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參數(shù)資料
| 型號(hào)： | W83627HF-PW |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 外設(shè)及接口 |
| 英文描述： | WINBOND I/O |
| 中文描述： | MULTIFUNCTION PERIPHERAL, PQFP128 |
| 封裝： | PLASTIC, QFP-128 |
| 文件頁(yè)數(shù)： | 76/185頁(yè) |
| 文件大小： | 1044K |
| 代理商： | W83627HF-PW |
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W83627HF/F
PRELIMINARY
Publication Release Date: Sep 1998
Revision 0.50
- 66 -
EPP Data Port 2 (R/W)
PD7
PD6
PD
5
PD4
PD3
PD2
PD1
PD0
EPP Data Port 3 (R/W)
PD7
PD6
PD
5
PD4
PD3
PD2
PD1
PD0
6.2.7 EPP Pin Descriptions
EPP NAME
nWrite
PD<0:7>
Intr
nWait
TYPE
O
I/O
I
I
EPP DESCRIPTION
Denotes an address or data read or write operation.
Bi-directional EPP address and data bus.
Used by peripheral device to interrupt the host.
Inactive to acknowledge that data transfer is completed. Active to indicate
that the device is ready for the next transfer.
Paper end; same as SPP mode.
Printer selected status; same as SPP mode.
This signal is active low. It denotes a data read or write operation.
Error; same as SPP mode.
This signal is active low. When it is active, the EPP device is reset to its
initial operating mode.
This signal is active low. It denotes an address read or write operation.
PE
Select
nDStrb
nError
nInits
I
I
O
I
O
nAStrb
O
6.2.8 EPP Operation
When the EPP mode is selected in the configuration register, the standard and bi-directional modes are
also available. The PDx bus is in the standard or bi-directional mode when no EPP read, write, or
address cycle is currently being executed. In this condition all output signals are set by the SPP Control
Port and the direction is controlled by DIR of the Control Port.
A watchdog timer is required to prevent system lockup. The timer indicates that more than 10
μ
S have
elapsed from the start
of the EPP
cycle to the time
WAIT#
is deasserted. The current EPP cycle is
aborted when a time-out occurs. The time-out condition is indicated in Status bit 0.
6.2.8.1 EPP Operation
The EPP operates on a two-phase cycle. First, the host selects the register within the device for
subsequent operations. Second, the host performs a series of read and/or write byte operations to the
selected register. Four operations are supported on the EPP: Address Write, Data Write, Address Read,
and Data Read. All operations on the EPP device are performed asynchronously.
6.2.8.2 EPP Version 1.9 Operation
The EPP read/write operation can be completed under the following conditions:
a. If the nWait is active low, when the read cycle (nWrite inactive high, nDStrb/nAStrb active low) or write
cycle (nWrite active low, nDStrb/nAStrb active low) starts, the read/write cycle proceeds normally and
will be completed when nWait goes inactive high.
b. If nWait is inactive high, the read/write cycle will not start. It must wait until nWait changes to active
low, at which time it will start as described above.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| W83627HF | WINBOND I/O |
| W83629D | A Condensed Centralizer IC For IRQ and DMA Control.(用于中斷請(qǐng)求和直接存儲(chǔ)器存儲(chǔ)控制的中心器) |
| W83628F | PCI TO ISA BRIDGE SET |
| W83637HF | LPC I/O |
| W83637HF-AW | LPC I/O |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| W83627HG | 制造商:WINBOND 制造商全稱:Winbond 功能描述:Winbond LPC I/O |
| W83627HG-AW | 功能描述:IC LPC SUPER I/O 128-PQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 專用 系列:- 標(biāo)準(zhǔn)包裝:3,000 系列:- 應(yīng)用:PDA，便攜式音頻/視頻，智能電話 接口:I²C，2 線串口 電源電壓:1.65 V ~ 3.6 V 封裝/外殼:24-WQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:24-QFN 裸露焊盤（4x4） 包裝:帶卷 (TR) 安裝類型:表面貼裝 產(chǎn)品目錄頁(yè)面:1015 (CN2011-ZH PDF) 其它名稱:296-25223-2 |
| W83627SF | 制造商:WINBOND 制造商全稱:Winbond 功能描述:WINBOND I/O |
| W83627SF_05 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:WINBOND I/O |
| W83627SF-AW | 制造商:WINBOND 制造商全稱:Winbond 功能描述:WINBOND I/O |
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