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參數(shù)資料
型號: ISP1362EE,551
廠商: NXP SEMICONDUCTORS
元件分類: 總線控制器
英文描述: UNIVERSAL SERIAL BUS CONTROLLER, PBGA64
封裝: 6 X 6 MM, 0.80 HEIGHT, PLASTIC, MO-195, SOT-543-1, TFBGA-64
文件頁數(shù): 92/152頁
文件大小: 677K
代理商: ISP1362EE,551
ISP1362_5
NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 05 — 8 May 2007
44 of 152
NXP Semiconductors
ISP1362
Single-chip USB OTG Controller
11.5 Features of the control and bulk transfer (aperiodic transfer)
A paired PTD is a special feature that provides high performance single endpoint bulk
transfer and handles set-up enumeration sequence within 1 ms. A paired PTD
consists of two PTDs serving the same endpoint of a device that are set active and
placed in the ATL RAM at the same time. A paired PTD is specially designed for high
performance of a single endpoint. They are identied by hardware by using the
‘Paired’ bit in the PTD.
Possible to send up to a maximum of 18 USB bulk packets in 1 ms frame
(1.152 MB/s) by using the paired PTD feature.
Provides the status of every transfer endpoints (PTD) by monitoring the
HcATLPTDDoneMap of the ISP1362. This register provides information on which
PTD transfers are complete.
Sets the IRQ after the user-specied number of transfers is done.
Skips any PTD that is wasting bandwidth by using HcATLPTDSkipMap.
B3[3] Last (PTD)
No
This indicates that it is the last PTD of a list. Logic 1 means that this PTD is
the last PTD. The last PTD is used only for ISO. This bit is not used in the
interrupt and ATL transfers. The last PTD is indicated by the HcINTLLastPTD
and HcATLLastPTD registers.
Speed (low)
No
This bit indicates the speed of the endpoint.
0 — full-speed
1 — low-speed
TotalBytes[9:0]
No
This species the total number of bytes to be transferred with this data
structure. This can be greater than MaxPacketSize.
B5[6] Ping-Pong
No
0 — This is the ping buffer of the paired buffer. Paired must be logic 1.
1 — This is the pong buffer of the paired buffer. Paired must be logic 1.
B5[7] Paired
No
If this bit is set to logic 1, two PTDs of the same endpoint and address can be
made active at the same time. This bit is used with the Ping-Pong bit. The rst
paired PTD always starts with Ping = 0. The Pong PTD payload can be sent
out only if the Ping PTD payload is sent out. You can also monitor
RAM_BUFFER _STATUS to see which PTD is currently active on the USB
line.
DirToken[1:0]
No
00 — set up
01 — OUT
10 — IN
11 — reserved
FunctionAddress[6:0]
No
This eld contains the USB address of the function containing the endpoint
that this PTD refers to.
B7[7:5] PollingRate
B7[4:0] StartingFrame
(interrupt only)
No
These two elds together select a start frame number (5 bits) and polls the
interrupt device at a rate specied by PollingRate (3 bits); see Section 11.6.
B7[7:0] StartingFrame
(ISO only)
No
The Host Controller compares this byte with the current frame number (can be
accessed from the HcFmNumber register). The PTD will be processed and
sent out only if the starting frame number equals to the current frame number.
Table 11.
Generic PTD structure: bit description …continued
Name
Status update
by HC
Description
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