參數(shù)資料
型號: ISP1181BDGG,112
廠商: NXP SEMICONDUCTORS
元件分類: 總線控制器
英文描述: UNIVERSAL SERIAL BUS CONTROLLER, PDSO48
封裝: 6.10 MM, PLASTIC, MO-153, SOT-362-1, TSSOP-48
文件頁數(shù): 4/70頁
文件大?。?/td> 341K
代理商: ISP1181BDGG,112
Philips Semiconductors
ISP1181B
Full-speed USB peripheral controller
Product data
Rev. 02 — 07 December 2004
12 of 70
9397 750 13958
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
[1]
The total amount of FIFO storage allocated to enabled endpoints must not exceed 2462 bytes.
[2]
IN: input for the USB host (ISP1181B transmits); OUT: output from the USB host (ISP1181B receives). The data ow direction is
determined by bit EPDIR in the Endpoint Conguration Register.
9.2 Endpoint FIFO size
The size of the FIFO determines the maximum packet size that the hardware can
support for a given endpoint. Only enabled endpoints are allocated space in the
shared FIFO storage, disabled endpoints have zero bytes. Table 5 lists the
programmable FIFO sizes.
The following bits in the Endpoint Conguration Register (ECR) affect FIFO
allocation:
Endpoint enable bit (FIFOEN)
Size bits of an enabled endpoint (FFOSZ[3:0])
Isochronous bit of an enabled endpoint (FFOISO).
Remark: Register changes that affect the allocation of the shared FIFO storage
among endpoints must not be made while valid data is present in any FIFO of the
enabled endpoints. Such changes will render all FIFO contents undened.
Table 4:
Endpoint access and programmability
Endpoint
identier
FIFO size (bytes)[1]
Double
buffering
I/O mode
access
DMA mode
access
Endpoint type
0
64 (xed)
no
yes
no
control OUT[2]
0
64 (xed)
no
yes
no
control IN[2]
1
programmable
supported
programmable
2
programmable
supported
programmable
3
programmable
supported
programmable
4
programmable
supported
programmable
5
programmable
supported
programmable
6
programmable
supported
programmable
7
programmable
supported
programmable
8
programmable
supported
programmable
9
programmable
supported
programmable
10
programmable
supported
programmable
11
programmable
supported
programmable
12
programmable
supported
programmable
13
programmable
supported
programmable
14
programmable
supported
programmable
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