SAP51C-A-G1-R ZMDI, SAP51C-A-G1-R Datasheet - Page 54

• Manufacturer Part Number: SAP51C-A-G1-R
• Description: Interface - Specialized ASI
• Manufacturer: ZMDI

Specifications of SAP51C-A-G1-R

• Rohs: yes
• Product Type: Actuator Sensor Interface IC
• Operating Supply Voltage: 16 V to 34 V
• Supply Current: 6 mA
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: SOP-20
• Minimum Operating Temperature: - 25 C

4.19.3. Functional Description
In Master/Repeater Mode the SAP5 provides a simple physical-layer interface function between the AS-I line
and an external binary channel.
The signal RX_DAT represents the Manchester-II-coded, re-synchronized equivalent of the telegram signal
received at the AS-i input channel. Polarity of that bitstream depends on the programmed operation mode
according to Table 37.
Table 37: Functional Distinctions of SAP5 Master- and Repeater Mode
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 inactive for a time period defined by t
The signal TX_DAT is directly forwarded to the AS-i line transmitter avoiding any additional logic delays.
In case the Loopback Mode is not active, the AS-i receiver gets disabled as long as the SAP5 is transmitting
an AS-i signal. Otherwise, the transmitted signal is read back in parallel and provided at the RX_DAT output
for checkup purposes.
The Loopback time t
Transmitter. However, an additional delay of up to 1875ns may be inserted if necessary. Therefore, the
ID_Code_Extension_2 EEPROM register has to be programmed as described below.
NOTE: The ID_Code_Extension_2 has to be programmed before programming of the Master_Mode flag.
Once the Master_Mode flag is set to logic HIGH, the slave functionality of the SAP5 is no longer available,
preventing any write access to the E²PROM by use of AS-i master requests as described on page 26.
Table 38: Programmable Variation of the Loopback time
Data Sheet
October 20, 2011
Repeater Mode
Master Mode 1
Master Mode 2
ID_Code_Extension_2
(ID2_Bit3 … ID2_Bit0)
SAP5S / SAP51
Universal Actuator-Sensor Interface IC
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
© 2011 Zentrum Mikroelektronik Dresden AG — Rev. 3.0
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.
RX_DAT in case of ASI
LOOPBACK
Modulation of signal
Power Fail
OFF
OFF
is mainly defined by the analog signal processing within the Receiver and the
ON
t
+1000
+1125
+1250
+1375
+1500
+1625
+1750
+1875
+125
+250
+375
+500
+625
+750
+875
loopback
0
Loopback Mode
Unit
ns
OFF
ON
ON
BREAK
(refer to Table 39).
Polarity of signal RX_DAT
active HIGH
active HIGH
active LOW
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