Eurotech PXA320, Руководство пользователя

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System Specification
110120-1000A
51
ADSmartIO
The ADSmartIO is an Atmel ATmega8535 microcontroller on the GCM designed to
handle I/O functions autonomously. The ADSmartIO signals are available on header J11 ,
page 35 . For a description of these I/O capabilities, see ADSmartIO , page 22 .
Absolute Maximum Ratings
Input voltage, any pin 3.8 V
Symbol Parameter Min Typ. Max Units
V
CC
ADSmartIO supply voltage 3.3 V
R
S
Series resistance (note 21) 100 Ω
Digital I/O (note 22)
V
IH
High-level input voltage 0.6V
CC
V
V
IL
Low-level input voltage 0.2V
CC
V
V
OH
High-level output voltage
I
OH
= -10 mA, V
CC
= 3.0 V
2.2 V
V
OL
Low-level output voltage
I
OL
= 10 mA, V
CC
= 3.0 V
0.5 V
R
PU
Software-selectable pull-ups to 3.3 V
(note 23)
20 50 k Ω
A/D Inputs (note 22)
n Resolution (note 24) 10 bit
R
IN
Analog input resistance 100 MΩ
V
REF
A/D reference voltage 2.5 V
V
IN
A/D input voltage range 0 V
REF
V
Notes:
21. Row I/O, column I/O, UCIO 0-2, RX, and TX have series resistance limiting the dc
current that any one pin can source or sink.
22. Specifications are taken from the Atmel ATmega8535 Product Datasheet, 2502K-AVR-
10/06.
23. Control pull-up resistors by writing to bits of IO port when the port is configured as a
digital input (bit mask 1=enable, 0=disable).
24. Digital noise on the board may degrade analog performance under some conditions.