SP5611 데이터 시트보기 (PDF) - Mitel Networks

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SP5611

1·3GHz Bidirectional I2C Bus Controlled Synthesiser

Mitel Networks 

SP5611

TEST MODES

As explained in the functional description, The SP5611 can

be programmed into a numb er of test modes. These are invoked

by programming Hex codes into byte 4, those most commonly

used being shown in Table 6.

Other codes will also apply due to don’t care conditions, which

are assumed to be 1 in the Table.

NOTE:

When looking at FPD or FCOMP signals from ports P7 and P6. byte

should be sent twice, first to set the desired reference division

ratio then to switch on the chosen test mode.

The pulses can then be measured by simply connecting an

oscilloscope or counter to the relevant output pin on the test board.

Operation mode description

Normal operation, reference divider ratio = 1024

Normal operation, reference divider ratio = 512

Charge pump source (down), FL set to 0

Charge pump sink (up), FL set to 1

Port P7 = FPD/2

Port P7 = FPD, P6 = FCOMP

Charge pump disable, reference divider ratio = 512

Varactor line disable, reference divider ratio = 512

Charge pump and varactor linedisable, reference divider ratio = 512

Hex code (byte 4)

CP high mode

CC

CE

E2

E6

EA

EE

DE

CF

DF

CP low mode

8C

8E

A2

A6

AA

AE

9E

8F

9F

Table 5 Operation modes

10

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