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AS8221-ASSP Datenblatt(PDF) 18 Page - ams AG

Teilenummer AS8221-ASSP
Bauteilbeschribung  FlexRay Standard Transceiver
PDF  42 Pages
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Hersteller  AMSCO [ams AG]
Direct Link  http://www.ams.com
Logo AMSCO - ams AG

AS8221-ASSP Datenblatt(HTML) 18 Page - ams AG

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AS8221
Datasheet - Application In form atio n
www.austriamicrosystems.com/flexray/AS8221
Revision 1.7
18 - 42
9 Application Information
System Description. Note that the state diagram does not include all the transitions described in Table 7.
Figure 9. State Diagram
Prefix of “WHILE” is an event and suffix in brackets checks the flags or in case of EN and STBN the input condition. For example: VREC_VBAT
WHILE (EN=0 AND STBN=0).
After the event VBAT supply voltage recovery is detected, the transition is performed if EN and STBN are “low”.
Power Off
Normal
Receive Only
Go to Sleep
Standby
Sleep
EN=0 WHILE (STBN=1)
EN=1 WHILE (STBN=1)
WAK
E
WHIL
E (E
N=1
AND
STB
N=1
) TH
EN
(V
REC_V
CC)
OR
V
REC_V
CC W
HILE
(EN
=1 A
ND
STB
N=1)
UV_VCC
UV_VBAT THEN (RESET_WAKE)
OR
UV_VIO THEN (RESET_WAKE)
From any State (except
Power Off)
EN=0 WHILE (STBN=0)
OR
UV_VCC
EN=1 WHILE (STBN=0)
OR
WAKE WHILE (EN=1 AND STBN=0)
OR
VREC_VCC WHILE (EN=1 AND STBN=0)
Timer = tSLEEP
WA
KE
WH
ILE
(E
N=
0 A
ND
ST
BN
=0
)
OR
VR
EC
_V
BA
T
WH
ILE
(E
N=
0 A
ND
ST
BN
=0
)
OR
VR
EC
_V
IO
WH
ILE
(E
N=
0 A
ND
ST
BN
=0
)
OR
VR
EC
_V
IO
WH
ILE
(U
V_
VC
C)
STBN=1 WHILE (EN=0)
OR
WAKE WHILE (EN=0 AND STBN=1)
OR
VREC_VBAT WHILE (EN=0 AND STBN=1)
OR
VREC_VIO WHILE (EN=0 AND STBN=1)
Input:
EN = 1
STBN = 1
Output:
INH1 = 1
INH2 = 1
Input:
EN = 1
STBN = 0
Output:
INH1 = 1
INH2 = float
Input:
EN = 0
STBN = 1
Output:
INH1 = 1
INH2 = 1
Input:
EN = 0
STBN = 0
Output:
INH1 = 1
INH2 = float
Input:
EN = x
STBN = 0
Output:
INH1 = float
INH2 = float
UV_VBAT WHILE (UV_VCC)
OR
UV_Vcc WHILE (UV_VBAT)
WAKE WHILE (EN=0 AND STBN=0)
OR
UV_VCC WHILE (EN=0 AND STBN=0)
OR
VREC_VCC WHILE (EN=0 AND STBN=0)
OR
WHILE (UV_VCC)
(EN=0 OR EN=1)
OR
(STBN=1 OR STBN=0) WHILE (UV_VBAT OR
UV_VIO)
OR
UV_VBAT OR UV_VIO OR UV_VCC
OR
VREC_VCC
UV_VBAT: Undervoltage event and/or flag for VBAT supply
voltage
UV_VIO: Undervoltage event and/or flag for VIO supply voltage
UV_VCC: Undervoltage event and/or flag for VCC supply voltage
VREC_VBAT: Voltage recovery event and/or flag for VBAT supply
voltage
VREC_VIO: Voltage recovery event and/or flag for VIO supply
voltage
VREC_VCC: Voltage recovery event and/or flag for VCC supply
voltage
WAKE: Wake event and/or flag



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