TDA4841PS Datasheet, PDF (35/60 Pages) NXP Semiconductors – I2C-bus autosync deflection controller for PC monitors

Philips Semiconductors
I²C-bus autosync deflection controller for
PC monitors
Product specification
TDA4841PS
List of I²C-bus controlled switches
I²C-bus data can be transmitted in direct or buffered mode and is defined by the MSB of the register subaddress:
• SAD1 is the register subaddress to be used for transmissions in direct mode
• SAD2 is the register subaddress to be used for transmissions in buffered mode.
Table 5 Controlled switches; notes 1 and 2
CONTROL
BIT
FUNCTION
SAD1 SAD2
REGISTER ASSIGNMENT
(HEX) (HEX) _{D7 D6 D5 D4 D3 D2 D1 D0}
BLKDIS
0: vertical, protection and horizontal unlock
0A
blanking available on pins CLBL and HUNLOCK
8A X D6 # # # # # #
1: only vertical and protection blanking available
on pins CLBL and HUNLOCK
AGCDIS 0: AGC in vertical oscillator active
0B 8B # D6 # # # # # #
1: AGC in vertical oscillator inhibited
FHMULT
0: EW output independent of horizontal
frequency
0B 8B D7 # # # # # # #
1: EW output tracks with horizontal frequency
VSC
0: VLIN, HCORT and HCORB adjustments
enabled
02 82 X D6 # # # # # #
1: VLIN, HCORT and HCORB adjustments
forced to centre value
MOD
0: horizontal and vertical moire cancellation
enabled
08 88 D7 # # # # # # #
1: horizontal and vertical moire cancellation
disabled
VOVSCN 0: vertical size 100%
0F 8F X D6 # # # # # #
1: vertical size 116.8% for VGA350
CLAMP 0: trailing edge for horizontal clamp
09 89 # D6 # # # # # #
1: leading edge for horizontal clamp
VBLK
ACD
0: vertical blanking = 260 µs
1: vertical blanking = 340 µs
0: ASCOR disconnected from PLL2
09 89 D7 # # # # # # #
04 84 X D6 # # # # # #
1: ASCOR internally connected with PLL2
STDBY⁽³⁾ 0: internal power supply enabled
1A 9A # X X X X X # D0
1: internal power supply disabled
SOFTST⁽³⁾ 0: soft start not released (pin HPLL2 pulled to
ground)
1A 9A # X X X X X D1 #
1: soft start is released (power-up via pin HPLL2)
Notes
1. X = don’t care.
2. # = this bit is occupied by another function. If the register is addressed, the bit values for both functions must be
transferred.
3. Bits STDBY and SOFTST can be reset by the internal protection circuit.
1999 Oct 25
35