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Description
A/V MUX Board
IC7503
TDA1305T: Bitstream continuous calibration DAC
Function Overview
The TDA1305T is a dual CMOS DAC with upsampling filter and noise
shaper. The combination of high oversampling up to 16-fold, 2nd order
noise shaping and continuous calibration conversion ensures that only
simple 1st order analog post-filtering is required.
Two on board operational amplifiers convert the digital-to analog
current to an output voltage. Externally connected capacitors perform
the required 1st order filtering so that no further post-filtering is
required.
10
9
14
15
7503
VDDD
VSSD
VDDX
VSSX
VSSO
TDA1305T
6
DATA
SERIAL
DAC
4
BCK
DATA
INPUT
5
WS
3
TEST1
11
TEST2
TIMING
7
8
12
13
Pin
Name
I/O Function
1
VDDA
-
Positive supply voltage (analog part)
2
VSSA
-
supply ground (analog part)
3
TEST1
I
test input (connected to ground)
4
BCK
I
bit clock input
5
WS
I
word select input
6
DATA
I
data input
7
CKSL1
I
clock selection 1
8
CKSL2
I
clock selection 2
9
VSSD
-
supply ground (digital part)
10
VDDD
-
Positive supply voltage (digital part)
11
TEST2
I
test input (connected to ground)
12
SYSCLK
I
system clock
13
RES
-
not connected
14
VDDX
-
Positive supply voltage
15
VSSX
-
supply ground
16
CDEC
O
system clock output
17
DEEM1
I
deemphasis on/off
18
DEEM2
I
deemphasis on/off
19
MUSB
I
muting (active low)
20
DSMB
I
double speed mode
21
ATSB
I
12 dB attenuation
22
VOL
O
left channel output
23
FILTCL
I
capacitor for left channel 1st order filter
24
FILTCR
I
capacitor for right channel 1st order filter
25
VOR
O
right channel output
26
VREF
O
internal reference voltage for output channels (VDD/2)
27
VSSO
-
supply ground (operational amplifier)
28
VDDO
-
positive supply voltage (operational amplifier)
2 - 10
27
28
1
2
FILTCL
VDDO
VDDA
VSSA
LEFT
-
VOL
OUTPUT
STAGE
+
FILTCR
RIGHT
OUTPUT
STAGE
-
VOR
+
16
17
18
19
20
21
26
Digital Board
IC7200
DVD Decoder with Host Processor
DMA CHANNELS
ARBITOR
FRONT-END
INTERFACE
(SECTOR
PROCESSOR
& DVD
DECRYPTION)
23
2K
INSTRUC.
22
CACHE
2K DATA
24
CACHE AND
2K SRAM
25
OS LINK 2 UART
1 I
C
2
PIO
3 PWM
SMART CARD
DIAGNOSTICS
CONTROLLER
AND SYSTEM
SERVICES
• Integrated 32-bit Risc Host CPU
- 2kBytes Instruction Cache, 2kBytes Data Cache/SRAM
- 50k Dhrystones/sec (2.1) - 50MHz
• Video Decoder
- fully supports MPEG-2 MP@ML
- memory reduction - PAL in 12MBits
• Subpicture Decoder
• High performance on-screen display
• Audio Decoder
- 5.1 channel dolby AC-3® / multi channel MPEG-2 decoding
- downmix to stereo or to dolby pro-logic compatible outputs for
MPEG-2 and AC-3
- IEC6958 - IEC61937 compatible output
- LPCM (DVD) mode supported
- 6 channels output
• PAL/NTSC encoder
- Macrovision™ 7.01/6.1 compatible
- Teletext, and closed caption
• High performance SDRAM interface
• Programmable memory interface for DRAM, ROM, peripherals etc.
• Front-end channel IC interface
- DVD, VCD and CD-DA compatible
- DSS - DVB bitstreams
- serial and parallel interfaces
- hardware sector filtering
- integrated CSS decryption and track buffer
• Integrated peripherals
- 2 UARTS, 1 I
C controller, 3 PWM outputs, 3 Timers, 3 Capture
2
Timers, Smart Card
- 34 bits of programmable I/O
- OS link
• Professional toolset support
- ansi C compiler and libraries
- operating systems support
- advanced debugging tools
• Description
The STi5505 provides a very highly integrated back-end solution for
DVD and combo DVD-DVB (SetTop Box) applications. It incorporates
a host CPU which handles both general application (DVD navigation,
CD-DA, VCD, DVB) and drivers of the different embedded periphals
(audio/video, subpicture decoders, OSD, PAL/NTSC encoder...).
GDV 100 D/002
EXTERNAL
MEMORY
INTERFACE
MPEG2/AC3
AUDIO
5.1 CHANNEL
MPEG2 VIDEO
SUBPICTURE
OSD
PAL/NTSC
TELETEXT
INTERFACE
GRUNDIG Service
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