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參數(shù)資料
| 型號： | ST7554TQF7 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | V.90 USB WORLD MODEM CONTROLLER |
| 中文描述： | .90 USB世界調(diào)制解調(diào)器控制器 |
| 文件頁數(shù)： | 3/11頁 |
| 文件大?。?/td> | 148K |
| 代理商： | ST7554TQF7 |
PIN LIST
Name
Pin
Type
Description
XTALIN
9
I
Crystal Input
XTALOUT
10
O
Crystal Output
RESET
12
I
Reset Function to initialise the device (active low)
VBUS
5
I
Positive Voltage Regulator Input, connected to USB VBUS
GNDBUS
3
I
Regulator Ground, connected to USB Ground (0V) (see Note 1)
VREGA
6
I/O
Positive Regulated Analog Input/Output Power Supply
VREGD
4
I/O
Positive Regulated Digital Input/Output Power Supply
PSM
8
I
Power Supply Mode (Bus-powered or Self-powered)
D+
2
I/O
Positive Data Signal of Differential Data Bus conforming to USB Standard
Specification 1.0
D-
1
I/O
Negative Data Signal of Differential Data Bus conforming to USB Standard
Specification 1.0
TRxD
35
I/O
Transmit/Receive Data Led
DC
36
I/O
DC mask
BUZEN
37
I/O
Buzzer Amplifier Enable/Mute
PULSE
38
I/O
Pulse dialing
DISHS
39
I/O
Disconnect external phone
RFC
40
I/O
Refresh
LED
41
I/O
LED control
CD
42
I/O
Carrier Detect Led
CLID
43
I/O
Caller ID
HO
45
I/O
Hook Control
HSDT
46
I/O
Current sense
RI
48
I/O
Ring Indicator
HC1
27
O
Modem Codec Hardware Control mode selection
PDOWN
26
O
SSI Powerdown bit output (active low)
MCLK
29
O
SSI Master Clock Output
DAASEL
34
I
Select Silicon or Discrete DAA Configuration Mode
FS
28
I
SSI Frame Synchronisation Input
DOUT
31
O
SSI Serial Data Output
DIN
30
I
SSI Serial Data Input
FLTPLL
11
OA
PLL filter analog output. Must be connected to analog ground AGND with
33pF capacitor
DGND
32
I
Digital Ground (0V) (see Note 1)
AGND
7
I
Analog Ground (0V) (see Note 1)
RESERVED
13 to 25-33-44
-
Not connected
RESERVED
47
-
Connect to digital ground DGND
Note 1 :
Analog and digital ground pins must be tied together to USB ground GNDBUS.
7
ST7554
3/11
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