參數(shù)資料
型號(hào)： PCD6003U
廠商： NXP SEMICONDUCTORS
元件分類： 通信及網(wǎng)絡(luò)
英文描述： Digital telephone answering machine chip
中文描述： SPECIALTY TELECOM CIRCUIT, UUC
文件頁(yè)數(shù)： 16/96頁(yè)
文件大?。?/td> 385K
代理商： PCD6003U
2001 Apr 17
16
Philips Semiconductors
Product specification
Digital telephone answering machine chip
PCD6003
9.2.1
S
ELECTION OF SYSTEM CLOCKS
Selection of system clocks involves:
Selection of the crystal input clock in conjunction with
PLL on/off selection (SYMOD register)
Selection of clocks for the DSP, microcontroller and
CODEC, together with microcontroller timing interrupt
rates (CKCON register)
Activation, deactivation of individual clocks or
deactivation of the whole TICB in order to get an
optimum power consumption (SPCON register).
SYMOD, SPCON and CKCON are SFR registers in the
digital section which can be directly accessed by the
microcontroller. Sections 9.2.2 to 9.2.4 summarize the
control registers and settings used for system clock
selection.
The activation of the DSP, and the digital part of both
CODECs is controlled via the SPCON SFR.
The clock rates of the DSP and microcontroller, and the
microcontroller timing interrupt rates are set via the
CKCON SFR.
9.2.2
A
NALOG
S
YSTEM
M
ODE
R
EGISTER
(SYMOD)
Table 3
Analog System Mode Register (SFR address C5H); reset state 00H
9.2.3
S
YSTEM
P
OWER AND
C
LOCK
C
ONFIGURATION
R
EGISTER
(SPCON)
Table 4
System Power and Clock Configuration Register (SFR address 99H); reset state 00H
9.2.4
C
LOCK
C
ONTROL
R
EGISTER
(CKCON)
Table 5
Clock Control Register (SFR address 9AH); reset state 00H
7
6
5
4
3
2
1
0
input clock 1 input clock 0 PLL off/on
V
MIC
off/on
CODEC2; analog
D/A
(loudspeaker)
off/on
CODEC1; analog
D/A
(to_line)
off/on
A/D
(microphone)
off/on
A/D
(from_line)
off/on
7
6
5
4
3
2
1
0
system off
spare
spare
DSP on
CODEC2; digital
D/A
(loudspeaker)
off/on
CODEC1; digital
D/A
(to_line)
off/on
A/D
(microphone)
off/on
A/D
(from_line)
off/on
7
6
5
4
3
2
1
0
EMG mode
RTC mode
DSP clock 1
DSP clock 0
micro clock 1
micro clock 0
FS_event 1
FS_event 0
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