ISP1362
Single-chip USB OTG controller
Philips Semiconductors
0x0000
ISTL0 area (512 bytes)
0x03FF
0x0400
ISTL1 area (512 bytes)
INTL area (512 bytes)
0x07FF
0x0800
0x09FF
0x0A00
ATL area (1536 bytes)
0x0FFF
004aaa053
Fig 4. Recommended values of the ISP1362 buffer memory allocation.
The INTL and ATL buffers use ‘blocked memory management’ scheme to enhance
the status and control capability of each and every individual PTD structure. The INTL
and ATL buffers are further divided into blocks of equal sizes depending on the value
written to the HcATLBlkSize register (ATL) and the HcINTLBlkSize register (INTL).
The ISP1362 HC supports up to 32 blocks in the ATL and INTL buffers. Each of these
blocks can be used for one complete Philips Transfer Descriptor (PTD) data.
Note that the block size does not include the 8-byte PTD header and is strictly the
size of the payload. Both the ATL and INTL block sizes must be a multiple of DWord
(4 bytes).
9397 750 12337
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Product data
Rev. 03 — 06 January 2004
16 of 150
NXP [ NXP ]
