
FUJITSU LIMITED
PRELIMINARY and CONFIDENTIAL
MB86277 MINT
Graphics Controller
33
Specifications Rev. 1.0
2.3.2 Video output interface
Table 2-2
Video Output Interface Pins
Pin name
I/O
Description
DCLKO
Output
Dot clock signal for display
DCLKI
Input
Dot clock signal input
HSYNC
I/O
Horizontal sync signal output
Horizontal sync input <in external sync mode>
VSYNC
I/O
Vertical sync signal output
Vertical sync input <in external sync mode>
CSYNC
Output
Composite sync signal output
DISPE
Output
Display enable period signal
GV
Output
Graphics/video switch
R7-0
Output
Digital picture (R) output. These signals are multiplexed
MD53-MD46. These pins are available when XRGEN = 0.
G7-0
Output
Digital picture (G) output. These signals are multiplexed
MD45-MD38. These pins are available when XRGEN = 0.
B7-0
Output
Digital picture (B) output. These signals are multiplexed
MD37-MD32 and MDQM7-6. These pins are available when
XRGEN = 0.
XRGBEN
Input
Signal to switch between RGB1-0 output, capture singnals
/memory bus (MD 63-MD32,MDQM7,6)
AOUTR
Analog Output
Analog Signal (R) output
AOUTG
Analog Output
Analog Signal (G) output
AOUTB
Analog Output
Analog Signal (B) output
ACOMPR
Analog
Analog (R) Compensation output
ACOMPG
Analog
Analog (G) Compensation output
ACOMPB
Analog
Analog (B) Compensation output
VREF
Analog
Analog Volatage Reference input
VRO
Analog
Analog Reference Current output
It is possible to output digital RGB, when XRGBEN = 0.(Memory bus=32bit)
Additional setting of external circuits can generate composite video signal.
Synchronous to external video signal display can be performed.
Either mode which is synchronous to DCLKI signal or one which is synchronous to dot clock, as for
normal display can be selected.
Since HSYNC and VSYNC signals are set to input state after reset, these signals must be pulled up LSI
externally.
The GV signal switches graphics and video at chroma key operation.
When video is selected, the “Low”
level is output.
AOUTR, AOUTG and AOUTB must be terminated at 75 ohm.
1.1-V is input to VREF. A bypass capacitor( with good high-frequency characteristics) must be inserted
between VREF and AVS.
ACOMPR, ACOMPG and ACOMPB are tied to analog VDD via 0.1uF ceremic capacitors.
VRO must be pulled down to analog ground by a 2.7 k ohm resister.
When not using DAC, it is possible to connect all of analog pins(AVD, AOUTR,G,B, ACOMPR,G,B, VREF,
VRO) to GND.