cx82100 Conexant Systems, Inc., cx82100 Datasheet - Page 173

• Manufacturer Part Number: cx82100
• Description: Home Network Processor Hnp
• Manufacturer: Conexant Systems, Inc.

9.3
9.3.1
101306C
Bit(s)
31:8
4:1
7
6
5
0
Type
RW
RW
RW
RW
GPIO Registers
GPIO Option Register for GPIO[39:37; 32] (GPIO_OPT: 0x003500B0)
Default
1’b0
1’b0
1’b0
1’b0
Conexant Proprietary and Confidential Information
GPIO register bits are described in this section.
This register selects general or special purpose use for the GPIO[39:37; 32] pins.
Note:
GPIO_Sel7
GPIO_Sel6
GPIO_Sel5
GPIO_Sel0
CX82100 Home Network Processor Data Sheet
Voltage levels for GPIO[39:37; 32] pins assigned to special purpose functions
by bits in the GPIO_OPT register are reflected in the GPIO_DATA_IN3
register, however, the GPIO_DATA_OUT3 register bits are not applicable.
Name
Reserved.
Select FCLKIO or GPIO39 Usage.
Note: Pin PLLBP high causes FCLKIO to be selected regardless of
this bit state.
Select BCLKIO or GPIO38 Usage.
Note: Pin PLLBP high causes BCLKIO to be selected regardless of
this bit state.
Select GPIO37 or HCS4# Usage.
Reserved.
Select GPIO32 or HCS0# Usage.
0 = FCLKIO/GPIO39 pin is used as GPIO39.
1 = FCLKIO/GPIO39 pin is used as FCLKIO.
0 = BCLKIO/GPIO38 pin is used as GPIO38.
1 = BCLKIO/GPIO38 pin is used as BCLKIO.
0 = HAD31 (HCS4#)/GPIO37 pin is used as HCS4#.
1 = HAD31 (HCS4#)/GPIO37 pin is used as a GPIO37.
0 = HC00 (HCS0#)/GPIO32 pin is used as HCS0#.
1 = HC00 (HCS0#)/GPIO32 pin is used as GPIO32.
Description
9-3