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參數資料
| 型號： | W83977TF |
| 廠商： | WINBOND ELECTRONICS CORP |
| 英文描述： | Multi-Function I/O Port Controller(用于個人計算機的多功能輸入/輸出口控制器) |
| 中文描述： | 多功能I / O端口控制器（用于個人計算機的多功能輸入/輸出口控制器） |
| 文件頁數： | 130/160頁 |
| 文件大小： | 1012K |
| 代理商： | W83977TF |
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W83977TF
PRELIMINARY
Publication Release Date: March 1998
-119-
Revision 0.62
CRF1 (Default 0x00)
Bit 7 - 4: Reserved. Return zero when read.
Bit 3 - 0: Devices' idle status.
These bits indicate that the individual device's idle timer expires due to no I/O access, no IRQ,
and no external input to the device. These 4 bits are controlled by the printer port, FDC, UART A,
and UART B power down machines individually. Writing a 1 clears this bit, and writing a 0 has no
effect. Note that: the user is not supposed to change the status while the power management
function is enabled.
Bit 3: PRTIDLSTS. Printer port idle status.
= 0
printer port is now in the working state.
= 1
printer port is now in the sleeping state due to no printer port access, no IRQ, no DMA
acknowledge, and no transition on BUSY,
ACK
, PE, SLCT, and
ERR
pins in a
preset expiry time period.
Bit 2: FDCIDLSTS. FDC idle status.
= 0
FDC is now in the working state.
= 1
FDC is now in the sleeping state due to no FDC access, no IRQ, no DMA
acknowledge, and no enabling of the motor enable bits in the DOR register in a
preset expiry time period.
Bit 1: URAIDLSTS. UART A idle status.
= 0
UART A is now in the working state.
= 1
UART A is now in the sleeping state due to no UART A access, no IRQ, the receiver
is now waiting for a start bit, the transmitter shift register is now empty, and no
transition on MODEM control input lines in a preset expiry time period.
Bit 0: URBIDLSTS. UART B idle status.
= 0
UART B is now in the working state.
= 1
UART B is now in the sleeping state due to no UART A access, no IRQ, the receiver
is now waiting for a start bit, the transmitter shift register is now empty, and no
transition on MODEM control input lines in a preset expiry time period.
CRF2 (Default 0x00)
Bit 7 - 4: Reserved. Return zero when read.
Bit 3 - 0: Devices' trap status.
These bits indicate that the individual device wakes up due to any I/O access, IRQ, and external
input to the device. The device's idle timer reloads the preset expiry depending on which device
wakes up. These 4 bits are controlled by the printer port, FDC, UART A, and UART B power down
machines respectively. Writing a 1 clears this bit, and writing a 0 has no effect. Note that: the
user is not supposed to change the status while power management function is enabled.
Bit 3: PRTTRAPSTS. Printer port trap status.
= 0
the printer port is now in the sleeping state.
= 1
the printer port is now in the working state due to any printer port access, any IRQ,
any DMA acknowledge, and any transition on BUSY,
ACK
, PE, SLCT, and
ERR
pins.
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相關代理商/技術參數 |
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|---|---|
| W83977TF(EOL) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:W83877TF plus KBC. CIR. RTC |
| W83977TF_98 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:WINBOND I/O |
| W83977TF-A | 制造商:WINBOND 制造商全稱:Winbond 功能描述:I/O chip disk drive adapter |
| W83977TF-AW | 制造商:WINBOND 制造商全稱:Winbond 功能描述:WINBOND I/O |
| W83977TF-P | 制造商:WINBOND 制造商全稱:Winbond 功能描述:I/O chip disk drive adapter |
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