PMB2341 Просмотр технического описания (PDF) - Infineon Technologies

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PMB2341

10-pin Single PLL

Infineon Technologies 

Confidential

PMB 2341

preliminary

Applications

Table 4-10 Test mode installation bits

Control Bits

mode 1 mode 2

Mode

1

1

OPERATE:

Normal operation of PLL and RI Buffer in installed mode.

MFO pin has programmed level.

0

1

not used:

identical to OPERATE

1

0

Testmode RCNTOUT:

Charge pump is turned off. R-counter output at

multifunctional MFO pin.

0

0

Testmode NCNTOUT:

Charge pump is turned off. N-counter output at

multifunctional MFOMFO pin.

4.3 Special programming sequences

Fast wake-up programming:

When the circuit is connected to the supply voltage all registers are undefined. Due to

the fact that each counter is loading its new start value after it is decremented to „zero“,

the start-up time of the counters with the programmed values is too long for some

applications. If the device has previously been set to ALLOFF- or AMPRUN-mode (see

Table 5) afterwards is turned to operating mode ALLRUN, the counters are starting

immediatly with the preprogrammed start values. Therefore for fast startup after standby

the following data transfer sequence is recommended:

Table 4-11 Fast Wake Up Data Transfer Sequence

Step

Serial Data Transfer Sequence

1

Long Control Word: ’OPERATE’

2

Set A-/N-Counter: AMPRUN mode

3

Set R-Counter

4

Set A-/N-Counter, AMPRUN mode

5

Set A-/N-Counter, ALLRUN mode

Wireless Components

4-7

Specification, February 2000

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