參數(shù)資料
型號: W83627SF
英文描述: W83627F plus Smart Card Reader Interface. VID Control. GP I/O?
中文描述: W83627F加上智能卡閱讀器接口。 VID控制。大獎(jiǎng)賽的I / O?
文件頁數(shù): 79/147頁
文件大?。?/td> 1348K
代理商: W83627SF
W83627SF
PRELIMINARY
Publication Release Date: Nov. 2000
Revision 0.60
- 72 -
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.
6.3.4 Device Control Register (DCR)
The bit definitions are as follows:
7 6 5 4 3 2 1 0
1
1
strobe
autofd
nInit
SelectIn
ackIntEn
Direction
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
valid in all other modes.
0
the parallel port is in output mode.
1
the parallel port is in input mode.
Bit 4: Interrupt request enable. When this bit is set to a high level, it may be used to enable interrupt
requests from the parallel port to the CPU due to a low to high transition on the
ACK#
input.
Bit 3: This bit is inverted and output to the SLIN#
output.
0
The printer is not selected.
1
The printer is selected.
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.
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