pnx1700 NXP Semiconductors, pnx1700 Datasheet - Page 272

• Manufacturer Part Number: pnx1700
• Description: Connected Media Processor
• Manufacturer: NXP Semiconductors

1. Introduction
The PNX17xx Series has 61 pins that are capable of operating as General Purpose
software Input Output (GPIO) pins. 16 of them are dedicated GPIO pins. The other 45
pins are assigned to the other PNX17xx Series modules, like the Audio Out module,
but they can be re-used as GPIO pins if they are not being used for their normal
functional behavior. So these are designated as optional GPIO pins that can either
operate in regular mode or in GPIO mode. All 61 pins support common features:
The 61 pins have the same GPIO capabilities. However some of the dedicated GPIO
pins have additional features like:
After a PNX17xx Series system reset all the GPIO pins start in GPIO mode and in
input mode.
•
•
•
•
•
•
•
•
Chapter 8: General Purpose Input
Output Pins
PNX17xx Series Data Book – Volume 1 of 1
Rev. 1 — 17 March 2006
software I/O - set a pin or pin group, enable a pin (or a pin group) and inspect pin
values
precise timestamping of internal and external events (up to 12 signals
simultaneous)
signal event sequence monitoring or signal generation (up to 4 signals
simultaneous)
timer source selection for TM5250
clocks - these pins are possible clock source for pattern generation or sampling
mode. Or they are simply used to provide a clock to peripherals on the PNX17xx
Series system board.
wake-up event - used to wake-up PNX17xx Series from deep sleep mode, see
Chapter 5 The Clock
boot option - determines the boot settings of PNX17xx Series, see
Boot
watchdog - this is a subset of the software I/O mode since the TM5250 CPU
would toggle this pin at regular intervals in order to prevent an external watchdog
to reset the entire system. Alternately the internal watchdog timer of PNX17xx
Series system can be used, see
Module.
Module.
Chapter 4
Reset.
Preliminary data sheet
Chapter 6