ML6460CS 查看數據表（PDF） - Micro Linear Corporation
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ML6460CS Datasheet PDF : 30 Pages
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ML6460
FUNCTIONAL DESCRIPTION (Continued)
PRESET PIN CONTROL
The ML6460 can be controlled by a pair of preset mode
pins. These pins do not allow access to all of the
programmable features of the ML6460, but are intended
to provide a simpler interface for most applications. Refer
to Table 8 for preset modes.
SERIAL BUS OPERATION
The serial bus control in the ML6460 has two levels of
addressing: Device Addressing and Functional Addressing.
Device Addressing: Figures 15, 16, and 17 show the
physical waveforms generated in order to address the
ML6460. There are six basic parts of the waveform:
1. Start Indication: Clock Cycle 0
2. Device Address Shifted in: Clock Cycle 1 through 8
3. Device Address Strobed and Decoded: Clock Cycle 9
4. Function Address Shifted in: Clock Cycle 10 through 17
5. Function Address Strobed and Decoded: Clock Cycle 18
6. Data Shifted in 8 bits at a time, MSB first: Clock
Cycle 19 through 26
7. Data Shifted: Clock Cycle 27
8. Repeat strep 6 & 7 until all data is clocked in.
9. Stop indication: After Last Clock Cycle
(54 for CC, 54 for CNTR)
Note: data at SDATA is ignored at steps 3, 5, and 7.
Device & Function Addressing: Figures 15, 16, an17
show the register address procedure of the ML6460.
Device Address (8 bit)
1011 0100 (Hex = B4)
Function Address (8 bit)
Closed Caption Data Registers (CC): 0000 0000 (Hex = 00)
Macrovision Control Registers (CPC): confidential
Macrovision Data Registers (CPS): confidential
Control Registers (CNTR): 0000 0011 (Hex = 03)
Number of Data Bits
Closed Caption Data Registers (CC): 4 x 8 bits
Macrovision Control Registers (CPC): confidential
Macrovision Data Registers (CPS): confidential
Control Registers (CNTR): 4 x 8 bits
CONTROL REGISTER DEFAULT SETTINGS
At Power up, the ML6460 default settings are as follows:
• Control Register is undefined when the serial
bus mode is enabled.
• Macrovision Register is automatically
configured by the Macrovision default
values.
• Chip is ready to process video
• Preset Pins are available and if used will
configure the control register.
• Must write logic “0” (zero) to A30 to get
video
To get black at power up will require logic “1” in A30.
MODE PRESET1 PRESET0 CC
CNTR
CPC
CPS
A
0
0
XX XXXXXXXX
*
*
B
0
1
XX 09080209
*
*
C
1
0
XX 1C080209
*
*
D
1
1
XX 11080209
*
*
X = don't care
* = confidential information
Mode Description
Mode A: All register contents are programmed through serial interface.
Mode B: Master mode, CCIR656 rate, analog blanking.
Mode C: Slave mode, SAV and EAV codes, CCIR656 rate, digital blanking.
Mode D: Slave mode, external sync at start of line, Square pixel rate, analog blanking
Table 8. Preset Modes and Register Values
24
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