CS7654 查看數據表（PDF） - Cirrus Logic
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CS7654 Datasheet PDF : 62 Pages
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CS7654
I2CBUSY
INITACT
HIZENB
P4BYTE
Logic high indicates that the CS7654 secondary I2C master is busy accessing the addressed
slave device.
Logic high indicates the CS7654 master is busy initializing registers from the external I2C
EEPROM on the secondary I2C bus (if present).
Pin 44 status.
Pin 46 status.
PIN I/O Control (02h at SA 0x34h)
7
6
5
4
3
2
res
res
res
res
res
res
Reserved
Reserved
PLLOUT
Logic high enables the PLL clock output to the CS7615 (pin 51).
1
res
Reserved
0
PLLOUT
R/W
Digital Gain Register (03h at SA 0x34h)
7
6
5
res
res
res
Reserved
4
DG4
3
DG3
2
DG2
R/W
1
DG1
0
DG0
DG[0:4]
Controls the digital gain applied to the SVID_Y (Luminance) signal after the RGB to YCrCb con-
verter block. The range of gains are from 0 to 31/8 in increments of 1/8. A gain of 0, indicates
no brightness.
Scaler Control (04h at SA 0x34h)
7
6
res
res
Reserved
5
res
Reserved
4
res
Reserved
3
CUSTOM
R/W
2
MODE2
MODE[2:0]
CUSTOM
Selects 1 of 8 pre-defined scaling ratios.
When set, scaler uses custom values held in registers 2Dh-2Fh.
1
MODE1
R/W
0
MODE0
Feature Control Register (05h at SA 0x34h)
7
6
5
4
3
2
1
0
res
res
res
CHROFF
LUMOFF
GAMON
AWB
res
Reserved
R/W
R/W
R/W
R/W
Reserved
AWB
The Automatic White Balance procedure is initiated by pointing to a white scene and setting this
bit high. The bit will return a logic high while the AWB procedure is in progress. Setting this bit
low will have no effect. This bit will always be read as a “0” when the AWB is not in progress.
GAMON
The gamma correction from the gamma ram look up table is applied to the video signal in R-G-
B space when this bit is set high. The gamma ram is a fully user programmable, 256 entry look
up table.
LUMOFF
Setting LUMOFF bit high disables the luma peaking filter.
CHROFF
Setting the CHROFF bit high disables the chroma low-pass filter for minimizing color aliasing.
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