AS8530-ASOT AMSCO [austriamicrosystems AG], AS8530-ASOT Datasheet - Page 21

• Manufacturer Part Number: AS8530-ASOT
• Description: LIN Transceiver with Integrated Voltage Regulator and MCU Interface for Automotive Applications
• Manufacturer: AMSCO [austriamicrosystems AG]

AS8530
Preliminary Data Sheet - A p p l i c a t i o n I n f o r m a t i o n
If the application doesn’t need the wake up capability of the AS8530, a direct connection EN to V
operates in permanent normal mode. Also possible is the external (outside of the module) control of the EN line via. VSUP signal as shown
below.
Figure 13. Permanent Normal Mode
8.7 Serial Port Interface
The interface is essentially used to trigger the window watchdog, to access test mode and read out diagnostic information for the AS8530. The
description of this interface and the protocol is explained below. Information on block status and errors can be displayed by diagnosis registers.
8.7.1 Device Configuration using 2-Wire Serial Port
The AS8530 device configuration register is programmed via a 2-wire Serial Programming Interface. EN/SCL is used as Serial Clock and TX/
SDA_IO is used as Serial Data. EN is used as clock input to access serial port registers in serial port mode. Also EN is used to control transition
from normal mode to standby/sleep mode. The TX input of the device will be multiplexed as following:
8.7.1.1
A frame is formed by first byte for command and address/configuration and following bit stream that can be formed by an integer number of
bytes. Command is coded RD/WR on the first bits, length of the transfer is indicated by LEN1, LEN2 bits while address is given on LSB 5 bits.
Table 15. Command Bits
Table 16. Transfer Length
www.austriamicrosystems.com/Lin_CompanionIC/AS8530
LEN1
RD/WR
RD/WR
LIN TX for transmitting data from microcontroller on LIN bus
SDA_IO for Serial data input/output, this will be used for serially accessing data from configuration and status register
0
0
1
1
V
0
1
BAT
SP Frame
LEN2
0
1
0
1
Command Bits
Command
LEN1
WRITE
READ
Length
1
2
4
8
Transfer consists of single Data phase. After completion of single Data phase device comes out of Serial
LEN2
ADDRESS
ADDRESS
<A4:A0>
EN
LIN
VSUP
VSS
A4
Revision 0.01
AS8530
Transfer consist of eight Data phase.
Transfer consist of four Data phase.
Transfer consist of two Data phase.
Register Address or Transmission Configuration
Read data byte from the given starting address.
Writes data byte on the given starting address.
RESET
A3
port interface.
Description
VCC
RX
TX
CC
Description
is possible. In this case the AS8530
A2
C
+
load
A1
+ 5V
MCU
A0
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