Atmel AT43DK325, Руководство пользователя

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Hardware Description
3-2 AT43DK325 USB Controller Dev. Kit User Guide
3430B–USB–3/04
and 5 with jumpers. On keyboard applications, LEDs can be used to identify Scroll,
Caps, and Num.
3.3 DB25 Female
Parallel Port
Connector J6
This parallel port connector is used to download the firmware from the PC to the
SEEPROM in socket U4. Further explanations on setting up the board for downloading
the firmware to the SEEPROM is available in “USB Wizard: Application Examples and
Demos” for the AT43USB325 and Demos documentation.
3.4 8-pin IC Socket
U4
The SEEPROM device is plugged into this 8-pin socket. This board is supplied with an
Atmel SEEPROM.
3.5 Programmable
Logic Device U6
This Development Board uses an ATF16V8CZ Electrical Erasable PLD (EE PLD). This
device controls the data flow to and from the SEEPROM during firmware downloading
and during the booting process upon power-up or reset.
3.6 4x2 Header
General Purpose
I/O PORT A/JP1
This header provides external access to PORT A of the AT43USB325. Each pin header,
labelled “0” - “7”, corresponds to the PORT A pin of the same number.
3.7 4x2 Header
General Purpose
I/O PORT B/JP2
This header provides external access to PORT B of the AT43USB325. Each pin header,
labelled “0” - “7”, corresponds to the PORT B pin of the same number.
3.8 4x2 Header
General Purpose
I/O PORT C/JP3
This header provides external access to PORT C of the AT43USB325. Each pin header,
labelled “0” - “7”, corresponds to the PORT C pin of the same number.
3.9 4x2 Header
General Purpose
I/O PORT D/JP4
This header provides external access to PORT D of the AT43USB325. Each pin header,
labelled “0” - “7”, corresponds to the PORT D pin of the same number.
3.10 4x2 Header
General Purpose
I/O PORT E/JP5
This header provides external access to PORT E of the AT43USB325. Each pin header,
labelled “0” - “7”, corresponds to the PORT E pin of the same number.
3.11 2x2 Header
General Purpose
I/O JP6
External access to PORT F is available at this header. In the 43USB325E, Port F only
has 4 pins marked as PF0 to PF3. These pins are used to download firmware from the
SEEPROM to the internal SRAM upon reset or power-up. Once firmware is down-
loaded, PF0 will remain high while PF1-PF3 will be available as general purpose I/Os.