STV2246 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
STV2246 Datasheet PDF : 86 Pages
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STV224X, STV228X, STV223X - I²C BUS SPECIFICATION COMPATIBILITY
7 I²C BUS SPECIFICATION COMPATIBILITY
The STV2246H/36H, 2286H, 2247H/37H, 2248H/
38H and 2249H/39H I²C bus specification is com-
patible between IC version. However, some dedi-
cated settings must be used for the different ver-
sions. The following sections show the differences
between the various versions. An “X” means that
the function is available and can be set to “1” or
“0”.
2248H/38H 2249H/39H 2247H/37H 2246H/36H 2286H
RGBext
WR0A d7:6
X
X
X
X
011
L/L' mode
WR01 d5
X
0
0
0
0
Positive/Negative Modulation
WR01 d4
X
0
0
0
0
FM/AM Output Selection
WR04 d5
X
0
) Bell Filter
t(s WR11 d4:0
X
X
QSS/Intercarrier Application
c WR06 d6
X
X
u QSS and AM defeat
d WR04 d6
X
X
ro AGC SIF Time Constant
WR06 d3 & WR1E d4
X
X
P CVBSout amplitude
WR02 d4:0
X
X
te Note 1: The FBEXT pin must be connected to ground.
0
00000
X
X
X
X
0
00000
1
1
X
X
0
00000
1
1
00
10000
sole CAUTION: The specification of WR04 d3:2 has changed.
b For 224XC versions (refer to STV224XC datasheet), WR04 d3:2 = 11 (bin.) means that FM demod de-
emphasis is bypassed. This function is used for BTSC application compatibility.
O For 224XD/XE versions, WR04 d3:2 = 11: NOT TO BE USED.
) - For 224XH versions, WR04 d3:2 = 11 (bin.) means that Audio FM Wide mode is selected and it must be
used in QSS applications only. In this case, the following registers must be programmed:
t(s WR04 d3:2 = 11 (bin.) (Audio FM Wide mode)
c WR06 d6 = 0 (QSS application)
u WR1F d5:4 = 1x (bin.) (AVL ON)
rod CAUTION: The specification of WR07 d6 has changed.
P For 224XC/224XD versions, WR07 d6 = 1 means “insertion of cut-off pulses after a vertical oversize
blanking”
te For 224XE/XH versions, WR07 d6 = 1 means “RGB peak limitation”
oleCAUTION: The specification of WR0F d5 has changed.
bs The new specification is:
WR0F d5 = 0: trap and luma delay active; this is not changed
WR0F d5 = 1: trap and luma delay disabled (bypass); this is changed
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