CSP1027 Datasheet, PDF (5/64 Pages) Agere Systems – CSP1027 Voice Band Codec for Cellular Handset and Modem Applications

Data Sheet
December 1999
CSP1027 Voice Band Codec for
Cellular Handset and Modem Applications
4 Architectural Information
EIGS
MIC
A/D INPUT
BLOCK
A/D
AUX
INSEL IRSEL
cioc0 cioc0
TEST
cioc0
M
U
X
SYNC-CUBIC
DIGITAL
DECIMATION
FILTER
1 MHz OVERSAMPLING CLOCK
7th-ORDER
IIR
LOW-PASS
FILTER
3rd-ORDER
IIR
HIGH-PASS
FILTER
8 kHz
1/125
SIO
CONTROL
HPFE
cioc3
STATUS
IOCK
SYNC
SADD
SMODE2
SMODE1
SMODE0
M
C
O
U
D
S
X
X
R
(A/D)
M
U ^DO
X
MUTE
cioc0
AOUTP
AOUTN
OUTPUT
AMP
ANALOG
LOW-PASS
FILTER
(35 kHz)
D/A
M
U
X
DIGITAL
MODULATOR
AND GAIN
ADJUST
SAMPLE/HOLD
AND 7th-ORDER
M
IIR
U
LOW-PASS
X
FILTER
3rd-ORDER
IIR
HIGH-PASS
FILTER
M
U
T
E
C
D
X
(A/D)
I
S
DI
R
XOSCEN
CLK
XLO
XHI
CKO1
CKO2
CLOCK
GENERATION
TEST DITHER
cioc0 cioc3
OGSEL
cioc0
1 MHz OVERSAMPLING CLOCK
CDIV0 (cioc1), CDIV1 (cioc1),
CDIV2 (cioc0), CDIV3 (cioc2),
CDIF0 (cioc2), CDIF1 (cioc3),
CDIF2 (cioc3)
VREG
(3.0 V)
REFC
HPFE
cioc3
ON-CHIP
VOLTAGE
REFERENCE
CIRCUITS
Figure 3. CSP1027 Block Diagram
PORCAP
PORB
RSTB
cccc
iiii
oooo
cccc
3210
INTERNAL RESET
POWER-ON
RESET
TSTPOR
cioc3
5-7559 (F)
Lucent Technologies Inc.
5