HFC-SUSB Cologne Chip AG, HFC-SUSB Datasheet - Page 64

• Manufacturer Part Number: HFC-SUSB
• Description: Isdn S/t HDLC Basic Rate Controller
• Manufacturer: Cologne Chip AG

863 C EC2
7.1.2 External wake-up circuitry
The wake-up circuitry is optional. It enables the HFC-S USB to wake up by incoming INFOx (non
INFO0) signals on the S/T interface. If the wake-up circuitry is not used the AWAKE pin must be
grounded.
Figure 8: External wake-up circuitry
WAKE_UP_1 and WAKE_UP_2 are inputs from the receiver circuitry (see also: 7.1.1 External receiver
circuitry).
Part List
Part
C17
Q3
R22
R23
R24
&$ _V ("
C 17
*
The remote wake-up feature must be enabled by the USB command SET FEATURE
DEVICE_REMOTE_WAKEUP (see USB Specification 1.1, table 9-6). By default it is disabled.
R 23
Q 3
important!
G N D
R 22
R 24
Value
100pF
BC860C
4M7
10k
100k
(from receiver circuitry)
(from receiver circuitry)
(HFC-S USB, pin 28)
W A K E _U P _2
W A K E _U P _1
A W A K E
Cologne
Chip
:e\i " !