BSP3505D Micronas Intermetall GmbH, BSP3505D Datasheet - Page 5

• Manufacturer Part Number: BSP3505D
• Manufacturer: Micronas Intermetall GmbH

Micronas
PRELIMINARY DATA SHEET
2. Architecture of the BSP 3505D
Fig. 2–2 shows a simplified block diagram of the IC. Its
architecture is split into two main functional blocks:
1. DSP (digital signal processing) section performing
2. analog section containing two A/D-converters,
2.1. Analog Section and SCART Switching Facilities
The analog input and output sections include full matrix
switching facilities, which are shown in Fig. 2–1.
The switches are controlled by the ACB bits defined in
the audio processing interface (see section 4. Program-
ming the BSP 3505D).
2.1.1. Standby Mode
If the BSP 3505D is switched off by first pulling STAND-
BYQ low, and then disconnecting the 5 V, but keeping
the 8 V power supply (‘Standby’-mode), the switches
S1 and S2 (see Fig. 2–1) maintain their position and
function. This facilitates the copying from selected
SCART-inputs to SCART-output in the TV-set’s standby
mode.
In case of power-on start or starting from standby, the IC
switches automatically to the default configuration,
shown in Fig. 2–1. This action takes place after the first
I
ACB register first, the individual default setting mode of
the TV set can be defined.
Fig. 2–2: Architecture of the BSP 3505D
SCART1
SCART2
Mono
2
C transmission into the DSP part. By transmitting the
audio baseband processing
four D/A-converters, and SCART-switching facilities.
MONO_IN
SC1_IN_L
SC1_IN_R
SC2_IN_L
SC2_IN_R
XTAL_IN
Clock
XTAL_OUT
A/D
A/D
SCART Switching Facilities
SCARTL
SCARTR
DSP
LOUD-
SPEAKER L
LOUD-
SPEAKER R
SCART1_R
SCART1_L
Fig. 2–1: SCART-Switching Facilities (see 4.4.12.)
positions show the default configuration after Power
On Reset.
Note: SCART_OUT is undefined after RESET!
SC1_IN_L/R
SC2_IN_L/R
MONO_IN
SCART1_L/R
SCART_IN
from Audio Baseband
Processing (DSP_OUT)
intern. Sig-
nal Lines
Pins
D/A
D/A
D/A
D/A
D
A
BSP 3505D
D_CTR_OUT0/1
DACM_L
DACM_R
SC1_OUT_L
SC1_OUT_R
Loudspeaker
SCART
S1
S2
to Audio Baseband
Processing (DSP_IN)
A
SC1_OUT_L/R
SCART_OUT
D
SCARTL/R
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