1X
Gated 90 deg
200 kHz
625
865
High
Gated 180 deg
Open
Ungated raw
Open
Low
Low
2X
Gated 90 deg
400 kHz
1250
1730
High
Gated 180 deg
Open
Gated 360 deg
High
High
Low
4X
Gated 90 deg
800 kHz
2500
3460
High
Gated 180 deg
Open
Gated 360 deg
Low
Low
Low
8X
Gated 90 deg
1.6 MHz
5000
6920
High
Gated 180 deg
Open
Gated 360 deg
High
Low
Low
16X
Gated 90 deg
2.0 MHz
10000
13840
High
Gated 180 deg
Open
Gated 360 deg
Open
High
NA
Analog (500mVpp)
Analog
200 kHz
NA
NA
Low
High
NA
Analog 1Vpp
Ungated Digital
High / Low
Open
NA
Analog 1Vpp
Analog
SEL1
SEL 2
INDEX
SEL
Interpolation
Factor
Index
Max output
frequency
CPR @ROP
4.6 mm
CPR @ROP 11
mm
Open
Open
Low
1X
Gated 90 deg
200 kHz
256
612
High
Gated 180 deg
Open
Ungated raw
Open
Low
Low
2X
Gated 90 deg
400 kHz
512
1224
High
Gated 180 deg
Open
Gated 360 deg
High
High
Low
4X
Gated 90 deg
800 kHz
1024
2448
High
Gated 180 deg
Open
Gated 360 deg
Low
Low
Low
8X
Gated 90 deg
1.6 MHz
2048
4896
High
Gated 180 deg
Open
Gated 360 deg
High
Low
Low
16X
Gated 90 deg
2.0 MHz
4096
9792
High
Gated 180 deg
Open
Gated 360 deg
Open
High
NA
Analog (500mVpp)
Analog
200 kHz
NA
NA
Low
High
NA
Analog 1Vpp
Ungated Digital
High / Low
Open
NA
Analog 1Vpp
Analog

3.0 Board Schematic & Pin Assignment
Figure 5 Evaluation Board Schematic

3.1 Connector Assignment
Table 3 : Connector 1 Pin Assignment
Connector 1 (Top Side)
Label
1
NC
2
NC
3
NC
4
NC
5
INDEX_P/I+
6
INDEX_P/I-
7
VSSA/AGND
8
VDDA/VCC
9
CH_A/A+
10
CH_AB/A-
11
VDD
12
VSSD/DGND
13
CH_B/B+
14
CH_BB/B-
15
NC
16
NC
17
NC
18
NC
The finger design of Connector 1 is match to the following connectors:
1. EDAC, CONN EDGE DUAL FMALE 36POS 0.100, P/N# 395-036-520-202 or,
2. SULLINS, CONN EDGE DUAL FMALE 36POS 0.100, P/N# EBC18DREH
The use of the above mentioned card edge connector is not needed if necessary connections can be made via manual
soldering to the relevant card edge fingers.

Table 4 Connector 2 Pin Assignment
NOTE Please refer to Table 1 (AEDR-9830 318 LPI) or Table 2 (AEDR-9820 225 LPI) for the various
selection options available by changing the respective jumper position.
Connector 1 (Top Side)
Label
State
1
SEL1
VCC
2
AGND
3
OPEN
4
SEL2-
VCC
5
AGND
6
OPEN
7
INDEX_SEL
VCC
8
AGND
9
OPEN
10
NC

4.0 Code Wheel Drawing
For AEDR-9830 evaluation board sample, the matching code wheel sample drawing is as shown in Figure 4 below.
Figure 6 318 LPI 4-track (CPR) code wheel drawing
For AEDR-9820 evaluation board sample, the matching code wheel sample drawing is as shown in Figure 5 below.
Figure 7 225 LPI 4-track (CPR) code wheel drawing
For the detailed drawing of the sample code wheel, please do request from regional FAE.

Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
Broadcom Limited:
HEDS-9820EVB HEDS-9830EVB