參數(shù)資料
型號(hào): W83977TF(EOL)
英文描述: W83877TF plus KBC. CIR. RTC
中文描述: W83877TF加比聯(lián)。稅務(wù)局局長。時(shí)鐘
文件頁數(shù): 123/161頁
文件大?。?/td> 592K
代理商: W83977TF(EOL)
W83977EF/ CTF
PRELIMINARY
Publication Release Date: March 1999
-114 -
Revision A1
CRE8 (GP20, Default 0x01)
Bit 7 - 5: Reserved.
Bit 4 - 3: Select Function.
= 00 Select basic I/O function
= 01 Reserved
= 10 Select alternate function: Keyboard Reset (connected to KBC P20)
= 11 Reserved
Bit 2: Int En
= 1 Enable Common IRQ
= 0 Disable Common IRQ
Bit 1: Polarity: 1: Invert, 0: No Invert
Bit 0: In/Out: 1: Input, 0: Output
CRE9 (GP21, Default 0x01)
Bit 7 - 5: Reserved
Bit 4 - 3: Select Function.
= 00 Select Basic I/O function
= 01 Reserved
= 10 Select 2nd alternate function: Keyboard P13 I/O
= 11 Reserved
Bit 2: Int En
= 1 Enable Common IRQ
= 0 Disable Common IRQ
Bit 1: Polarity: 1: Invert, 0: No Invert
Bit 0: In/Out: 1: Input, 0: Output
CREA (GP22, Default 0x01)
Bit 7 - 5: Reserved.
Bit 4 - 3: Select Function.
= 00 Select Basic I/O function.
= 01 Reserved
= 10 Select 2nd alternate function: Keyboard P14 I/O.
= 11 Reserved
Bit 2: Int En
= 1 Enable Common IRQ
= 0 Disable Common IRQ
Bit 1: Polarity: 1: Invert, 0: No Invert
Bit 0: In/Out: 1: Input, 0: Output
@ @
CREB (GP23, Default 0x01)
Bit 7 - 5: Reserved.
Bit 4 - 3: Select Function.
= 00 Select Basic I/O function
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