PCD6001 Ver la hoja de datos (PDF) - Philips Electronics
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PCD6001 Datasheet PDF : 96 Pages
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Philips Semiconductors
Digital telephone answering machine chip
Product specification
PCD6001
Table 2 Descriptions and frequency values for signals shown in Fig.4
SIGNAL
FUNCTION
Microprocessor and DSP clock signals
EMG_CLK
CLK_42
CLK_28
emergency clock
DSP selectable clock frequency
DSP selectable clock frequency
CLK_21
CLK_14
CLK_7
CLK_1
microcontroller selectable clock frequency
microcontroller selectable clock frequency
DSP and microcontroller selectable clock frequency
DSP and microcontroller selectable clock frequency
CODEC clock signals
CLK_21
CLK3_EMG
CLK3_CORR
CLK3_OUT
input clock for phase corrected CLK3_OUT
EMG_CLK input to CLK_3 multiplexer
frequency corrected CODEC clock (24/25 × 3.58 MHz)
phase corrected 3.456 MHz CODEC clock
CLK14_CODEC input clock for CODECs
IOM clock/timing signals
DCKmaster
FSCmaster
the IOM master clock signal DCK generated by the TICB
the IOM master frame sync FSC generated by the TICB
VALUE (MHz)
PLL_IN 3.456 PLL_IN 3.580
3.456
41.472
27.648
20.736
13.824
6.912
1.152
3.580
42.960
28.640
21.480
14.320
7.160
1.193
20.736
3.456
−
3.456(1)(2)
13.824
1.536(1)(3)
8 kHz(1)(3)
21.480
3.580
3.437(1)(2)
−
14.320
1.527(1)(3)(4)
7.955 kHz(1)(3)(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.
2001 Apr 17
14
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