User's Manual

10
Revision 1.1, Copyright © 2014, Impinj, Inc.
4.5 Device Input and Output Specifications
Table 5-7: Indy RS500 – Digital Interface Specification
Parameter
Min.
Typ.
Max.
Unit
Conditions
nRST
V
IL
-0.3
0.8
V
V
IH
2
3.6
V
Hysteresis voltage
200
mV
Internal pull-up resistor
25
40
55
kΩ
Reset pulse width
25
µs
BOOT0
V
IL
0.0
0.6
V
V
IH
0.62
3.6
V
Hysteresis voltage
300
mV
WKUP
V
IL
-0.3
1.0
V
V
IH
1.8
3.6
V
Hysteresis voltage
200
mV
Internal pull-down resistor
25
40
55
kΩ
Digital inputs
V
IL
-0.3
1.0
V
V
IH
1.8
3.6
V
Hysteresis voltage
200
mV
Pull-up and pull-down resistor
25
40
55
kΩ
Digital outputs
V
OL
0.0
0.4
V
V
OH
2.7
3.6
V
Drive current (sink or source)
8
mA
UART
Baud rate
115.2
kbaud
Parity
None