MC44BS373CAEFR2 Freescale Semiconductor, MC44BS373CAEFR2 Datasheet - Page 22

• Manufacturer Part Number: MC44BS373CAEFR2
• Description: IC AUD/VID PAL MODULATOR 16-SOIC
• Manufacturer: Freescale Semiconductor

Specifications of MC44BS373CAEFR2

• Applications: *
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: MC44BS373CAEFR2TR

MC44BS373CA Modes of Operation
MC44BS373CA Modes of Operation
15 MC44BS373CA Modes of Operation
15.1 Power-On Settings
At power on, the MC44BS373CA is configured as shown in Table 25 below.
15.2 Power Supply
The three device V
must be applied at the same time to ensure all internal blocks are correctly biased. Do not bias any other pin
before V
When all V
15.3 Standby Mode
During standby mode, the modulator is switched to low power consumption. That is, the sound oscillator,
UHF oscillator, and the video and sound modulator sections’ bias are internally turned off. The I
section remains active.
The MC44BS373CA can be set to standby mode with a combination of 3 bits: OSC = 1, SO = 1, and ATT = 1.
15.4 System L or B / G Selection
The SYSL pin can be used to switch the device between system L and system B/G, as summarized in
Table 26.
C1-High order bits
C0-Low order bits
FM-High order bits
FL-Low order bits
Note:
N0 to N11 are set to have UHF oscillator on channel E36 (591.25 MHz). (See Section 15.7, “UHF PLL Section,” for
more information.) Peak white clip is on. Sound frequency is 5.5 MHz. Sound reference frequency is 31.25 kHz.
Logic output port is low voltage. Picture-to-sound ratio is 12 dB.
CC
WRITE MODE
CC
is applied to the MC44BS373CA.
1
Video modulation polarity
Video modulation depth (% typical)
Sound modulation
s are switched to 0 V, the SDA and SCL pins are high impedance.
See Section 12, “Video Characteristics.”
CC
pins (pins 10, 13 and 15 for SO16 package, pins 10, 15 and 17 for QFN20 package)
Function
Table 26. System L or B/G Selection
Bit 7
N5
1
0
0
Table 25. Power-On Settings
MC44BS373CA Data Sheet
Bit 6
N4
0
0
0
1
Bit 5
N11
N3
0
0
B/G (SYSL = 0)
Negative
Bit 4
N10
N2
FM
0
0
82
Bit 3
N9
N1
0
1
Bit 2
N8
N0
0
0
L (SYSL = 1)
Positive
AM
93
Bit 1
N7
0
0
0
Bit 0
N6
0
0
0
2
ACK
ACK
ACK
ACK
ACK
C bus