YGV638 Datasheet, PDF (6/26 Pages) YAMAHA CORPORATION – a pattern graphic controller with an on-chip VRAM and the ample drawing performance enables high-resolution animated GUIs on WVGA display panels.

■ Pin Attributes
YGV638
Monitor Interface (34)
DRO7-0
8
DGO7-0
8
DBO7-0
8
VSYNC_N
1
HCSYNC_N
1
BLANK_N
1
STARTH
1
LOADH
1
CLKV
1
STARTV
1
POL
1
OUTENV
1
DOTCLK
1
O Digital video: R output
O Digital video: G output
O Digital video: B output
OT Vertical sync signal output (dual-purpose pin)
Horizontal sync signal or composite sync signal output
OT
(dual-purpose pin)
OT Display timing output (dual-purpose pin)
OT Horizontal start signal output
OT Horizontal load signal output
OT Vertical clock output (dual-purpose pin)
OT Vertical start signal output (dual-purpose pin)
OT Polarity reverse output (dual-purpose pin)
OT Output enable signal for a gate driver output
O Dot clock output
Tolerant
Tolerant
Tolerant
Tolerant
Tolerant
Tolerant
Tolerant
Tolerant
Tolerant
4mA
4mA
4mA
4mA
4mA
4mA
4mA
4mA
4mA
4mA
4mA
4mA
4mA
Clock & Reset (8)
XIN
1
I Reference clock input
XOUT
1
O Crystal connection
DTCKIN
1
I Dot clock input
PLLCTL3-0
4
I PLL control
RESET_N
1
I$ Reset
Tolerant
Tolerant
for device (56)
XTEST2-0
VDD33
VSS
PLLVDD
PLLVSS
APLLVDD
APLLVSS
AVDD33
AVDD18
AVSS
VDD18
VSS18
3
I Test pin
17 － Digital I/O power supply
19 － Digital I/O VSS
1
－ Power supply for system clock generation PLL
1
－ VSS for system clock generation PLL
1
－ Power supply for analog RGB clock generation PLL
1
－ VSS for analog RGB clock generation PLL
1
－ Power supply for Analog Front End
2
－ Power supply for Analog Front End
2
－ VSS for Analog Front End
4
－ Power supply for digital core
4
－ VSS for digital core
others (1)
NC
1
－ No connection pin
Total number of pins: 239 pin - 31 dual-purpose pin = 208 pins
[Description of I/O]
I: Input
O: Output
I$: Input with Schmitt trigger
OT: 3-state output
I/O: Input and Output
OD: Open-drain output
[Description of attribute]
Tolerant: An attribute of an input pin buffer and a bidirectional pin buffer, or the output pin buffer.
During high impedance states, current will not flow into power supply pins from a pin
when some voltage higher than the I/O supply voltage is applied to the pin, if the pin is
“Tolerant.”
Analog: Attribute which indicates an analog pin. These pins are operated from AVDD33 power
supply.
4GV638A21
6