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參數資料
| 型號： | ISP1181 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Full-speed Universal Serial Bus Interface Device(全速通用串行總線接口器件) |
| 中文描述： | 全速通用串行總線接口設備（全速通用串行總線接口器件） |
| 文件頁數： | 11/69頁 |
| 文件大小： | 1655K |
| 代理商： | ISP1181 |
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Philips Semiconductors
ISP1181
Full-speed USB interface
Objective specification
Rev. 01 — 13 March 2000
11 of 69
9397 750 06896
Philips Electronics N.V. 2000. All rights reserved.
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 Configuration 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
undefined
.
Each programmable FIFO can be configured independently via its ECR, but the total
physical size of all enabled endpoints (IN plus OUT) must not exceed 2462 bytes
(512 bytes for non-isochronous FIFOs).
Table 6
shows an example of a configuration fitting in the maximum available space of
2462 bytes. The total number of logical bytes in the example is 1311. The physical
storage capacity used for double buffering is managed by the device hardware and is
transparent to the user.
Table 5:
FFOSZ[3:0]
0000
0001
0010
0011
0100
0101
0110
0111
1000
Programmable FIFO size
Non-isochronous
8 bytes
16 bytes
32 bytes
64 bytes
reserved
reserved
reserved
reserved
interrupt IN 8 bytes,
rate feedback mode
interrupt IN 16 bytes,
rate feedback mode
interrupt IN 32 bytes,
rate feedback mode
interrupt IN 64 bytes,
rate feedback mode
reserved
reserved
reserved
reserved
Isochronous
16 bytes
32 bytes
48 bytes
64 bytes
96 bytes
128 bytes
160 bytes
192 bytes
256 bytes
1001
320 bytes
1010
384 bytes
1011
512 bytes
1100
1101
1110
1111
640 bytes
768 bytes
896 bytes
1023 bytes
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| ISP1181DGG | INDUCTOR 4.7NH +-.3NH 0402 SMD |
| ISP1183 | Low-power Universal Serial Bus interface device with DMA |
| ISP1183BS | Low-power Universal Serial Bus interface device with DMA |
| ISP1301 | Universal Serial Bus On-The-Go transceiver |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| ISP1181A | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Full-speed Universal Serial Bus peripheral controller |
| ISP1181ABS | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Full-speed Universal Serial Bus peripheral controller |
| ISP1181ABS,518 | 功能描述:USB 接口集成電路 USB 1.1 ADV DEVICE RoHS:否 制造商:Cypress Semiconductor 產品:USB 2.0 數據速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
| ISP1181ABS,551 | 功能描述:USB 接口集成電路 USB 1.1 ADVANCED DEVICE RoHS:否 制造商:Cypress Semiconductor 產品:USB 2.0 數據速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
| ISP1181ABS,557 | 功能描述:USB 接口集成電路 DO NOT USE ORDER -S OR -T PART RoHS:否 制造商:Cypress Semiconductor 產品:USB 2.0 數據速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
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