參數(shù)資料
型號: ISP1583BS
廠商: NXP SEMICONDUCTORS
元件分類: 總線控制器
英文描述: Hi-Speed Universal Serial Bus peripheral controller
中文描述: UNIVERSAL SERIAL BUS CONTROLLER, PQCC64
封裝: 9 X 9 MM, 0.85 MM HEIGHT, LEAD FREE, PLASTIC, MO-220, SOT-804-1, HVQFN-64
文件頁數(shù): 41/87頁
文件大?。?/td> 420K
代理商: ISP1583BS
Philips Semiconductors
ISP1583
Hi-Speed USB peripheral controller
Product data
Rev. 03 — 12 July 2004
41 of 87
9397 750 13461
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
9.3.6
Endpoint MaxPacketSize register (address: 04h)
This register determines the maximum packet size for all endpoints except control 0.
The register contains 2 bytes, and the bit allocation is given in
Table 42
.
Each time the register is written, the Buffer Length registers of all endpoints are
reinitialized to the FFOSZ field value. Bits NTRANS control the number of
transactions allowed in a single microframe (for high-speed isochronous and interrupt
endpoints only).
Table 42:
Bit
Symbol
Reset
Bus reset
Access
Bit
Symbol
Reset
Bus reset
Access
Endpoint MaxPacketSize register: bit allocation
15
14
reserved
-
-
-
-
R/W
R/W
7
6
13
12
11
10
9
8
NTRANS[1:0]
0
0
R/W
4
FFOSZ[7:0]
0
0
R/W
FFOSZ[10:8]
0
0
R/W
1
-
-
0
0
0
0
0
0
R/W
5
R/W
3
R/W
2
R/W
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Table 43:
Bit
15 to 13
12 to 11
Endpoint MaxPacketSize register: bit description
Symbol
Description
-
reserved
NTRANS[1:0]
Number of Transactions
(HS mode only).
00 —
1 packet per microframe
01 —
2 packets per microframe
10 —
3 packets per microframe
11 —
reserved.
These bits are applicable only for isochronous or interrupt
transactions.
FIFO Size
: Sets the FIFO size, in bytes, for the indexed endpoint.
Applies to both high-speed and full-speed operations (see
Table 44
).
10 to 0
FFOSZ[10:0]
Table 44:
NTRANS[1:0]
0h
0h
0h
0h
0h
0h
0h
2h
Programmable FIFO size
FFOSZ[10:0]
08h
10h
20h
40h
80h
100h
200h
400h
Non-isochronous
8 bytes
16 bytes
32 bytes
64 bytes
128 bytes
256 bytes
512 bytes
-
Isochronous
-
-
-
-
-
-
-
3072 bytes
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