參數(shù)資料
型號(hào)： W83C553F-G
英文描述： W83C553F-G Highly Integrated System I/O Controller for Power PCTM (South Bridge) QFP 208
中文描述： W83C553F接枝高度集成的系統(tǒng)I / O控制器的電力PCTM（南橋）QFP封裝208
文件頁數(shù)： 99/159頁
文件大?。?/td> 3991K
代理商： W83C553F-G
W83C553F
Electrical Specifications
WINBOND SYSTEMS LABORATORY
96
Operational Control Word 3 Register
Function
:
The Operational Control Word 3 (OCW3) Register serves three functions. It enables special mask mode
and controls poll mode and IRR/ISR register read.
Type
:
Read/Write
Bit Description
:
Bit 7:
Reserved. This bit must be "0."
Bit 6:
SMM. Special Mask Mode. If ESMM and SMM are both "1," the interrupt controller enters
SMM. If ESMM is "1" and SMM is "0," the interrupt controller is in normal mask mode. When
ESMM is "0," SMM has no effect.
Bit 5:
ESMM. Enable Special Mask Mode. If ESMM is "1," the SMM bit is enabled to set or reset
Special Mask Mode. If ESMM is "0," the SMM bit is a "don't care."
Bits [4:3]:
OCW3SEL[1:0]. OCW3 Select. Always ensure bit 4 is "0" and bit 3 is "1" when writing an
OCW3.
Bit 2:
POLC. When this Poll Mode Command bit is "0," the Poll Command is not issured. When this
bit is "1," the next I/O read to the interrupt controller is treated as an interrupt acknowledge
cycle.
Bits [1:0]:
REGREAD and ISRIRR. These Register Read Command bits provide control for reading the
In-Service Register (ISR) and Interrupt Request Register (IRR), as shown below.
Bit 1
Bit 0
Function
0
0
No action
0
1
No action
1
0
Read IRQ register IRR
1
1
Read IS register ISR
相關(guān)PDF資料
PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
W83C553FY-G 制造商:Nuvoton Technology Corp 功能描述:I/O Controller Phase Controller 208-Pin PQFP 制造商:Winbond Electronics 功能描述:I/O CONTROLLER 制造商:Nuvoton Technology 功能描述:I/O Controller Phase Controller 208-Pin PQFP
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W83C554FY 制造商:Nuvoton Technology Corp 功能描述:I/O Controller Phase Controller 制造商:Nuvoton Technology 功能描述:I/O Controller Phase Controller
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