MPC93R52 REVISION 6 3/14/16

6

©2016 Integrated Device Technology, Inc.

MPC93R52 DATA SHEET

APPLICATIONS INFORMATION

Programming the MPC93R52

The MPC93R52 supports output clock frequencies from

16.67 to 240 MHz. Different feedback and output divider

configurations can be used to achieve the desired input to

output frequency relationship. The feedback frequency and

divider should be used to situate the VCO in the frequency

lock range between 200 and 480 MHz for stable and optimal

operation. The FSELA, FSELB, FSELC pins select the

desired output clock frequencies. Possible frequency ratios

of the reference clock input to the outputs are 1:1, 1:2, 1:3,

3:2 as well as 2:3, 3:1, and 2:1. Table 7 and Table 8 illustrate

the various output configurations and frequency ratios

supported by the MPC93R52. See also Figure 3 to Figure 6

for further reference. A 2 output divider cannot be used for

feedback.

Table 7. MPC93R52 Example Configuration (F_RANGE = 0)

PLL Feedback fref(1) [MHz]

1.

fref is the input clock reference frequency (CCLK).

FSELA

FSELB

FSELC

QA[0:4]:fref ratio

QB[0:3]:fref ratio

QC[0:1]:fref ratio

VCO

 4(2)

2.

QAx connected to FB_IN and FSELA=0.

50–120

0

0

0

fref

(50-120 MHz)

fref

(50-120 MHz)

fref

 2 (100-240 MHz)

0

0

1

fref

(50-120 MHz)

fref

(50-120 MHz)

fref

(50-120 MHz)

1

0

0

fref

 23 (33-80 MHz) fref

(50-120 MHz)

fref

 2 (100-240 MHz)

1

0

1

fref

 23 (33-80 MHz) fref

(50-120 MHz)

fref

(50-120 MHz)

VCO

 6(3)

3.

QAx connected to FB_IN and FSELA=1.

33.3–80

1

0

0

fref

(33-80 MHz)

fref

 32 (50-120 MHz) fref  3 (100-240 MHz)

1

0

1

fref

(33-80 MHz)

fref

 32 (50-120 MHz) fref  32 (50-120 MHz)

1

1

0

fref

(33-80 MHz)

fref

 3 (100-240 MHz) fref  3 (100-240 MHz)

1

1

1

fref

(33-80 MHz)

fref

 3 (100-240 MHz) fref  32 (50-120 MHz)

Table 8. MPC93R52 Example Configurations (F_RANGE = 1)

PLL Feedback fref(1) [MHz]

1.

fref is the input clock reference frequency (CCLK).

FSELA

FSELB

FSELC

QA[0:4]:fref ratio

QB[0:3]:fref ratio

QC[0:1]:fref ratio

VCO

 8(2)

2.

QAx connected to FB_IN and FSELA=0.

25-60

0

0

0

fref

(25-60 MHz)

fref

(25-60 MHz)

fref

 2 (50-120 MHz)

0

0

1

fref

(25-60 MHz)

fref

(25-60 MHz)

fref

(25-60 MHz)

1

0

0

fref

 23 (16-40 MHz) fref

(25-60 MHz)

fref

 2 (50-120 MHz)

1

0

1

fref

 23 (16-40 MHz) fref

(25-60 MHz)

fref

(25-60 MHz)

VCO

 12(3)

3.

QAx connected to FB_IN and FSELA=1.

16.67–40

1

0

0

fref

(16-40 MHz)

fref

 32 (25-60 MHz) fref  3 (50-120 MHz)

1

0

1

fref

(16-40 MHz)

fref

 32 (25-60 MHz) fref  32 (25-60 MHz)

1

1

0

fref

(16-40 MHz)

fref

 3 (50-120 MHz)

fref

 3 (50-120 MHz)

1

1

1

fref

(16-40 MHz)

fref

 3 (50-120 MHz)

fref

 32 (25-60 MHz)