LM1236 National Semiconductor Corporation, LM1236 Datasheet - Page 28

• Manufacturer Part Number: LM1236
• Description: 150 Mhz I2c Compatible Rgb Preamplifier With Internal 254 Character Osd Rom, 512 Character Ram And 4 Dacs
• Manufacturer: National Semiconductor Corporation

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Register
BBHLCTRLB1
BBLLCTRLB0
BBLLCTRLB1
CHSDWCTRLB0
CHSDWCTRLB1
ROMSIGCTRL
ROMSIGDATAB0
ROMSIGDATAB1
HSTRT1
VSTRT1
W1STRTADRL
W1STRTADRH
COLWIDTH1B0
COLWIDTH1B1
COLWIDTH1B2
COLWIDTH1B3
HSTRT2
VSTRT2
W2STRTADRL
W2STRTADRH
COLWIDTH2B0
COLWIDTH2B1
COLWIDTH2B2
COLWIDTH2B3
Any registers in the range of 0x8420 - 0x8428 are for National Semiconductor internal use only and should not be written to under
application conditions.
FADE_INTVL
Register
BGAINCTRL
GGAINCTRL
RGAINCTRL
CONTRCTRL
DAC1CTRL
DAC2CTRL
DAC3CTRL
DAC4CTRL
DACOSDDCOFF
GLOBALCTRL
AUXCTRL
PLLFREQRNG
SRTSTCTRL
LM1236 Address Map
PREAMPLIFIER CONTROL
These registers, shown in Table 12 , control the gains, DAC outputs, PLL, horizontal and vertical blanking, OSD contrast and DC
offset of the video outputs. Additional register detail is provided in the Control Register Definitions Section , later in this document.
Address
Address
0x840A
0x840D
0x840E
0x841A
0x841B
0x841C
0x841D
0x841E
0x843A
0x843E
0x8406
0x8407
0x8408
0x8409
0x840F
0x8410
0x8412
0x8413
0x8414
0x8415
0x8416
0x8417
0x8418
0x8419
0x841F
0x8429
0x8430
0x8431
0x8432
0x8433
0x8434
0x8435
0x8436
0x8437
0x8438
0x8439
0x843F
0x8411
Default
Default
0x5B
0x01
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x62
0x32
0x00
0x00
0x00
0x00
0x00
0x00
0x56
0x00
0x01
0x00
0x00
0x00
0x00
0x35
0x60
0x60
0x60
0x60
0x80
0x80
0x80
0x80
0x14
0x02
0x03
0x06
0x00
TABLE 11. OSD Control Register Detail (Continued)
TABLE 12. LM1236 Preamplifier Interface Registers
(Continued)
D7
D7
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
B[1:0]
B[1:0]
AUTO
PLL_
AID
D6
D6
V_INTVL[3:0]
X
X
X
X
X
X
X
DCF[1:0]
28
CLMP
D5
D5
HB_POS[3:0]
X
X
X
X
X
X
X
X
G[2:0]
G[2:0]
OSD CONT[1:0]
D4
D4
X
X
X
X
X
X
X
X
COL[23:16]
COL[31:24]
COL[23:16]
COL[31:24]
HPOS[7:0]
VPOS[7:0]
ADDR[7:0]
HPOS[7:0]
VPOS[7:0]
ADDR[7:0]
CRC[15:8]
DAC1[7:0]
DAC2[7:0]
DAC3[7:0]
DAC4[7:0]
COL[15:8]
COL[15:8]
CRC[7:0]
COL[7:0]
COL[7:0]
CONTRAST[6:0]
X
GGAIN[6:0]
RGAIN[6:0]
BGAIN[6:0]
OOR
D3
D3
X
X
X
X
X
X
X
HBPOS
_EN
VBL
H_INVTVL[3:0]
D2
D2
X
X
X
X
X
X
X
X
DC OFFSET[2:0]
R[2:0]
R[2:0]
RSV
PS
D1
D1
X
X
X
X
X
X
X
PFR[1:0]
ADDR[8]
ADDR[8]
SRST
CRS
HBD
B[2]
B[2]
B[2]
BV
D0
D0