w83l517g Winbond Electronics Corp America, w83l517g Datasheet - Page 98
w83l517g
Manufacturer Part Number
w83l517g
Description
Winbond Lpc I/o For Notebook W83l517d/ W83l517d-f
Manufacturer
Winbond Electronics Corp America
Datasheet
1.W83L517G.pdf
(133 pages)
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Bit 7: This bit reflects the complement of the Busy input.
Bit 6: This bit reflects the nAck input.
Bit 5: This bit reflects the PError input.
Bit 4: This bit reflects the Select input.
Bit 3: This bit reflects the nFault input.
Bit 2-0: These three bits are not implemented and are always logic one during a read.
9.3.4
The bit definitions are as follows:
Bit 6, 7: These two bits are logic one during a read and cannot be written.
Bit 5: This bit has no effect and the direction is always out if mode = 000 or mode = 010. Direction is
Bit 4: Interrupt request enable. When this bit is set to a high level, it may be used to enable interrupt
input.
Bit 3: This bit is inverted and output to the SLIN# output.
Bit 2: This bit is output to the INIT# output.
Bit 1: This bit is inverted and output to the AFD# output.
Bit 0: This bit is inverted and output to the STB# output.
9.3.5
This mode is defined only for the forward direction. The standard parallel port protocol is used by a
hardware handshake to the peripheral to transmit bytes written or DMAed from the system to this
FIFO. Transfers to the FIFO are byte aligned.
Device Control Register (DCR)
cFifo (Parallel Port Data FIFO) Mode = 010
valid in all other modes.
0
1
0
1
the parallel port is in output mode.
the parallel port is in input mode.
requests from the parallel port to the CPU due to a low to high transition on the ACK#
The printer is not selected.
The printer is selected.
7
1
6
1
5
4
3
- 98 -
2
1
W83L517D/W83L517D-F
0
strobe
autofd
nInit
SelectIn
ackIntEn
Direction
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