User Manual

GE863-PRO
3
Product Description
80285ST10036a Rev. 1 DRAFT- 24/04/08
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 35 of 53
4.14 USB Device port
The application Processor provides one USB Device port compliant to the Universal Serial Bus (USB)
V2.0 full-speed device specifications.
4.15 USB Host port
The application Processor provides two USB Host ports compliant to the Universal Serial Bus (USB)
V2.0 full-speed and low speed specifications and to the Open Host Controller Interface (OHCI)
standard.
The USB Host Port integrates a root hub and transceivers on downstream ports. It provides several
high-speed half-duplex serial communication ports at a baud rate of 12 Mbit/s.
Up to 127 USB devices and the USB hub can be connected to the USB host in the USB “tiered star”
topology.
4.16 Clock outputs
The Application processor provides two programmable clock outputs that can output:
• Slow clock
• Main Clock
• PLLA clock
• PLLB clock
With a prescaler that can divide the source clock by a factor ranging from 1 to 64.
4.17 GPIO ports
The Application processor provides 90 General Purpose I/O multiplexed with the peripheral pins.
This pins can be moved with the Parallel I/O (PIO) controller in blocks of 32 pins or manually one by
one.
Each IO pin can be fully configured as Input, Output, Open Drain or not, with or without internal Pull-
ups, with or without Input Glitch filter.