AR0542 Datasheet, PDF (29/81 Pages) ON Semiconductor – 5 Mp CMOS Digital Image Sensor

AR0542: 1/4-Inch CMOS Digital Image Sensor
Control of the Signal Interface
Table 10: Signal State During Reset
Pad Name
EXTCLK
XSHUTDOWN/RESET_BAR
LINE_VALID
FRAME_VALID
DOUT[9:0]
PIXCLK
SCLK
SDATA
FLASH
DATA0_P
DATA0_N
DATA1_P
DATA1_N
CLK_P
CLK_N
GPI[3:0]
TEST
Pad Type
Input
Input
Output
Output
Output
Output
Input
I/O
Output
Output
Output
Output
Output
Output
Output
Input
Input
Hardware Standby
Enabled. Must be driven to a valid logic level.
Enabled. Must be driven to a valid logic level.
Software Standby
High-Z. Can be left disconnected/floating.
Enabled. Must be pulled up or driven to a valid logic level.
Enabled as an input. Must be pulled up or driven to a valid logic level.
High-Z.
Logic 0.
MIPI: Ultra Low-Power State (ULPS), represented
as an LP-00 state on the wire (both wires at 0V).
Powered down. Can be left disconnected/floating.
Enabled. Must be driven to a logic 1 for a serial MIPI-configured sensor.
General Purpose Inputs
The AR0542 provides four general purpose inputs. After reset, the input pads associated
with these signals are powered down by default, allowing the pads to be left discon-
nected/floating.
The general purpose inputs are enabled by setting reset_register[8] (R0x301A). Once
enabled, all four inputs must be driven to valid logic levels by external signals. The state
of the general purpose inputs can be read through gpi_status[3:0] (R0x3026).
In addition, each of the following functions can be associated with none, one, or more of
the general purpose inputs so that the function can be directly controlled by a hardware
input:
• Output enable (see “Output Enable Control” on page 26)
• Trigger (see the sections below)
• Standby functions
• SADDR selection (see “Serial Register Interface” on page 24)
The gpi_status register is used to associate a function with a general purpose input.
AR0542_DS Rev. H Pub. 5/15 EN
29
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