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參數(shù)資料
| 型號： | PCT789T-A |
| 英文描述： | PCI HSP56 World MicroModem/PCT303DW/PCT1789W |
| 中文描述： | 世界MicroModem/PCT303DW/PCT1789W的PCI HSP56 |
| 文件頁數(shù)： | 28/70頁 |
| 文件大小： | 872K |
| 代理商： | PCT789T-A |
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PC-TEL, Inc.
28
1789W0DOCDAT06A-0299
PCT1789W DATA SHEET
PCT789T-A B
ASE
I/O L
OCATIONS
!
PRELIMINARY
PRELIMINARY
PCT789T-A B
ASE
I/O L
OCATIONS
PCT789T-A Base I/O Definition
For compatibility reasons, the base I/O address space is
limited to 8 bytes, which is less than enough to support
the rich features provided by the PCT789T-A modem
chip. An index addressing method has been adopted to
extend the on-chip register space beyond what can be
provided.
All internal registers are in 16-bit word format. Each one
is accessed by writing to INDEX register first with the
appropriate index address then read or write to the
addressed register through the DATA port. The index
range allocated for on-chip registers is from index 0
through 15.
DATA[15:0]
–
Data Register
. This base I/O location is the 16-bit data port for the host CPU to communicate with
the PCT789T-A on-chip FIFO buffers and the control/status registers.
INDEX[15:0]
–
Index Register
. This base I/O location is write-only; it is the address register for all on-chip FIFO
buffers and registers.
Table 13 PCT789T-A Base I/O Definition
Address
BASE+0
BASE+1
BASE+2
BASE+3
BASE+4
BASE+5
BASE+6
BASE+7
Write
DATA[7:0]
DATA[15:8]
Reserved
Reserved
INDEX[7:0]
Reserved
Reserved
Reserved
Read
DATA[7:0]
DATA[15:8]
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCT789T-C | 制造商:PCTEL 功能描述:PCI MODEM CHIP |
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