ptn3360d NXP Semiconductors, ptn3360d Datasheet - Page 11

• Manufacturer Part Number: ptn3360d
• Description: Enhanced Performance Hdmi/dvi Level Shifter With Active Ddc Buffer, Supporting Deep Color Mode
• Manufacturer: NXP Semiconductors

NXP Semiconductors
PTN3360D_1
Product data sheet
7.1.1 Hot plug detect
7.1.2 Output Enable function (OE_N)
7.1.3 DDC channel enable function (DDC_EN)
7.1 Enable and disable features
PTN3360D offers different ways to enable or disable functionality, using the Output
Enable (OE_N), and DDC Enable (DDC_EN) inputs. Whenever the PTN3360D is
disabled, the device will be in Standby mode and power consumption will be minimal;
otherwise the PTN3360D will be in active mode and power consumption will be nominal.
These two inputs each affect the operation of PTN3360D differently: OE_N controls the
TMDS channels, DDC_EN affects only the DDC channel, and HPD_SINK does not affect
either of the channels. The following sections and truth table describe their detailed
operation.
The HPD channel of PTN3360D functions as a level-shifting buffer to pass the HPD logic
signal from the display sink device (via input HPD_SINK) on to the display source device
(via output HPD_SOURCE).
The output logic state of HPD_SOURCE output always follows the logic state of input
HPD_SINK, regardless of whether the device is in Active mode or Standby mode.
When input OE_N is asserted (active LOW), the IN_Dx and OUT_Dx signals are fully
functional. Input termination resistors are enabled and the internal bias circuits are turned
on.
When OE_N is de-asserted (inactive HIGH), the OUT_Dx outputs are in a
high-impedance state and drive zero output current. The IN_Dx input buffers are disabled
and IN_Dx termination is disabled. Power consumption is minimized.
Remark: Note that OE_N signal level has no influence on the HPD_SINK input,
HPD_SOURCE output, or the SCL and SDA level shifters. A transition from HIGH to LOW
at OE_N may disable the DDC channel for up to 20 μs.
The DDC_EN pin is active HIGH and can be used to isolate a badly behaved slave. When
DDC_EN is LOW, the DDC channel is turned off. The DDC_EN input should never
change state during an I
operation may hang the bus, while enabling DDC_EN during bus traffic would corrupt the
I
I
2
2
C-bus operation. Hence, DDC_EN should only be toggled while the bus is idle. (See
C-bus specification).
All information provided in this document is subject to legal disclaimers.
Rev. 01 — 16 June 2010
2
C-bus operation. Note that disabling DDC_EN during a bus
HDMI/DVI level shifter supporting deep color mode
PTN3360D
© NXP B.V. 2010. All rights reserved.
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