cbtl12131 NXP Semiconductors, cbtl12131 Datasheet - Page 2

• Manufacturer Part Number: cbtl12131
• Description: Cbtl12131 Displayport Multiplexer For Bidirectional Video In All-in-one Computer Systems
• Manufacturer: NXP Semiconductors

NXP Semiconductors
2. Features and benefits
CBTL12131
Product data sheet
2.1 High-speed DisplayPort Main Link multiplexing
2.2 DDC and AUX multiplexing
2.3 HPD channel management
2.4 Link state detection, configuration and reporting
TFBGA64 package with 0.5 mm ball pitch; owing to its high level of integration and
versatility, it is eminently suitable for use in computers employing bidirectional DisplayPort
video.
Switch path topologies supporting:
Supports DisplayPort v1.1a at 2.7 Gbit/s
High-bandwidth analog pass-gate technology
Configurable equalization in ‘external source’ mode path
Pre-emphasis level control for equalizer in ‘external source’ mode path
Very low intra-pair differential skew of < 5 ps
Very low inter-pair skew of < 180 ps
Switch path topologies supporting:
‘AC coupling bypass’ mode on Port A (for external ++DP sink)
Supports DisplayPort v1.1a AUX channel
Supports DDC/I
High-bandwidth analog pass-gate technology
Active logic management of HPD signals
Bidirectional HPD I/O for external connector (Port B)
HPD input for integrated DisplayPort display (Port D)
Two HPD outputs to both GPUs, one for internal (Port C) and one for external video
(Port A)
5 V tolerance on all HPD inputs
3.3 V LVTTL logic output levels for all HPD outputs
Internal 200 kΩ pull-down resistor on Port B and Port D HPD input ensures default
LOW when no sink is connected
Detection of DC state of AUX_P and AUX_N lines of external display (Port B)
Filtering of HPD interrupt pulse from external display (Port B)
Reporting of detected/filtered Port B AUX and HPD states via CMOS outputs (to
external system controller)
AUX channel bias control inputs for Port B to allow configuration as source or sink
‘dual through’ mode (two GPUs to two displays simultaneously)
‘external source’ mode (external source to internal display)
‘dual through’ mode (two GPUs to two displays)
‘external source’ mode (external source to internal display)
All information provided in this document is subject to legal disclaimers.
2
C-bus multiplexing
Rev. 1 — 25 February 2011
DisplayPort multiplexer for bidirectional video
CBTL12131
© NXP B.V. 2011. All rights reserved.
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