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W83877TF

W83877TF首页预览图
型号: W83877TF
PDF文件:
  • W83877TF PDF文件
  • W83877TF PDF在线浏览
功能描述: WINBOND I/O
PDF文件大小: 968.02 Kbytes
PDF页数: 共154页
制造商: WINBOND[Winbond]
制造商LOGO: WINBOND[Winbond] LOGO
制造商网址: http://www.winbond.com
捡单宝W83877TF
PDF页面索引
120%
W83877TF/W83877TG
Publication Release Date: May 2006
-53- Revision 0.7
7.3.2 Data and ecpAFifo Port
Modes 000 (SPP) and 001 (PS/2) (Data Port)
During a write operation, the Data Register latches the contents of the data bus on the rising edge of
the input. The contents of this register are output to the PD0-PD7 ports. During a read operation, ports
PD0-PD7 are read and output to the host. The bit definitions are as follows:
7 6 5 4 3 2 1 0
PD0
PD1
PD2
PD3
PD4
PD5
PD6
PD7
Mode 011 (ECP FIFO-Address/RLE)
A data byte written to this address is placed in the FIFO and tagged as an ECP Address/RLE. The
hardware at the ECP port transmits this byte to the peripheral automatically. The operation of this
register is defined only for the forward direction. The bit definitions are as follows:
7 6 5 4 3 2 1 0
Address or RLE
Address/RLE
7.3.3 Device Status Register (DSR)
These bits are at low level during a read of the Printer Status Register. The bits of this status register
are defined as follows:
7 6 5 4 3 2 1 0
nFault
Select
PError
nAck
nBusy
111
Bit 7: This bit reflects the complement of the Busy input.
Bit 6: This bit reflects the nAck input.
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