ptn3700 NXP Semiconductors, ptn3700 Datasheet - Page 17

• Manufacturer Part Number: ptn3700
• Description: 1.8 V Simple Mobile Interface Link Bridge Ic
• Manufacturer: NXP Semiconductors

NXP Semiconductors
3.
PTN3700_1
Product data sheet
The PTN3700 clock detection circuit identifies the clock as inactive when the PCLK input signal frequency is less than 500 kHz.
7.5 Power modes
The PTN3700 has three different power modes to minimize power consumption of the link
as a function of link activity: Shutdown mode, Standby mode, and Active mode. The truth
table for the three power modes is shown in
Table 9.
Inputs
XSD
L
H
H
Fig 18. Typical video screen
•
•
•
Shutdown mode: By driving input pin XSD LOW, the PTN3700 assumes lowest
power mode. All internal logic circuits are reset during this mode, and the link is
completely inactive. The transmitter high-speed serial output channels are put in
high-impedance state, and the receiver high-speed serial input channels are pulled
LOW. The receiver CMOS parallel outputs will all be set HIGH with the exception of
DE and PCLK which are reset LOW. However, the input buffers for the transmitter
remain active, so it is recommended to stop PCLK and RGB data to achieve the
lowest Shutdown mode power.
Standby mode: When pin XSD is set HIGH but no input clock is active, the PTN3700
detects inactivity of the clock
active input clock is detected. The transmitter serial outputs, receiver serial inputs and
receiver parallel outputs all behave identically to their respective states in Shutdown
mode.
Active mode: When pin XSD is set HIGH and an active input clock is detected,
PTN3700 will assume normal link operation. Current consumption depends on the
PCLK frequency, number of lanes, FSS/PSS mode, data pattern, etc.
3 numbers correspond to [DE, HS, VS]
Power modes - Transmitter mode
PCLK
X
stopped
running
Rev. 01 — 14 August 2007
HS = 0
000
001
001
001
Power mode
Shutdown
Standby
Active
010
011
011
011
3
and remains in a low-power Standby mode until an
active video
HS = 1
010
011
111
011
1.8 V simple mobile interface link bridge IC
Outputs
D0+, D0 , D1+, D1 , D2+, D2
high-Z
high-Z
active serial data
Table 9
002aac803
and
010
011
011
011
Table
VS = 1
VS = 0
10.
PTN3700
© NXP B.V. 2007. All rights reserved.
CLK+, CLK
high-Z
high-Z
active
17 of 41