ds3104 Maxim Integrated Products, Inc., ds3104 Datasheet - Page 106

• Manufacturer Part Number: ds3104
• Description: Ds3104 Line Card Timing Ic With Synchronous Ethernet Support
• Manufacturer: Maxim Integrated Products, Inc.

Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bit 7: GPIO4 Direction (GPIO4D). This bit configures the data direction for the GPIO4 pin. When GPIO4 is an
input its current state can be read from GPSR:GPIO4. When GPIO4 is an output, its value is controlled by the
GPIO4O configuration bit.
Bit 6: GPIO3 Direction (GPIO3D). This bit configures the data direction for the GPIO3 pin. When GPIO3 is an
input its current state can be read from GPSR:GPIO3. When GPIO3 is an output, its value is controlled by the
GPIO3O configuration bit.
Bit 5: GPIO2 Direction (GPIO2D). This bit configures the data direction for the GPIO2 pin. When GPIO2 is an
input its current state can be read from GPSR:GPIO2. When GPIO2 is an output, its value is controlled by the
GPIO2O configuration bit.
Bit 4: GPIO1 Direction (GPIO1D). This bit configures the data direction for the GPIO1 pin. When GPIO1 is an
input its current state can be read from GPSR:GPIO1. When GPI13 is an output, its value is controlled by the
GPIO1O configuration bit.
Bit 3: GPIO4 Output Value (GPIO4O). When GPIO4 is configured as an output (GPIO4D = 1) then this bit
specifies the output value.
Bit 2: GPIO3 Output Value (GPIO3O). When GPIO3 is configured as an output (GPIO3D = 1) then this bit
specifies the output value.
Bit 1: GPIO2 Output Value (GPIO2O). When GPIO2 is configured as an output (GPIO2D = 1) then this bit
specifies the output value.
Bit 0: GPIO1 Output Value (GPIO1O). When GPIO1 is configured as an output (GPIO1D = 1) then this bit
specifies the output value.
Rev: 012108
________________________________________________________________________________________ DS3104-SE
0 = Input
1 = Output
0 = Input
1 = Output
0 = Input
1 = Output
0 = Input
1 = Output
0 = Low
1 = High
0 = Low
1 = High
0 = Low
1 = High
0 = Low
1 = High
GPIO4D
7
0
GPIO3D
6
0
GPCR
GPIO Configuration Register
6Eh
GPIO2D
5
0
GPIO1D
4
0
GPIO4O
3
0
GPIO3O
2
0
GPIO2O
1
0
106 of 136
GPIO1O
0
0