T-8110L AGERE [Agere Systems], T-8110L Datasheet - Page 81

• Manufacturer Part Number: T-8110L
• Manufacturer: AGERE [Agere Systems]

February 2004
Agere Systems Inc.
8 General-Purpose I/O
8.1 GPIO Control Registers
8.1.2 GPIO Read Mask Register
The GPIO read mask register controls the masking of any GP signals being used as general-purpose register bits
on a read access to the GPIO register.
Table 67. GPIO Read Mask Register
8.1.3 GPIO R/W Register
The GPIO R/W register provides direction control for any of the GP signals being used as general-purpose register
bits.
Table 68. GPIO R/W Register
Byte Address
Byte Address
0x00501
0x00502
GPIO Read Mask
GPIO R/W
Name
Name
(continued)
(continued)
Bit(s)
Bit(s)
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
Mnemonic
Mnemonic
G7MEB
G6MEB
G5MEB
G4MEB
G3MEB
G2MEB
G1MEB
G0MEB
G7DSB
G6DSB
G5DSB
G4DSB
G3DSB
G2DSB
G1DSB
G0DSB
Value
Value
Ambassador T8110L H.100/H.110 Switch
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Unmask GPIO bit 7 (default).
Mask GPIO bit 7, return 0 on a read.
Unmask GPIO bit 6 (default).
Mask GPIO bit 6, return 0 on a read.
Unmask GPIO bit 5 (default).
Mask GPIO bit 5, return 0 on a read.
Unmask GPIO bit 4 (default).
Mask GPIO bit 4, return 0 on a read.
Unmask GPIO bit 3 (default).
Mask GPIO bit 3, return 0 on a read.
Unmask GPIO bit 2 (default).
Mask GPIO bit 2, return 0 on a read.
Unmask GPIO bit 1 (default).
Mask GPIO bit 1, return 0 on a read.
Unmask GPIO bit 0 (default).
Mask GPIO bit 0, return 0 on a read.
GPIO bit 7 direction is input (default).
GPIO bit 7 direction is output.
GPIO bit 6 direction is input (default).
GPIO bit 6 direction is output.
GPIO bit 5 direction is input (default).
GPIO bit 5 direction is output.
GPIO bit 4 direction is input (default).
GPIO bit 4 direction is output.
GPIO bit 3 direction is input (default).
GPIO bit 3 direction is output.
GPIO bit 2 direction is input (default).
GPIO bit 2 direction is output.
GPIO bit 1 direction is input (default).
GPIO bit 1 direction is output.
GPIO bit 0 direction is input (default).
GPIO bit 0 direction is output.
Function
Function
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