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Clock modulator control register (cmcr), Cmcr – FUJITSU MB91460 SERIES FR60 User Manual

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Chapter 17 Clock Modulator

2.Clock Modulator Registers

Clock Modulator Control Register (CMCR)

The Control Register (CMCR) has the following functions:

Set the modulator to power down mode

Modulator enable/disable in frequency modulation mode

Indicates the status of the modulator

Figure 2-2 Configuration of the clock modulator control register (CMCR)

The bits FMODRUN, FMOD, PDX control or indicate the status of the frequency modulation mode. Frequency

modulation mode needs some additional configuration (CMPR register).

bit 0

PDX

Power down bit

0

power down mode

1

power up

bit 1

FMOD

Frequency modulation enable bit

0

Frequency modulation mode disabled

1

Frequency modulation mode enabled

bit 3

FMOD

RUN

Modulator status in frequency modulation mode

0

Clock frequency unmodulated

1

Clock frequency modulated

R/W

:

Readable and writable

R

:

Read only

X

:

Undefined value

-

:

Undefined

:

Initial value

1

0

3

2

5

4

7

6

Initial value

X 0 0 1 0 X 0 0

B

H

0004BB

CMCR

Re-
served

Re-
served

Re-
served

-

FMOD

FMOD PDX

RUN

R/W R/W R/W R

- R/W R/W

bit 4,5,6

Reserved

bit 4

Always write 1 to this bit

Always write 0 to this bit

bit 5,6

-

-