AccessRunner ADSL-USB Modem Device Set Data Sheet
Table 3-1. P5200 UIC Hardware Signal Definitions (Continued)
Label
Pin
I/O
I/O Type
Signal Name/Description
SDRAM/SRAM INTERFACE
Multiplexed Row and Column Address Lines. Connect to
SDRAM/SRAM A[11:0], respectively.
MA[11:00]
132-136, 139-145
O
Ot4
It/Ot4
Ot4
Ot4
Ot4
Ot4
Data Lines. Connect to SDRAM/SRAM D[15:0], respectively.
MD[15:00]
MB0
102-106, 109-
116, 119-121
I/O
O
Bank Address Select 0. Connect to SDRAM/SRAM Bank Address
Select 0 input for 8 MB SDRAM; leave open for 2 MB SDRAM.
149
146
124
125
Bank Address Select 1. Connect to SDRAM/SRAM Bank Address
Select 1 input.
MB1
O
Input/Output Mask 1. Connect to SDRAM/SRAM I/O Mask High
input.
MM1
O
Input/Output Mask 0. Connect to SDRAM/SRAM I/O Mask Low
MM0
O
input.
SDRAM Clock. Connect to SDRAM Clock input.
MCLK
MCKE
122
123
O
O
Ot4
Ot4
SDRAM Clock Enable. Active high; enables SDRAM clock. Connect
to SDRAM Clock Enable input.
SDRAM Row Address Strobe. Active low; starts SDRAM access
with strobe of row address. Connect to SDRAM RAS input.
MRAS#
MCAS#
MWE#
MCS#
126
129
131
130
O
O
O
O
Ot4
Ot4
Ot4
Ot4
SDRAM Column Address Strobe. Active low; strobes column
address and data bytes. Connect to SDRAM CAS input.
SDRAM Memory Write Enable. Active low; indicates write access to
SDRAM. Connect to SDRAM Write Enable input.
SDRAM Memory Chip Select. Active low; enables SDRAM
command decoder. Connect to SDRAM chip select input.
LED INTERFACE
Receive Data LED. Illuminated when data is received from the ADSL
line.
LED_RXD
(GPIO20)
2
O
O
O
O
Ot4
Ot4
Ot4
Ot4
Transmit Data LED. Illuminated when data is transmitted to the
ADSL line.
LED_TXD
(GPIO19)
176
1
Showtime LED. Illuminated when the ADSL transceiver is in
Showtime Mode.
LED_SHOWTIME
(GPIO18)
Ready LED. Illuminated when the device is successfully enumerated
on the USB.
LED_READY
(GPIO070)
160
POWER AND GROUND
Core Supply Voltage. Connect to +1.8V.
Supply Voltage. Connect to +1.8V through filter.
I/O Supply Voltage. Connect to +3.3V.
VDD
25, 66, 99, 154
21
PWR
PWR
PWR
PWR
PWR
PWR
VDDA
VDDO
8, 16, 37, 47, 57,
71, 81, 91, 107,
117, 127, 137,
147, 158, 171
I/O Clamp Power Supply. Connect to +5V if available, otherwise
VGG
23, 101
REF
REF
connect to +3.3V.
Core Ground. Connect to digital ground.
I/O Ground. Connect to digital ground.
VSS
26, 67, 100, 155
GND
GND
GND
GND
VSSO
9, 17, 38, 48, 58,
72, 82, 92, 108,
118, 128, 138,
148, 159, 172
Ground. Connect to digital ground.
VSSA
22
GND
GND
3-6
Conexant
100427B
CONEXANT [ CONEXANT SYSTEMS, INC ]
