TC1920 Datasheet, PDF (40/78 Pages) Infineon Technologies AG – 32-Bit Single-Chip Microcontroller

TC1920
Preliminary
Codec Interface
The speech A/D and D/A converters (called codec) is designed for telephone and
speech recognition quality. They can be used for microphone / earpiece applications.
The TC1920 configuration implements a dual channel speech codec connected to the
FPI bus.
V_DD V_SS V_DD V_SS
COD0 COD0 COD1 COD1
C lo c k
f_per
C on trol
Address
Decoder
SR0
SR1
SR2
In te rr u p t
C on trol
SR3
SR4
SR5
V _REF
COD
V_GND
COD
CODEC
M odule
Kernel
ch0 non-inv. input
ch0 inv. input
ch0 non-inv. output
ch0 inv. output
ch1 non-inv. input
ch1 inv. input
ch1 non-inv. output
ch1 inv. output
clock disable
external clock input
mute channel 0
mute channel 1
5
Codec bypass
Figure 14 General Codec Overview
A I0 +
A I0 -
AO0+
AO0-
A I1 +
A I1 -
AO1+
AO1-
CO DEC_DIS
CEXT
MUTE0
MUTE1
IIS
s ig n a ls
General Purpose I/Os (GPIO)
• Push/pull output drivers
• 3.3 Volt operation for GPIO
• Programmable pull-up/-down devices at all pins
• Optional Open Drain Output Mode
Data Sheet
36
V 1.3, 2003-10