ASI4U_12 Datasheet, PDF (23/64 Pages) List of Unclassifed Manufacturers – 3.0 Compliant Universal AS-I IC

ASI4U / ASI4U-E / ASI4U-F
Spec. 3.0 Compliant Universal AS-I IC
2.4. Master Mode
Master Mode and the related Repeater- and Monitor-Modes differ completely in their functional properties
from the Slave Mode. While the IC can autonomously perform different tasks in Slave Mode, it will only act as
physical layer transceiver in Master-, Repeater- and Monitor-Mode. The basic property of these modes is a
modulation / demodulation of AS-i signals to Manchester-II-code and vice versa. The following figure shows
the different data path configurations.
Master Mode
Slave Mode, ASI-Channel
Slave Mode, IRD Addressing Channel
ASI+
ASI-
ASI- Receiver
UART
IRD CMOS
IRD
Input
(TX)
ASI- Transmitter
LED Output
LED1
(RX)
Figure 6: Data path in Master-, Repeater- and Monitor-Mode
Master-Mode, Repeater-Mode and Monitor-Mode differ from each other in the kind of signals that are
available at the data I/O and parameter port pins of the IC. Following signal assignments are provided:
Pin
P0
P1
P2
P3
DI0
DI1
DI2
DI3
DO0
DO1
DO2
DO3
Master Mode
Repeater Mode
Monitor Mode
Receive Clock
Hi-Z
Receive Clock
Power Fail
Hi-Z
Power Fail
Receive Strobe – Slave Telegram Hi-Z
Receive Strobe – Slave Telegram
Hi-Z
Hi-Z
Receive Strobe – Master Telegram
Inverting of IRD input signal. If both inputs are on different level, the IRD input signal is inverted
before further processing, otherwise it is directly forwarded to the UART.
Inverting of LED output signal. If both inputs are on different level, the LED output signal is in-
verted after processing, otherwise it is directly forwarded to the LED1 output.
Hi-Z
Hi-Z
Pulse Code Error
Hi-Z
Hi-Z
No Information Error
Hi-Z
Hi-Z
Parity Bit Error
Hi-Z
Hi-Z
Manchester-II-Code Error at IRD Input
More detailed signal descriptions can be found in chapters 3.6 Parameter Port and PST, 3.7 Data Port and
DSR as well as 3.12 UART.
Data Sheet
April 2, 2012
© 2012 Zentrum Mikroelektronik Dresden AG — Rev. 2.2
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 subject to changes without notice.
23 of 63