AS2701 데이터 시트보기 (PDF) - austriamicrosystems AG
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AS2701 Datasheet PDF : 16 Pages
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AS-Interface Slave IC
AS2701A (ISA3+)
For successful programming the programmer hardware must have sink/source capability of at
least 5 mA, and the AS-Interface Slave IC's supply voltage LTGP has to be in the range of
26.65 V ...33.35 V.
The only E2PROM address locations which can be programmed through the AS-Interface
Slave IC (hence over the AS-Interface Bus and by the AS-Interface Master), are locations 0
and 1, which both have been reserved for the AS-Interface Slave unit's address.
The E2PROM has to be programmed in the following way:
E2PROM D7
Address
0
0
1
0
2
3
D6 D5
0
0
0
0
ID Code
ID Code
D4 D3 D2 D1 D0
AS-Interface address
AS-Interface address
IO Configuration
IO Configuration
Initialization Data
0
0
Custom Specific Data
Custom Specific Data
Recommended E2PROM types:
Supplier
Philips
ST
Catalyst
Xicor
Catalyst
Xicor
Type
PCA8581P
ST24C01
CAT24LC02(Z)IP
X24LC02PI
CAT24LC04(Z)IP
X24(L)C04PI
Organization
128 x 8
128 x 8
256 x 8
256 x 8
512 x 8
512 x 8
f) Sensor / actuator supply pin UOUT / Functional and electrical
characteristics
Symbol
VUOUT
VUOUTp
tUOUTP
VDROP
IUOUT
CUOUT
Parameter
Output Voltage at UOUT
Overswing of the Output
Voltage
Overswing Impulse Width
Voltage Drop from LTGP
to UOUT
Output Current UOUT
Load Capacity UOUT
min
VLTGP –
VDROP min
5.5
0
10
max
VLTGP –
VDROPmin
1.5
2.
6.7
35
470
Unit
V
V
ms
V
mA
µF
Note
IUOUT = 35 mA
CUOUT = 10 µF:
Switching 0-35 mA - 0
11.0 V < VUOUT < 27.6 V
The interface is intended for the supply voltage to actuators, sensors as well as external
circuits with a power supply of <35mA without overloading the AS-Interface line in the range of
the signal frequency. The AS-Interface slave IC has an internal circuit protector which limits the
current during the charging of the load capacitor and which effects a power down at thermal
overload, e.g. at too high output currents.
In the case of a current break down on the AS-Interface line of less than 1ms, the internally
stored information is retained. The supply voltage of the IC during this time is extracted from
the capacitor Pin UOUT which is disconnected from the AS-Interface line.
Rev. C, October 2000
Page 11 of 16
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