ucb1200 NXP Semiconductors, ucb1200 Datasheet - Page 29

• Manufacturer Part Number: ucb1200
• Description: Advanced Modem/audio Analog Front-end
• Manufacturer: NXP Semiconductors

Philips Semiconductors
GENERAL PURPOSE I/O
The UCB1200 has 10 programmable digital input/output (I/O) pins. These pins can be independently programmed as
input or output using IO_DIR[0:9] in control register 1. The output data is determined by the content of IO_DATA[n] in
control register 0, while the actual status of these pins can be read from the IO_DATA[n] bits in control register 0.
The data on the IO0-IO9 pins are feed into the interrupt control block, where they can generate an interrupt on the rising
and/or falling edge of these signals.
1998 Jul 22
Advanced modem/audio analog front-end
to interrupt module
IO_DATA[n]
(Write)
IO_DATA[n]
(Read)
IO_DIR[n]
Fig.24 Block diagram of I/O pin circuit.
29
IO[n]
Product specification
UCB1200