參數(shù)資料
型號： W83977CTF-AW
英文描述： PERIPHERAL (MULTIFUNCTION) CONTROLLER
中文描述： 周邊（多功能）控制器
文件頁數(shù)： 120/161頁
文件大小： 592K
代理商： W83977CTF-AW
W83977EF/ CTF
PRELIMINARY
Publication Release Date: March 1999
-111 -
Revision A1
CRE2 (GP12, Default 0x01)
Bit 7 - 5: Reserved.
Bit 4 - 3: Select Function.
= 00 Select Basic I/O function.
= 01 Select 1st alternate function: Watch Dog Timer Output.
= 10 Reserved
= 11 Reserved
Bit 2: Reserved.
Bit 1: Polarity: 1: Invert, 0: No Invert
Bit 0: In/Out: 1: Input, 0: Output
CRE3 (GP13, Default 0x01)
Bit 7 - 5: Reserved.
Bit 4 - 3: Select Function.
= 00 Select Basic I/O function.
= 01 Select 1st alternate function: Power LED output.
= 10 Reserved
= 11 Reserved
Bit 2: Reserved.
Bit 1: Polarity: 1: Invert, 0: No Invert
Bit 0: In/Out: 1: Input, 0: Output
CRE4 (GP14, Default 0x01)
Bit 7 - 6:
= 00 Address decoder is 1-Byte boundary.
= 01 Address decoder is 2-Byte boundary.
= 10 Address decoder is 4-Byte boundary.
= 11 Address decoder is 8-Byte boundary.
Bit 5: Reserved.
Bit 4 - 3: Select Function.
= 00 Select Basic I/O function.
= 01 Select 1st alternate function: General Purpose Address Decoder(Active Low when
Bit 1 = 0, Decode two byte address).
= 10 Select 2nd alternate function: Keyboard Inhibit(P17).
= 11 Reserved
Bit 2: Reserved.
Bit 1: Polarity: 1: Invert, 0: No Invert
Bit 0: In/Out: 1: Input, 0: Output
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相關代理商/技術參數(shù)
參數(shù)描述
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