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參數(shù)資料
型號(hào): W83627F
廠商: WINBOND ELECTRONICS CORP
英文描述: WINBOND I/O
中文描述: 華邦的I / O
文件頁(yè)數(shù): 95/185頁(yè)
文件大小: 1044K
代理商: W83627F
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W83627HF/F
PRELIMINARY
Publication Release Date: Sep 1998
Revision 0.50
- 85 -
9. PLUG AND PLAY CONFIGURATION
The W83627HF uses Compatible PNP protocol to access configuration registers for setting up different
types of configurations. In W83627HF, there are eleven Logical Devices (from Logical Device 0 to
Logical Device B with the exception of logical device 4 for backward compatibility) which correspond to
eleven individual functions: FDC (logical device 0), PRT (logical device 1), UART1 (logical device 2),
UART2 (logical device 3), KBC (logical device 5), CIR (Consumer IR, logical device 6), GPIO1 (logical
device 7), GPIO2 (logical device 8), GPIO3 (logical device 9), ACPI ((logical device A), and hardware
monitor (logical device B). Each Logical Device has its own configuration registers (above CR30). Host
can access those registers by writing an appropriate logical device number into logical device select
register at CR7.
9.1 Compatible PnP
9.1.1 Extended Function Registers
In Compatible PnP, there are two ways to enter Extended Function and read or write the configuration
registers. HEFRAS (CR26 bit 6) can be used to select one out of these two methods of entering the
Extended Function mode as follows:
HEFRAS
0
1
address and value
write 87h to the location 2Eh twice
write 87h to the location 4Eh twice
After Power-on reset, the value on RTSA# (pin 43) is latched by HEFRAS of CR26. In Compatible PnP,
a specific value (87h) must be written twice to the Extended Functions Enable Register (I/O port address
2Eh or 4Eh). Secondly, an index value (02h, 07h-FFh) must be written to the Extended Functions Index
Register (I/O port address 2Eh or 4Eh same as Extended Functions Enable Register) to identify which
configuration register is to be accessed. The designer can then access the desired configuration
register through the Extended Functions Data Register (I/O port address 2Fh or 4Fh).
After programming of the configuration register is finished, an additional value (AAh) should be written to
EFERs to exit the Extended Function mode to prevent unintentional access to those configuration
registers. The designer can also set bit 5 of CR26 (LOCKREG) to high to protect the configuration
registers against accidental accesses.
The configuration registers can be reset to their default or hardware settings only by a cold reset (pin
MR = 1). A warm reset will not affect the configuration registers.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
W83627F-AW 制造商:WINBOND 功能描述: 制造商:Winbond Electronics Corp 功能描述:
W83627G 制造商:WINBOND 制造商全稱(chēng):Winbond 功能描述:Winbond LPC I/O
W83627GAW 制造商:Winbond Electronics Corp 功能描述:
W83627G-AW 功能描述:IC LPC SUPER I/O 128-PQFP RoHS:是 類(lèi)別:集成電路 (IC) >> 接口 - 專(zhuān)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(pán) 供應(yīng)商設(shè)備封裝:24-QFN 裸露焊盤(pán)(4x4) 包裝:帶卷 (TR) 安裝類(lèi)型:表面貼裝 產(chǎn)品目錄頁(yè)面:1015 (CN2011-ZH PDF) 其它名稱(chēng):296-25223-2
W83627HF 制造商:WINBOND 制造商全稱(chēng):Winbond 功能描述:WINBOND I/O