AccessRunner ADSL-USB Modem Device Set Data Sheet
Table 3-20. CX20441 LD Hardware Signal Definitions
Signal Name
Pin
I/O
I/O Type
Signal Name/Description
P5200 UIC INTERFACE
Power Down. Active low power down control input. Connect to UIC
PWRDWN#
5
I
It
AFE_RST#
CX20431 AFE INTERFACE
Input Driver Positive. Transmit driver input positive from the AFE.
Connect to AFE OUTP_TX through 1 µF.
INP_DRV
INM_DRV
23
2
I
I
Ia
Input Driver Negative. Transmit driver input negative input from the
AFE. Connect to AFE OUTM_TX through 1 µF.
Ia
HYBRID INTERFACE
Output Driver Positive. Transmit driver output positive to the hybrid
circuit. I = 280 mA.
OUTP_DRV
OUTM_DRV
18
7
O
O
Oa
Oa
max
Output Driver Negative Transmit driver output negative to the hybrid
circuit. I = 280 mA.
max
MISCELLANEOUS
Bias. Current setting external resistor. Connect to GND through
124 kΩ resistor (+1%).
RBIAS
4
REF
REF
POWER AND GROUND
Analog Power. Connect to +5V through filter.
Analog Ground. Connect to GND.
AVDD
AVSS
6, 19
8, 17
PWR
GND
PWR
GND
NO CONNECT
No Connect. These pins are not connected to internal circuitry.
NC
1, 3, 9-16, 20-22,
24-32
NOTES:
I/O Types: See Table 3-21.
Table 3-21. CX20441 LD Input/Output Type Descriptions
I/O Type
Description
It
Digital input, +5V tolerant, C = 8 pF
IN
Ia
Analog input
Oa
Analog output
NOTES:
1. See analog electrical characteristics in Table 3-22.
2. I/O Type corresponds to the device Pad Type. The I/O column in tables refers to signal I/O direction used in the application.
3-26
Conexant
100427B
CONEXANT [ CONEXANT SYSTEMS, INC ]
