PCD6003 datasheet(14/96 Pages) PHILIPS

14 / 96 page

2001 Apr 17

Philips Semiconductors

Product speciﬁcation

Digital telephone answering machine chip

PCD6003

Table 2

Descriptions and frequency values for signals shown in Fig.4

Notes

1. These values are only valid if the RTC mode bit CKCON.6 has been set according to the PLL_IN frequency used

(see also Table 6).

2. If the IOM Slave mode is activated, these clock signals are synchronized to the externally applied FSC.

3. Proper IOM functionality is only guaranteed at DSP clock frequencies of 28 and 42 MHz. If the IOM Slave mode is

activated, the externally applied DCK and FSC signals are used.

4. These master frequencies do not comply to IOM specification. For 3.58 MHz crystal operation, proper IOM

functionality is therefore only guaranteed in Master mode.

SIGNAL

FUNCTION

VALUE (MHz)

PLL_IN 3.456

PLL_IN 3.580

Microprocessor and DSP clock signals

EMG_CLK

emergency clock

3.456

3.580

CLK_42

DSP selectable clock frequency

41.472

42.960

CLK_28

DSP selectable clock frequency

27.648

28.640

CLK_21

microcontroller selectable clock frequency

20.736

21.480

CLK_14

microcontroller selectable clock frequency

13.824

14.320

CLK_7

DSP and microcontroller selectable clock frequency

6.912

7.160

CLK_1

DSP and microcontroller selectable clock frequency

1.152

1.193

CODEC clock signals

CLK_21

input clock for phase corrected CLK3_OUT

20.736

21.480

CLK3_EMG

EMG_CLK input to CLK_3 multiplexer

3.456

3.580

CLK3_CORR

frequency corrected CODEC clock (24/25

× 3.58 MHz)

−

3.437(1)(2)

CLK3_OUT

phase corrected 3.456 MHz CODEC clock

3.456(1)(2)

−

CLK14_CODEC

input clock for CODECs

13.824

14.320

IOM clock/timing signals

DCKmaster

the IOM master clock signal DCK generated by the TICB

1.536(1)(3)

1.527(1)(3)(4)

FSCmaster

the IOM master frame sync FSC generated by the TICB

8 kHz(1)(3)

7.955 kHz(1)(3)(4)

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