W6694 Datasheet, PDF (6/33 Pages) Winbond – USB Bus ISDN S/T-Controller

Preliminary W6694
4. PIN DESCRIPTION
Table 4.1 W6694 Pin Descriptions
SYMBOL
D+
D-
PIN NO. I/O
USB Bus
38
I/O USB D+ data line.
39
I/O USB D- data line.
FUNCTION
UCLK1
UCLK2
SR1
SR2
SX1
SX2
XTAL1
XTAL2
GCIDCL
GCIFSC
GCIDD
GCIDU
PFCK1
PFCK2
PBCK
PTXD
PRXD
41
I 24 MHz crystal/oscillator clock input.
42
O 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: 7.68
MHz ±100 PPM.
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.
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