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PCD6003

Digital telephone answering machine chip

Philips Electronics 

Philips Semiconductors

Digital telephone answering machine chip

Product specification

PCD6003

9.2 System clocks

Figure 5 shows the multiplexers with their input and control signals for the DSP processor clock, the microcontroller

clock, the CODEC clock (CLK_3) and the chip input clock frequency. The functional position of the CODEC clock

multiplexer is shown in Fig.4.

handbook, full pagewidth

EMG_CLK

CLK_1

CLK_7

CLK_14

CLK_21

EMG_CLK

CLK_1

CLK_7

CLK_42

CLK_28

EMG_CLK

CLK3_CORR

CLK3_OUT

µC_CLK

CKCON[2, 3 or 7]

SPCON[4]

DSP_CLK_IN

CKCON[4, 5 or 7]

Q

R FF S

CLK_3

DSP_CLK

DSP_WAKEUP

DSP_IDLE

CDCCNTRL_CLK

CLK_3_DRT1

CLK_3_DRT2

CKCON[6 or 7]

SPCON[0 or 1]

SPCON[2 or 3]

FS1

÷4

÷2

÷2

÷5

CKCON[0 or 1]

3

2

1

0

FS_event

TIME_event

MGT431

2001 Apr 17

Fig.5 Clock and event rate selection.

15

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