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TL16PNP100AFN データシート(PDF) 10 Page - Texas Instruments

部品番号 TL16PNP100AFN
部品情報  STANDALONE PLUG-AND-PLAY
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ホームページ  http://www.ti.com
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TL16PNP100A
STANDALONE PLUG-AND-PLAY (PnP) CONTROLLER
SLLS200C – MARCH 1995 – REVISED SEPTEMBER 1997
10
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
During configuration, assuming the system assigned the device address range 0x220 to 0x23F, EEPROM is
low and A4 from the ISA bus passes to A4 on the TL16PNP100A. When configuration is complete EEPROM
goes high, and A4 at the input of TL16PNP100A is reset to 0. Since the block size is 16, the TL16PNP100A looks
at address bits A9 to A4. When the address on the A9 to A0 is in the range of 0x220 to 0x22F, A9 to A4 is as
follows:
A9
A8
A7
A6
A5
A4
A3
A1
A1
A0
100010
X
X
X
X
and CS0 is asserted low.
When the address is in the range of 0x230 to 0x23F, A9 to A4 is as follows:
A9
A8
A7
A6
A5
A4
A3
A1
A1
A0
100011
X
X
X
X
However, since A4 at the input of PNP100A is forced to 0, A9 to A4 is the same as in the range of 0x220 to 0x22F
and TL16PNP100A asserts CS0 low.
obtaining Windows 95
™ logo
To obtain the Windows 95
™ logo, the card should be able to decode 16-bit I/O address. Since the TL15PNP100A
uses 10-bit address decoding, an OR gate is needed on-board to decode the upper 6 address bits (SA15-SA10).
The customer can use this gate by changing the I/O port descriptors in the EEPROM to reflect the 16-BIT ISA
address. However, the customer must make sure that the upper 6 BITS in the I/O port descriptors have the same
minimum and maximum base in the address registers.
For example, a logical device requires a base address between 0200h and 0300h with an 8-byte as a base
alignment and one I/O port requested. (Notice that the requested base address is such that the upper six bits
in the minimum and maximum base address ranges are the same as in this example all are considered to be
zeros). To meet the requested resources, the following steps must be done:
1.
Modify the gate logic on the board as shown in Figure 4.
SA15
SA14
SA13
SA12
SA11
SA10
OR GATE
LOGIC
CS to Logical Device
CS I/O (From TL16PNP100A)
Figure 4. Gate Logic Modification
All the signals on the left side of the OR gate are ISA signals.
Window 95 is a trademark of Microsoft Corporation.


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