參數(shù)資料
型號: FX919A
英文描述: 4-Level FSK Packet Data Modem
中文描述: 四級別FSK信號分組數(shù)據(jù)調(diào)制解調(diào)器
文件頁數(shù): 4/44頁
文件大小: 1537K
代理商: FX919A
4-Level FSK Modem Data Pump
FX919A
1996 Consumer Microcircuits Limited
4
D/919A/4
1.3
Signal List
Package
P4/D2/D5
Signal
Description
Pin No.
Name
Type
1
IRQN
O/P
A 'wire-ORable' output for connection to the host
μ
C's Interrupt Request input. This output has a
low impedance pull down to V
SS
when active
and is high impedance when inactive.
2
3
4
5
6
7
8
9
D7
D6
D5
D4
D3
D2
D1
D0
BI
BI
BI
BI
BI
BI
BI
BI
)
)
)
) 8-bit bidirectional 3-state
μ
C interface data
) lines.
)
)
)
10
RDN
I/P
Read. An active low logic level input used to
control the reading of data from the modem into
the host
μ
C.
11
WRN
I/P
Write. An active low logic level input used to
control the writing of data into the modem from
the host
μ
C.
12
Vss
Power
The negative supply rail (ground).
13
CSN
I/P
Chip Select. An active low logic level input to the
modem, used to enable a data read or write
operation.
14
15
A0
A1
I/P
I/P
) Two logic level modem register select
) inputs.
16
XTALN
O/P
The output of the on-chip oscillator.
17
XTAL/CLOCK
I/P
The input to the on-chip oscillator, for external
Xtal circuit or clock.
18
19
DOC 2
DOC 1
O/P
O/P
) Connections to the Rx level measurement
) circuitry. A capacitor should be connected
) from each pin to V
SS.
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