AS8201 View Datasheet(PDF) - austriamicrosystems AG
Part Name
Description
Manufacturer
AS8201 Datasheet PDF : 13 Pages
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TTP/C-C1 Communications Controller Data Sheet
AS8201
Austria Mikro Systeme International AG
Integrated Power-On Reset
An internal Power-On Reset generator is integrated. When The supply voltage ramps up, the
internal reset signal is kept active (low) for about 24 us typical. To activate this function the
RESETB must be left unconnected.
Parameter
supply voltage slope
power on reset active time after VDD >
1,2V
external reset low to internal high
external reset high to internal low
Symbol
dV/dt
tpon_res
tres_fall
treset_rise
Min
250
16
81
130
Typ Max
-
-
24
34
118 173
129 104
Unit
kV/s
us
ns
ns
Oscillator circuitry
The internal oscillator cell requires an external quartz or an external oscillator respectively
(Figure 5, Figure 6). The internal controller clock is available at the port MICROTICK (inverted
to clock signal applied at XOUT0).
20Mhz
VSS
16Mhz
VSS
20Mhz
VSS
OSC
16Mhz
VSS
OSC
XENA0 XIN0
XOUT0
XENA1 XIN1
TTA-C1
XOUT1
Figure 5: Quartz Circuit
XXEENNAA00 XXOINUT00 XXOINU0T0
XXEENNAA11 XXOINU1T1
TTA-C1
XXOINU1T1
Figure 6: Oscillator Circuit
TTP/C Bus Interface
Pin Name
CTS
OE
TXD
RXD
BDE
mode
out
in
out
in
out
width
2
2
2
2
2
comment
transmitter clear to send
transmitter output enable
transmit data
receiver input
bus driver enable
Table 5: TTP/C Bus Interface Ports
The controller can be connected to transceivers with recessive state and to transceivers with
three-state outputs, respectively. For safe operation of the device the bus driver enable signal
BDE must be connected with output enable OE. To deactivate the bus guardian the OE signal
has to be tied to VCC. Applications with recessive state transceivers do not use the CTS
signal.
Rev. NC, October 1999
Page 10 of 13
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