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CX20493 Datasheet(数据表) 43 Page - Conexant Systems, Inc

部件型号  CX20493
说明  SmartV.XX Modem
下载  94 Pages
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制造商  CONEXANT [Conexant Systems, Inc]
网页  http://www.conexant.com
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CX20493 Datasheet(HTML) 43 Page - Conexant Systems, Inc

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CX81801-7x/8x SmartV.XX Modem Data Sheet
102199B
Conexant
3-11
Table 3-2. CX81801 Modem Pin Signal Definitions for Parallel Interface (PARIF = High) (Continued)
Label
Pin
I/O
I/O Type
Signal Name/Description
DAA Interface
VOICE# (PE1)
16
O
It/Ot2
Voice Relay Control. This output (typically active low) used to
control the normally open voice relay.
HS_LCS (PE4)
19
I
It/Ot2
Handset Line Current Sense. LCS is an active high input that
indicates a handset off-hook status. Not required for
data/fax/voice/speakerphone operation. If not used, connect to
GND through 47 K
Ω.
Not Used
TESTP
110
I
Itpu
Test. Used for factory test only. Leave open.
XCLK
49
O
It/Ot2
Not Used. Leave open.
PHS2
121
O
Ot2
Not Used. Leave open.
SR4RIN
45
I
Itk
Not Used. Leave open.
PA2
27
I
It/Ot2
Not Used. Leave open.
PA6
32
O
It/Ot2
Not Used. Leave open.
PD7
46
I/O
It/Ot2
Not Used. Leave open.
P_PX00
41
I/O
It/Ot8
Not Used. Leave open.
P_PX02
42
I/O
Itpu/Ot2
Not Used. Leave open.
P_PX03
43
I/O
Itpu/Ot2
Not Used. Leave open.
RESERVED (PA0)
24
O
It/Ot2
Not Used. Leave open.
RESERVED (PA1)
26
O
It/Ot2
Not Used. Leave open.
RESERVED (PA3)
28
I
Itpu/Ot2
Not Used. Leave open.
RESERVED (PA4)
29
I
Itpu/Ot2
Not Used. Leave open.
RESERVED (PA5)
31
I
It/Ot2
Reserved. Connect to +3.3V though 47 K
Ω.
RESERVED (PE0)
14
O
It/Ot8
Not Used. Leave open.
RESERVED (PE2)
17
O
It/Ot2
Not Used. Leave open.
RESERVED (PE5)
21
I/O
It/Ot2
Reserved. Connect to +3.3V though 47 K
Ω.
RESERVED (PE6)
22
O
It/Ot2
Not Used. Leave open.
RESERVED (GP00)
52
I/O
It/Ot2
Not Used. Leave open.
RESERVED (P_PA00)
55
I/O
Itpu/Ot2
Not Used. Leave open.
RESERVED (P_PA04)
54
I/O
Itpu/Ot2
Not Used. Leave open.
RESERVED (P_PA05)
56
I/O
Itk/Ot2
Not Used. Leave open.
RESERVED (P_PB01)
51
I/O
Itpu/Ot2
Not Used. Leave open.
RESERVED
(P_BD2CLK)
59
I/O
Itpu/Ot2
Not Used. Leave open.
Notes:
1. I/O Types: See Table 3-5.
2. Interface Legend:
DIB
Digital Isolation Barrier
EB
Expansion Bus
HB
Host Bus
NC
No internal pin connection
VC
Voice Codec
RESERVED = No external connection allowed (may have internal connection).




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