ptn3700 NXP Semiconductors, ptn3700 Datasheet - Page 19

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

NXP Semiconductors
Table 12.
[1]
[2]
PTN3700_1
Product data sheet
XSD
H
H
H
H
H
L
YYY
YYY
n
0
= current valid pixel data is output to the parallel interface.
= most recent valid pixel data is output to the parallel interface.
X or floating
Parity decoding function table - Receiver mode
stopped
running
running
running
running
Clock
7.7 Frame Mixing and Advanced Frame Mixing
When PTN3700 is configured as Receiver (TX/RX = LOW), the CMOS input FM selects
whether the Frame Mixing function is turned on (FM = HIGH) or off (FM = LOW). (When
PTN3700 is configured as Transmitter (TX/RX = HIGH), the Frame Mixing function is not
available, and the FM input should not be used.)
Advanced Frame Mixing is a proprietary pixel mapping algorithm that features the ability
to render full 24-bit color resolution (provided 24-bit source data is input) using an 18-bit or
an 18-bit plus display.
When Frame Mixing is off, the full 24-bit data path is maintained unaltered for the link
(transparent).
When Frame Mixing is enabled, the algorithm maps the incoming 24-bit data to the 18-bit
output data, aligned to the MSB. This is illustrated in
(R[7:2]
Frame Mixing algorithm from the original data. One additional ‘Advanced Frame Mixing’
bit is encoded into the next lower significant bit (R1
data.
Table 13.
When using Frame Mixing with normal 18-bit displays, the 6 MSBs of the parallel video
data outputs (R[7:2], G[7:2] and B[7:2]) should be connected to the display driver inputs.
When using special ‘18-bit plus’ display drivers (Advanced Frame Mixing capable),
additionally the next lower significant bit (R1, G1 and B1) should be connected to the
corresponding display driver input.
Bit
Input data
Output data
(R[7:0], G[7:0], B[7:0], HS, VS, DE)
Inputs
FM
of bits received in frame = H
, G[7:2]
Advanced Frame Mixing bit mapping (FM = HIGH)
X or floating
X or floating
G7
R7
B7
G7
R7
B7
FM
7
FM
FM
FM
even
even
odd
odd
and B[7:2]
Rev. 01 — 14 August 2007
G6
R6
B6
G6
R6
B6
6
FM
FM
FM
FM
) contain the altered information as calculated by the
G5
R5
B5
G5
R5
B5
5
FM
FM
FM
Received
parity bit
1.8 V simple mobile interface link bridge IC
G4
R4
B4
G4
R4
B4
CP
4
H
H
X
X
L
L
FM
FM
FM
AFM
Table
G3
R3
B3
, G1
G3
R3
B3
3
output
Parity
FM
FM
FM
CPO
H
H
L
L
L
L
13. The new 18-bit data fields
AFM
and B1
G2
R2
B3
G2
R2
B2
2
FM
FM
FM
R[7:0], G[7:0], B[7:0],
RGB
RGB
RGB
RGB
HS, VS, DE
AFM
PTN3700
Data outputs
© NXP B.V. 2007. All rights reserved.
n
n
0
0
, HS
R1
G1
, HS
, HS
, HS
undefined
undefined
B1
G1
) of the output
R1
B1
1
AFM
AFM
AFM
n
n
0
0
, VSn, DEn
, VS
, VS
, VS
[1][2]
n
0
0
, DE
, DE
, DE
HIGH
HIGH
HIGH
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G0
R0
B0
0
n
0
0