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