Datasheet

82
32117D–AVR-01/12
AT32UC3C
8. System Control Interface (SCIF)
Rev: 1.0.2.0
8.1 Features
• Controls integrated oscillators and PLLs
• Supports 2x General Purpose crystal oscillators, 0.4MHz-20MHz
• Supports 2x Phase-Locked-Loop, 80-240 MHz
• Supports 32 KHz low power oscillator (OSC32K)
• Integrated 115KHz RC Oscillator (RCSYS)
• Controls 8 MHz / 1 MHz integrated RC oscillator (RC8M)
• Controls 120 MHz integrated RC oscillator (RC120M)
• Generic clocks with wide frequency range provided
• Controls bandgap voltage reference through control and calibration registers
• Controls Brown-out detectors and supply monitors
• Controls Voltage Regulator behavior and calibration
• Two 32-bit general purpose low power registers
8.2 Description
The System Control Interface (SCIF) controls the Oscillators, PLL, Generic Clocks, BODs, the
voltage regulators and general purpose low power registers.
8.3 I/O Lines Description
8.4 Product Dependencies
8.4.1 I/O Lines
The SCIF provides a number of generic clock outputs, which can be connected to output pins,
multiplexed with GPIO lines. The programmer must first program the GPIO controller to assign
these pins to their peripheral function. If the I/O pins of the SCIF are not used by the application,
they can be used for other purposes by the GPIO controller. Oscillators pins are also multiplexed
with GPIO. When oscillators are used, the related pins are controlled directly by the SCIF, over-
riding GPIO settings.
Table 8-1. I/O Lines Description
Pin Name Pin Description Type
XIN0 Crystal 0 Input Analog/Digital
XIN1 Crystal 1 Input Analog/Digital
XIN32 Crystal 32 Input Analog/Digital
XOUT0 Crystal 0 Output Analog
XOUT1 Crystal 1 Output Analog
XOUT32 Crystal 32 Output Analog
GCLK[1:0] Generic Clock Output Digital