MP9311 User’s Guide
8
Connecting the Digital Input and Output Lines
The MP9311 is equipped with two logic-level input signals (DIN0/DIN1) and two open-
collector output signals (DOUT0/DOUT1). To activate the digital inputs apply a
minimum 3.0 Volt differential across the DINn+ and DINn-. The outputs require a 4.7K
Ohm pull-up to 5V. See Figure 7 for typical input and output circuits.
Refer to the
SAMSys Forth Programming Language Reference Guide
for programming
information.To set up the I/Os to trigger tag reading and indicated tag sensing, refer to the
CHUMP Reference Guide and the Protocol Configuration Word (PCW) register.
Figure 6–System Connector (SCON1) Digital Input/Output Connections
Figure 7–Typical Digital Input and Output Circuits
DIN0-
DIN1+
DIN1-
DIN0+
DOUT0
DOUT1
1
2
19
20
4.7K
Digital Inputs
DIN0+
DIN0-
4.7K
Typical input
drive circuit
(user supplied)
Vref
DIN1+
DIN1-
Digital Outputs
DOUT0
Filter
4.7K
+5 Vdc
Typical output
pull-up circuit
(user supplied)
DOUT1
Ground
60 V, 500 mA max
Non-inductive
Typical Filter
Filter
(SCON1-8)
(SCON1-5)
(SCON1-6)
(SCON1-7)
(SCON1-9)
(SCON1-11)
(SCON1-12)
(SCON1-10)
Summary of Contents for MP9311 Series
Page 1: ...User s Guide MP9311 Low Power UHF Reader Module THE POWER TO CHOOSE...
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Page 12: ...MP9311 User s Guide 6...
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