HB7121B Datasheet, PDF (13/29 Pages) Hynix Semiconductor – CMOS IMAGE SENSOR With 8-bit ADC

Semiconductor Inc.
System IC SBU
(3) Mode C Register (Address 02h, default : 08h, R/W)
HB7121B
CMOS IMAGE SENSOR
With 8-bit ADC
This register controls power down and color select.
n Mode C[3] : sw_enb (software enable : active low)
(400*300 CMOS image sensor only) <default value : 1b>
This bit is only exist in 400*300 CMOS image sensor chip to enable image sensor operation
by software. This bit has same function as ENB pin control.
It’s very useful for the applications that is needed want to reduce interface pin count to
CMOS image sensor. In that case, cannot ENB pin to VDD line and control the sensor using
this bit.
n Mode C[2] : pwr_dn(A/D converter power down) <default value : 0b>
This bit controls power down of A/D converter when sleep mode(idle state) is set by ENB pin
is low or sw_enb(Mode C[3]) is high. When set to high, A/D converter is turned on whenever
ENB is low or sw_enb is high. When set to low, A/D converter is turned off always regardless
ENB pin state or sw_enb state . But digital block goes to power down mode always when
ENB is low regardless this bit.
n Mode C[1] : color(color select) <default value : 0b>
This bit selects color mode or monochrome mode. Default value means color image sensor
and all three ADCs are used for Bayer RGB color pattern respectively, then RGB gains are
controlled independently. But when set this to one, i.e. monochrome mode, just single ADC is
used for all pixels regardless RGB color.
At the monochrome mode all pixels are controlled by ‘G’ gain only. ‘R’ and ‘B’ gain are not
used. In case of monochrome image sensor, this bit should be set to ‘1’ get the good image
and to simplify the sensor control.
(4) Row start address Register
(Higher byte : Address 10h, default : 00h, R/W)
(Lower byte : Address 11h, default : 06h, R/W)
Define window start position row start address of display window. Should be programmed with
value between 6 and 306.
This document is a general product description and is subject to change without notice. Hynix Semiconductor does not assume
any responsibility for use of circuits described. NO patent licenses are implied.
DA21000601R_1.0
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2001 Hnix System IC SBU