User's Manual

AC65/AC75 Hardware Interface Description
Confidential / Preliminary
s
AC65/AC75_hd_v00.372 Page 91 of 118 2006-08-03
Function Signal name IO Signal form and level Comment
I2CCLK _SPICLK O V
OL
max = 0.2V at I = 2mA
V
OH
min = 2.55V at I = -0.5mA
V
OH
max = 3.05V
I
2
C interface is only available
if the two pins are not used as
SPI interface.
I
2
C interface
I2CDAT_SPIDO I/O V
OL
max = 0.2V at I = 2mA
V
IL
max = 0.8V
V
IH
min = 2.15V
V
IH
max = VEXTmin + 0.3V = 3.05V
I2CDAT is configured as
Open Drain and needs a pull-
up resistor in the host
application.
According to the I
2C Bus
Specification Version 2.1 for
the fast mode a rise time of
max. 300ns is permitted.
There is also a maximum
VOL=0.4V at 3mA specified.
The value of the pull-up
depends on the capacitive
load of the whole system (I2C
Slave + lines). The maximum
sink current of I2CDAT and
I2CCLK is 4mA.
If lines are unused keep pins
open.
VUSB_IN I V
IN
min = 4.0V
V
IN
max = 5.25V
USB_DN I/O
USB
USB_DP I/O
Differential Output Crossover voltage
Range
V
CRS
min = 1.5V, V
CRS
max = 2.0V
Line to GND:
V
OH
max = 3.6V
V
OH
typ = 3.2V
V
OH
min = 3.0V at I=-0.5mA
V
OL
max = 0.2V at I=2mA
V
IH
min = 2.24V
V
IL
max = 0.96V
Driver Output Resistance
Z
typ
= 32Ohm
Pullup at USB_DP R
typ
=1.5kOhm
All electrical characteristics
according to USB
Implementers’ Forum, USB
2.0 Full Speed Specification.
Without Java: USB port
Under Java: Debug interface
for development purposes.
If lines are unused keep pins
open.
GPIO1 I/O
GPIO2 I/O
GPIO3 I/O
GPIO4 I/O
GPIO5 I/O
GPIO6 I/O
GPIO7 I/O
GPIO8 I/O
GPIO9 I/O
General
Purpose
Input/Output
GPIO10 I/O
V
OL
max = 0.2V at I = 2mA
V
OH
min = 2.55V at I = -0.5mA
V
OH
max = 3.05V
V
IL
max = 0.8V
V
IH
min = 2.15V,
V
IH
max = VEXTmin + 0.3V = 3.05V
Pulse counter:
pulse
~
|________|
~~~~~~~~~~~~~
|________|
~~~
|  450µs |  450µs |
Slew rate  1µs
Pulse rate: max. 1000 pulses per second
All pins which are configured
as input must be connected to
a pull-up or pull-down resistor.
If lines are unused (not
configured) keep pins open.
Alternatively, the GPIO10 pin
can be configured as a pulse
counter for pulse rates from 0
to 1000 pulses per second.