User's Manual

SIGNAL
DESCRIPTION
SIGNAL
VOLTAGE
LEVEL
IMPEDANCE
PHON
E
CURREN
T
I/O INTERFACE
TCU SIDE PHONE SIDE
SIGNAL
NAME
Phone_VRE
F
O
SIGNAL
TYPE
ANALOG
OR
DIGITAL
COMMENTS
DC supply output Analog
PIN
#
PIN
TYPE
J1-7
J1-8
J1-9
J1-10
J1-11
J1-12
DNAD_RX
5VSW_FRO
M_PHONE
DNAD_TX
GND
DNAD_CTS
(Removed)
2.6V +/- 2%
supply output from
NAD to TCU
Min.:2.548V.
Max:2.652V
NA NA
CAIT Receive Data
from TCU to
Phone.
Digital input
VHigh:
0.65*Vdd_P to
Vdd_p+0.3V
VLow:
-0.3V to
0.35*Vdd_p
*Vdd_P=2.85V
10K
10mA
Digital I
5V +/- 5%
supply output from
NAD to TCU
DC supply output Min.:4.75V.
Max:5.25V
NA NA
70mA Analog O
CAIT transmit
Data
from phone to
TCU
Digital Output
Voh:
Vdd_P-0.45
to Vdd_P
Vol:0 to 0.45
Vdd_P=2.85
V
47K
Digital
O
Power Ground Ground NA NA Analog
CAIT CTS data
from TCU from
Phone
Digital Input VHigh:
0.65*Vdd_P to
Vdd_p+0.3V
VLow:
-0.3V to
0.35*Vdd_p
*Vdd_P=2.85V
10K Digital I
TCU
2.2uF
QSC6055
VREG_MSMP
2.6v
VPH_PW
R
QSC6055
VSW_5V
VREG_5
V
10u
F
Current Limit
Switch(200mA)
5VSW_PWR_E
N
1000pF
2.2uH
2.6V
V4 – A4
V3 – B9
* DNI
1000pF
* DNI
0
: Phone_VREF
is routed to pullups
on RESET, UART,
PCM, lines
0.01 f 1000pf1000pf
5V
Phone_VREF
100k
* DNI
V4 – A5
V3 – B10
* DNI
1000pF
* DNI
0
Phone_VREF
100k
* DNI
VREG_2.85V
QSC6055
CAIT_RX
4.7K
c
QSC6055
CAIT_TX
VREG_2.85V
4.7K
2.2K(DNI)