AS2702-20(2001) データシートの表示（PDF） - austriamicrosystems AG
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AS2702-20 Datasheet PDF : 18 Pages
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AS-Interface Slave IC
AS2702 (SAP4.1)
The following table specifies the timing parameters relating to fig. 3:
6\PERO
tSTB
tPSTBn
tINP
3DUDPHWHU
Delay PSTBn HL-edge to Px
output data valid
PSTBn strobe width
Input data valid time window
PLQ
PD[
8QLW
1RWH
1.5
µs
6
6.8
µs
1
10.5
12.5
µs
2
Notes:
1
2
Pulse width depends substantially on value of external pull-up resistor
Timing reference is PSTBn HL-edge.
Applies only to parameter port set to 'input' operation
The dc-parameters of the parameter port pins P3, …, P0 are specified as follows:
6\PERO
IOUTLO
IOUTHI
IOUTHI7
IINLO
VSCHLT
VIN
3DUDPHWHU
Sink current @ output L
Leakage current @ output off
Leakage current @ output off;
pull-up current source off
Input current @ VIN = 1V
Input threshold voltage
Acceptable input voltage @
output off
PLQ
10
- 10
-1
-5
2.5
- 0.3
PD[
10
1
- 20
3.5
40
8QLW
1RWH
mA
VOUT = 1V
µA
VOUT = 5V
µA
VOUT = 5V;
IO-conf. = 7
µA
1
V
2
V
Notes:
1
2
The passive high-side current-source provides an about constant input current @
0V <= VIN <= 4V
No hysteresis implemented
Though equipped for bidirectional data transfer as D3, …, D0, the parameter port is never-
theless less flexible than the data port.
Note the following differences:
ik) The parameter port is set portwise, the data port bitwise by the IO-configuration code;
il) The parameter port can only be set to either ‘output’ or ‘input’. A bidirectional behaviour
within a strobe cycle is not possible;
im) The parameter port is set to ‘output’ as a rule; the only exception occurs in case of IO-
configuration 7 and a master data request, which set it to ‘input’.
To govern the data transfer at the parameter port P3, …, P0 strobe pin PSTBn is equipped
with a low-side open-drain output switch plus a passive high-side current source with a nom.
10 µA pull-up current capability. Typically the PSTBn-strobe width is about 6 µs, see fig. 3.
( However to simplify and shorten the component test time of the slave device, the PSTBn pin
is also used as an input. Input low pulses of more than 50 µs each will step and cycle the de-
vice through 3 different testmodes beyond the regular operation as described in this da-
tasheet.)
Rev. C, January 2001
Page 11 of 18
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