ASI4UC-G1-SR-7 ZMDI, ASI4UC-G1-SR-7 Datasheet - Page 32

• Manufacturer Part Number: ASI4UC-G1-SR-7
• Description: Interface - Specialized ASI
• Manufacturer: ZMDI

Specifications of ASI4UC-G1-SR-7

• 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

3.6. Parameter Port and PST Pin
3.6.1.
The parameter port is configured for continuous bi-directional operation. Every pin contains an NMOS open
drain output driver plus a high voltage high impedance digital input stage. Received parameter output data is
stored at the Parameter Output Register and subsequently forwarded to the open drain output drivers. A
certain time (t
The input value either results from a wired AND combination of the parameter output value and the signals
driven to the port by external sources (Multiplex_Parameter =’0’) or simply represents the externally driven
input signals (Multiplex_Parameter =’1’). For further explanation see also Figure 9 and chapter 3.6.2.
The availability of new parameter output data is signaled by the Parameter Strobe (PST) signal.
Besides the basic I/O function, the first parameter output event after an IC reset has an additional meaning. It
enables the data output at the Data Port (see chapters 3.7 and 3.11).
Any IC reset or the reception of a Delete_Address call turns the Parameter Output Register to 0xF and forces
the parameter output drivers to high impedance state. Simultaneously a Parameter Strobe is generated,
having the same t
Table 16: Timing Parameter Port
Symbol Parameter
t
t
t
t
t
1
2
3
4
Data Sheet
January 30, 2012
setupL
setupH
hold
PST
PI-latch
The designed value is 0.5µs.
t
The timing of the resulting voltage signal also depends on the external pull up resistor.
The parameter input data must be stable within the period defined by min. and max. values of t
hold
ASI4U / ASI4U-E
Spec. 3.0 Com
is only valid, if the Multiplex_Parameter flag is set in the Firmware Area of the E²PROM.
PI0..PI3
P0..P3
PST
Output data is valid LOW before PST-H/L
Output driver is at high impedance state before PST-H/L
Output driver is at high impedance state after PST-H/L
Pulse width of Parameter Strobe (PST)
Acceptance of input data
Slave Mode
PI-latch
© 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.
setup
) after new output data has arrived at the port, the corresponding inputs are sampled.
pliant Universal AS-I IC
timing and t
t
Figure 9: Timing Diagram Parameter Port P0 ... P3, PST
setup
PST
parameter port output data
parameter port input data
pulse width, as new output data would be driven.
t
PST
t
PI-latch
t
hold
data remains constant,
if Multiplex_Parameter
flag is not set
min
Min
0.1
0.1
0.1
5
11
Hi-Z, if Multiplex_Parameter
flag is set
keep stable
max
13.5
Max
0.6
0.6
0.6
6
Unit
µs
µs
µs
µs
µs
PI-latch
32 of 63
Note
1
1
1, 2
3
4
.