T8207-BAL-DT Agere Systems, Inc., T8207-BAL-DT Datasheet - Page 26

• Manufacturer Part Number: T8207-BAL-DT
• Description: CelXpres ATM interconnect. Dry-bagget, tape & reel .
• Manufacturer: Agere Systems, Inc.

CelXpres T8207
Advance Data Sheet
ATM Interconnect
September 2001
7
General-Purpose I/O (GPIO)
The T8207 has eight programmable general-purpose I/O pins called GPIO. These GPIO pins may be indepen-
dently programmed, via the GPIO_oe[7:0] bits in the GPIO output enable register (address 39h), to be inputs or
outputs. If a GPIO_oe bit is set to ‘1,’ the corresponding GPIO pin is an output, or if cleared to ‘0,’ the correspond-
ing GPIO pin is an input. Input values are read from the GPIO_in[7:0] bits in the GPIO input value register (address
3Dh), and output values are written to the GPIO_out[7:0] bits in the GPIO output value register (address 3Bh). The
GPIO[7:0] pins all have internal 50 k
pull-up resistors.
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Agere Systems Inc.