SPC563M64L7 datasheet(23/48 Pages) STMICROELECTRONICS

23 / 48 page

SPC563Mxx

Device overview

Doc ID 13850 Rev 6

23/48

The PLL has the following major features:

●

Input clock frequency from 4 MHz to 20 MHz

●

Voltage controlled oscillator (VCO) range from 256 MHz to 512 MHz, resulting in

system clock frequencies from 16 MHz to 80 MHz with granularity of 4 MHz or better

●

Reduced frequency divider (RFD) for reduced frequency operation without forcing the

PLL to relock

●

3 modes of operation

–

Bypass mode with PLL off

–

Bypass mode with PLL running (default mode out of reset)

–

PLL normal mode

●

Each of the three modes may be run with a crystal oscillator or an external clock

reference

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Programmable frequency modulation

–

Modulation enabled/disabled through software

–

Triangle wave modulation up to 100 kHz modulation frequency

–

Programmable modulation depth (0% to 2% modulation depth)

–

Programmable modulation frequency dependent on reference frequency

●

Lock detect circuitry reports when the PLL has achieved frequency lock and

continuously monitors lock status to report loss of lock conditions

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Clock Quality Module

–

detects the quality of the crystal clock and cause interrupt request or system reset

if error is detected

–

detects the quality of the PLL output clock. If an error is detected, causes a system

reset or switches the system clock to the crystal clock and causes an interrupt

request

●

Programmable interrupt request or system reset on loss of lock

3.3.6

Calibration EBI

The Calibration EBI controls data transfer across the crossbar switch to/from memories or

peripherals attached to the calibration tool connector in the calibration address space. The

Calibration EBI is only available in the calibration tool. The Calibration EBI includes a

memory controller that generates interface signals to support a variety of external

memories. The Calibration EBI memory controller supports legacy flash, SRAM, and

asynchronous memories. In addition, the calibration EBI supports up to three regions via

chip selects (two chip selects are multiplexed with two address bits), along with programmed

region-specific attributes. The calibration EBI supports the following features:

●

22-bit address bus (two most significant signals multiplexed with two chip selects)

●

16-bit data bus

●

Multiplexed mode with addresses and data signals present on the data lines

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