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Preliminary Data Sheet
W6694A USB-ISDN S/T-Controller
-9-
Publication Release Date: May, 2001
Revision 1.03
4. PIN DESCRIPTION
TABLE 4.1 PIN DESCRIPTIONS
Note:
The suffix # indicates active LOW signal.
Symbol
Pin No.
I/O
Function
USB Bus
USB D+ data line
USB D- data line
24 MHz crystal/oscillator clock input
24 MHz crystal clock output. Left unconnected if
use oscillator.
ISDN Signals and External Crystal
45
I
S/T bus receiver input (-). This is normal polarity.
Reverse polarity is also OK.
46
I
S/T bus receiver input (+)
48
O
S/T bus transmitter output(+)
1
O
S/T bus transmitter output(-)
2
I
Crystal or Oscillator clock input. The clock
frequency: 7.68MHz
±
100PPM.
3
O
Crystal clock output. Left unconnected when using
oscillator.
GCI Bus
6
I
GCI bus data clock 1.536 MHz
7
I
GCI bus frame synchronization clock
8
I
GCI bus data downstream (input)
9
O
GCI bus data upstream (output)
PCM Bus
10
O
PCM port 1 frame synchronization signal with 8
KHz repetition rate and 8 bit pulse width
11
O
PCM port 2 frame synchronization signal with 8
KHz repetition rate and 8 bit pulse width
12
O
PCM bit clock of 1.536 MHz
15
O
PCM data output
16
I
PCM data input
External Serial EEPROM Interface
17
O
Serial EEPROM chip select
18
O
Serial EEPROM data clock
19
I
Serial EEPROM data input. Internal 10k ohm pull-
up is provided.
20
O
Serial EEPROM data output
Power and Ground
47,44
I
ISDN S/T analog power (5V), Ground
5,4
14,13
D+
D-
UCLK1
UCLK2
38
39
41
42
I/O
I/O
I
O
SR1
SR2
SX1
SX2
XTAL1
XTAL2
GCIDCL
GCIFSC
GCIDD
GCIDU
PFCK1
PFCK2
PBCK
PTXD
PRXD
EPCS
EPSK
EPDI
EPDO
VDD1,VSS1
VDD21,VSS21
VDD22,VSS22
I
Digital power (5V), Ground