CX82100 Home Network Processor Data Sheet
Table 2-3. CX82100 HNP Pin Signal Definitions (Continued)
Pin Signal
Pin No.
I/O
I/O Type
Signal Name/Description
SDRAM/SRAM Interface (Continued)
MWE#
B14
E12
O
Ot4
Ot4
SDRAM/SRAM Memory Write Enable. This active low output
enables write access to SDRAM/SRAM. Connect to SDRAM/SRAM
WE# input through 51 Ω.
SDRAM Clock Enable/SRAM A17.
MCKE
MCLK
O
O
For SDRAM interface, this active high output enables the SDRAM
clock. Connect to SDRAM CLKE input through 51 Ω.
For SRAM interface, this signal is address A17 output. Connect to
SRAM A17 input through 51 Ω.
E14
Ot4
SDRAM Clock.
For SDRAM interface, this signal supplies the clock to the SDRAM.
Connect to SDRAM CLK input through 51 Ω. All SDRAM signals
are sampled on the positive (rising) edge.
For SRAM interface, this pin not used. Leave open.
General Purpose Input/Output (GPIO)
Recommended GPIO usage is listed in Table 2-9.
GPIO31
GPIO27
GPIO26
GPIO24
GPIO21
GPIO20
GPIO19
GPIO18
GPIO17
GPIO8
C6
G4
A8
A1
C3
B1
B2
A2
A3
D5
E5
D6
E6
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
O
Itpu/Ot4
Itpu/Ot4
Itpu/Ot4
Itpu/Ot4
Itpu/Ot4
Itpu/Ot4
Itpu/Ot4
Itpu/Ot4
Itpu/Ot4
Itpu/Ot4
Itpu/Ot4
Itpu/Ot4
Itpu/Ot4
Application Dependent. Reset state = Z(pu).
Application Dependent. Reset state = Z(pu).
Application Dependent. Reset state = Z(pu).
Application Dependent. Reset state = Z(pu).
Application Dependent. Reset state = Z(pu).
Application Dependent. Reset state = Z(pu).
Application Dependent. Reset state = Z(pu).
Application Dependent. Reset state = Z(pu).
Application Dependent. Reset state = low.
Application Dependent. Reset state = low.
Application Dependent. Reset state = Z(pu).
Application Dependent. Reset state = Z(pu).
Application Dependent. Reset state = Z(pu).
Test
GPIO7
GPIO6
GPIO5
O
O
TST[3:0]
D4, A4, B4, C5
Test Pins. Test configuration pins used only during the
manufacturing/test process.
For normal operation, connect TST[3:0] to ground.
No Connect Pins (Balls)
NC
C1, C2, D2, D3,
F7
No Connect. These pins (solder balls) are not connected to
internal circuitry. Leave open.
Notes:
1. I/O Types: See Table 2-4.
2. Unless otherwise specified, output pins or input pins with internal pulldowns or pullups can be left open if not used.
3. The Reset State notation indicates the state of the pin upon power-on and whether or not it has an internal pullup. Z means
a high impedance state (an input) and pu/pd means the pin has an internal pullup/pulldown.
101306C
Conexant Proprietary and Confidential Information
2-15
CONEXANT [ CONEXANT SYSTEMS, INC ]
