ASI4UC-G1-MT ZMDI, ASI4UC-G1-MT Datasheet - Page 47

• Manufacturer Part Number: ASI4UC-G1-MT
• Description: Interface - Specialized ASI
• Manufacturer: ZMDI

Specifications of ASI4UC-G1-MT

• Product Category: Interface - Specialized
• Rohs: yes
• Product Type: Actuator Sensor Interface IC
• Operating Supply Voltage: 16 V to 33.1 V
• Supply Current: 6 mA
• Maximum Power Dissipation: 850 mW
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: SSOP-28
• Minimum Operating Temperature: - 25 C

As mentioned above, Pin LED2 is deactivated in Normal - Standard Status Indication Mode (Extended_Sta-
tus_Indication = ‘0’ and Dual_LED_Mode = ‘0’) for downward compatibility. In this case, the green LED shall
be connected directly to pin UOUT or different sensor supply.
3.9.2.
As soon as the Addressing Channel becomes activated for telegram communication (see chapter
3.3 Addressing Channel Input IRD on page 28), LED1 is operated as Addressing Channel output port. This
output mode takes precedence over any status indication at LED1. If the Dual_LED_Mode flag is set, LED2 is
switched inactive (high impedance) while the Addressing Channel is active. This is to avoid interference to the
data communication by mixed optical signals.
3.9.3.
In Master-, Repeater- and Monitor Mode LED1 provides the Manchester-II-coded, re-synchronized equivalent
of the telegram signal received at the AS-i input channel. The polarity of the Manchester-II-coded bit stream
depends on the values of the Pins DI2 and DI3.
Table 28: Polarity of Manchester-II-Signal at LED1
Note: The complemented definition was chosen to retain backward compatibility to A²SI based AS-i Master
designs.
Every received AS-i telegram is checked for consistency with the protocol specifications and timing jitters
become removed as long as they stay within the specified limits. In case a telegram error is detected, the
output signal becomes disturbed in such a way that following logic can also recognize the MAN output signal
being erroneous.
LED2 is always logic HIGH (high impedance) in Master-, Repeater- and Monitor Mode to reduce internal
power dissipation of the IC. In such applications, the green LED shall be connected to Pin UOUT or different
supply levels.
3.10. Oscillator Pins OSC1, OSC2
Table 29: Oscillator pin parameters
1
Data Sheet
January 30, 2012
Symbol
V
C
C
V
V
for external clock applied to OSC1
Input values at
DI2 and DI3 are:
Equal
(“11”, “00”)
Unequal
(“01”, “10”)
ASI4U / ASI4U-E
Spec. 3.0 Com
OSC_IN
IL
IH
OSC
LOAD
Communication via Addressing Channel
Master-, Repeater-, Monitor Mode
Parameter
Input voltage range
External parasitic capacitor at oscillator pins OSC1,
OSC2
Dedicated load capacity
Input ”low” voltage
Input ”high” voltage
© 2012 Zentrum Mikroelektronik Dresden AG — Rev. 2.1
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without
the prior written consent of the copyright owner. The information furnished in this publication is PRELIMINARY and subject to
changes without notice.
pliant Universal AS-I IC
Description
Manchester-II-Signal is high active (default logic output value at no
communication is ‘0’). This mode is compatible to the A²SI LED output
Manchester-II-Signal is low active (default logic output value at no
communication is ‘1’).
Min
-0.3
0
0
3.5
Typ.
12
Max
V
8
1.5
V
U5R
U5R
Unit
V
pF
pF
V
V
47 of 63
Note
1
1