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參數(shù)資料
| 型號(hào)： | PDUSBD12PWDH |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 總線控制器 |
| 英文描述： | nullUSB interface device with parallel bus |
| 中文描述： | UNIVERSAL SERIAL BUS CONTROLLER, PDSO28 |
| 文件頁數(shù)： | 15/35頁 |
| 文件大?。?/td> | 838K |
| 代理商： | PDUSBD12PWDH |
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Philips Semiconductors
PDIUSBD12
USB interface device with parallel bus
Product data
Rev. 08 — 20 December 2001
15 of 35
9397 750 09238
Koninklijke Philips Electronics N.V. 2001. All rights reserved.
11.3 Data flow commands
Data flow commands are used to manage the data transmission between the USB
endpoints and the external microcontroller. Much of the data flow is initiated via an
interrupt to the microcontroller. The microcontroller utilizes these commands to
access and determine whether the endpoint FIFOs have valid data.
11.3.1
Read interrupt register
Code (Hex) —
F4
Transaction —
read 2 bytes
Table 7:
Bit
7
Set DMA command: bit allocation
Symbol
ENDPOINT INDEX 5
INTERRUPT ENABLE
Description
A ‘1’ allows for an interrupt to be generated whenever
the endpoint buffer is validated (see
Section 11.3.8
“Validate buffer”
command). Normally turned off for
DMA operation to reduce unnecessary CPU servicing.
A ‘1’ allows for an interrupt to be generated whenever
the endpoint buffer contains a valid packet. Normally
turned off for DMA operation to reduce unnecessary
CPU servicing.
A ‘0’ signifies a normal interrupt pin mode where an
interrupt is generated as a logical OR of all the bits in
the interrupt registers. A ‘1’ signifies that the interrupt
will occur when Start of Frame clock (SOF) is seen on
the upstream USB bus. The other normal interrupts are
still active.
When this bit is set to ‘1’, the DMA operation will
automatically restart.
This bit determines the direction of data flow during a
DMA transfer. A ‘1’ means external shared memory to
PDIUSBD12 (DMA Write); a ‘0’ means PDIUSBD12 to
the external shared memory (DMA Read).
Writing a ‘1’ to this bit will start DMA operation through
the assertion of pin DMREQ. The main endpoint buffer
needs to be full (for DMA Read) or empty (for DMA
Write) before DMREQ will be asserted. In a single
cycle DMA mode, the DMREQ is deactivated upon
receiving DMACK_N. In burst mode DMA, the DMREQ
is deactivated after the number of burst is exhausted.
It is then asserted again for the next burst. This process
continues until EOT_N is asserted together with
DMACK_N and either RD_N or WR_N, which will reset
this bit to ‘0’ and terminate the DMA operation. The
DMA operation can also be terminated by writing a
‘0’ to this bit.
Selects the burst length for DMA operation:
00 Single-cycle DMA
01 Burst (4-cycle) DMA
10 Burst (8-cycle) DMA
11 Burst (16-cycle) DMA
6
ENDPOINT INDEX 4
INTERRUPT ENABLE
5
INTERRUPT PIN
MODE
4
AUTO RELOAD
3
DMA DIRECTION
2
DMA ENABLE
1 to 0
DMA BURST
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| PDIUSBD12D | nullUSB interface device with parallel bus |
| PDIUSBD12PW | nullUSB interface device with parallel bus |
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| PDIUSBH11ANB | Universal Serial Bus Hub |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| PDUSBP11APWDH | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Serial Bus Transceiver |
| PDUSIDEBRKT | 制造商:Tripp Lite 功能描述:RACK ENCLOSURE VERTICAL INSTALLATION KIT PDU, SURGE, POWER S - Bulk 制造商:Tripp Lite 功能描述:KIT PDU, SURGE, POWER STRIP 制造商:Tripp Lite 功能描述:Tripp Lite Rack Enclosure Vertical Installation Kit PDU, Surge, Power Strip |
| PDU-V101 | 功能描述:PHOTODIODE UV 0.31MM SQ TO-46 RoHS:否 類別:傳感器，轉(zhuǎn)換器 >> 光學(xué) - 光電檢測(cè)器 - 光電二極管 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 波長(zhǎng):850nm 顏色 - 增強(qiáng)型:- 光譜范圍:400nm ~ 1100nm 二極管類型:引腳 nm 下響應(yīng)率:0.62 A/W @ 850nm 響應(yīng)時(shí)間:5ns 電壓 - (Vr)（最大）:50V 電流 - 暗（標(biāo)準(zhǔn)）:1nA 有效面積:1mm² 視角:150° 工作溫度:-40°C ~ 100°C 封裝/外殼:徑向，5mm 直徑（T 1 3/4） 其它名稱:475-2649-6 |
| PDU-V101Q | 功能描述:PHOTODIODE UV W/QW.31MM SQ TO-46 RoHS:否 類別:傳感器，轉(zhuǎn)換器 >> 光學(xué) - 光電檢測(cè)器 - 光電二極管 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 波長(zhǎng):850nm 顏色 - 增強(qiáng)型:- 光譜范圍:400nm ~ 1100nm 二極管類型:引腳 nm 下響應(yīng)率:0.62 A/W @ 850nm 響應(yīng)時(shí)間:5ns 電壓 - (Vr)（最大）:50V 電流 - 暗（標(biāo)準(zhǔn)）:1nA 有效面積:1mm² 視角:150° 工作溫度:-40°C ~ 100°C 封裝/外殼:徑向，5mm 直徑（T 1 3/4） 其它名稱:475-2649-6 |
| PDU-V102 | 功能描述:PHOTODIODE UV 0.87MM SQ TO-46 RoHS:否 類別:傳感器，轉(zhuǎn)換器 >> 光學(xué) - 光電檢測(cè)器 - 光電二極管 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 波長(zhǎng):850nm 顏色 - 增強(qiáng)型:- 光譜范圍:400nm ~ 1100nm 二極管類型:引腳 nm 下響應(yīng)率:0.62 A/W @ 850nm 響應(yīng)時(shí)間:5ns 電壓 - (Vr)（最大）:50V 電流 - 暗（標(biāo)準(zhǔn)）:1nA 有效面積:1mm² 視角:150° 工作溫度:-40°C ~ 100°C 封裝/外殼:徑向，5mm 直徑（T 1 3/4） 其它名稱:475-2649-6 |
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