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AC75 Hardware Interface Description
Strictly confidential / Preliminary
Function
Signal name
GPIO8
GPIO9
GPIO10
Digital Audio
DAI0
interface
DAI1
DAI2
DAI3
DAI4
DAI5
DAI6
Analog
VMIC
Audio
interface
EPP2
EPN2
EPP1
EPN1
MICP1
MICN1
MICP2
MICN2
AGND
AC75_HD_V00.202
IO Signal form and level
I/O
Pulse counter:
I/O
pulse
~
~~~~~~~~~~~~~
I/O
|________|
| ≥ 450µs | ≥ 450µs |
Slew rate ≤ 1µs
Pulse rate: max. 1000 pulses per second
O
V
max = 0.2V at I = 2mA
OL
V
min = 2.55V at I = -0.5mA
I
OH
V
max = 3.05V
OH
O
O
V
max = 0.8V
IL
V
min = 2.15V
I
IH
V
max = VEXTmin + 0.3V = 3.05V
I
IH
I
O
V
min = 2.4V
O
V
typ = 2.5V
O
V
max = 2.6V
O
I
= 2mA
max
O
3.0Vpp differential typical @ 0dBm0
4.2Vpp differential maximal @ 3.14dBm0
O
Measurement conditions:
Audio mode: 6
Outstep 3
No load
Minimum differential resp. single ended
load 27Ohms
O
4.2Vpp (differential) typical @ 0dBm0
6.0Vpp differential maximal @ 3.14dBm0
O
Measurement conditions:
Audio mode: 5
Outstep 4
No load
Minimum differential resp. single ended
load 7.5Ohms
I
Full Scale Input Voltage
0dBm0 Input Voltage
I
At MICN1, apply external bias from 1.0V to
1.6V.
Measurement conditions:
Audio mode: 5
I
Full Scale Input Voltage
0dBm0 Input Voltage
I
At MICN2, apply external bias from 1.0V to
1.6V.
Measurement conditions:
Audio mode: 6
Analog Ground
Page 92 of 120
Comment
Alternatively, the GPIO10 pin
can be configured as a pulse
counter for pulse rates from 0
~~~
|________|
to 1000 pulses per second.
See Table 16 for details.
If unused keep pins open.
Microphone supply for
customer feeding circuits
The audio output can directly
operate a 32-Ohm-
loudspeaker.
If unused keep pins open.
The audio output can directly
operate an 8-Ohm-
loudspeaker.
If unused keep pins open.
1.6Vpp
Balanced or single ended
microphone or line input with
1.1Vpp
external feeding circuit (using
VMIC and AGND).
If unused keep pins open.
1.6Vpp
Balanced or single ended
microphone or line input with
1.1Vpp
external feeding circuit (using
VMIC and AGND).
If unused keep pins open.
GND level for external audio
circuits
s
27.04.2006
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