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參數(shù)資料
| 型號(hào)： | AT7601FG |
| 廠商： | AME, Inc. |
| 英文描述： | Printer Port Controller |
| 中文描述： | 打印機(jī)端口控制器 |
| 文件頁數(shù)： | 17/35頁 |
| 文件大小： | 195K |
| 代理商： | AT7601FG |
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AME, Inc.
17
AT7601F
Printer Port Controller
Rev. B.02
Mode [7:5]
Description
000
Standard Parallel Port Mode. In this mode the FIFO is reset and common collector drivers
are used on the control lines (STB#, AFD#, lNIT# and SLIN#). Setting the direction bit will
not tri-state the output drivers in this mode.
001
PS/2 Parallel Port Mode. Same as above except that direction may be used to
tri-state the data lines and reading the data register returns the value on the data lines and
not the value in the data register. All drivers have active pull-ups (push-pull).
010
Parallel Port FIFO Mode. This is the same as 000 except that bytes are written or DMAed
to the FIFO. FIFO data is automatically transmitted using the standard parallel port protocol.
Note that this mode is only useful when direction is 0. All drivers have active pull-ups (push-
pull).
011
ECP Parallel Port Mode. In the forward direction (direction is 0) bytes placed into the ECP-
DFIFO and bytes written to the ECP-AFIFO are placed in a single FIFO and transmitted
automatically to the peripheral using ECP parallel port and packed into bytes in the ECP-
DFIFO. All drivers have active pull-ups (push-pull).
100
Selects EPP Mode: In this mode, EPP is selected if the EPP supported option in selected
in configuration register L3-CRFO. All drivers have active pull-ups (push-pull).
101
Reserved
110
Test Mode. In this mode the FIFO may be written and read, but the data will not be
transmitted on the parallel port. All drivers have active pull-ups (push-pull).
111
Configuration Mode. In this mode the Cnfg-A, Cnfg-B registers are accessible at
Ox400 and Ox401. All drivers have active pull-ups (push-pull).
Table 11. Mode Table
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