
Hardware Description
3-6 AT43DK380 USB Host/Function Dev. Kit User Guide
3485A–USB–7/04
The AT43DK380 Main Development Platform supports various addressing schemes to
the AT43USB380. Depending on the system processor used, JP5 can be configured to
match the address requirements of the system processor and that of the AT43USB380.
AT43USB380's addressing scheme is on the byte boundary. For most processors with
byte boundary addressing, the default setting is used. For some processors with internal
hardware address shifting to word or long word boundary, either use software to shift
the address back to byte boundary, or use JP5 for hardware shifting scheme. Do not
use both software and hardware shifting. Table 3-5 shows the jumper settings for byte,
word, and long word addressing schemes.
For an 8/16-bit mode interface, the AT43USB380's upper 16 data bits can be configured
through software to be high, low, or floating. For 32-bit mode, the upper 16 data bits are
connected to the system. The AT43DK380 Main Development Platform's JP2 and JP3
can be used to connect the upper 16 bits to the system or left floating to match the bus
width requirements of the system processor. Table x-x shows the jumper settings for dif-
ferent bus width interfaces.
The AT43DK380 Main Development Platform supports two modes of operation, the
default Flash (or Standalone) Mode and the ICE (In-circuit Emulator) mode. In Flash
Mode, the AT43DK380 Main Development Platform executes code from its on-board
flash ROM. While in ICE Mode, a In-Circuit Emulator for the system processor can be
connected through the JTAG connector of the Processor Daughter Card (PDC) to fur-
ther facilitate code development. For the jumper settings for the different modes, please
refer to the corresponding PDC section.
Table 3-5. AT43USB380 Address Configuration
Default: Byte
Addressing Word Addressing Long Word Addressing
JP5
Close: 2-4, 3-5, 6-8, 7-
9,10-12, 11-13, 14-16,
15-17
Close: 3-4, 5-6, 7-8, 9-
10,11-12, 13-14, 15-16,
17-18
Close: 4-6, 5-7, 8-10, 9-
11, 12-14, 13-15, 16-18,
17-19
Table 3-6. AT43USB380 D[31:16] Configuration
Default: 8/16
Bit Interface 32 Bit Interface
JP2 Open: all Close: 1-2, 3-4, 5-6, 7-8, 9-10, 11-12, 13-14, 15-16, 17-18, 19-20
JP3 Open: all Close: 1-2, 3-4, 5-6, 7-8, 9-10, 11-12, 13-14, 15-16, 17-18, 19-20