YGV638 Datasheet, PDF (5/26 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
■ Pin Attributes
Pin Name
Num. I/O Function
CPU Interface (22)
D7-0
8 I/O CPU data bus
PS2-0
3
I CPU port selection
CS_N
1
I Chip select (dual-purpose pin)
RD_N
1
I Read strobe (dual-purpose pin)
WR_N
1
I Write strobe (dual-purpose pin)
WAIT_N
1 OT CPU bus wait (dual-purpose pin)
READY_N
1 OT CPU bus ready
INT_N
1 OD Interrupt
SER_N
1
I CPU interface selection
SCS_N
1
I Serial interface chip select (dual-purpose pin)
SDIN
1
I Serial interface data input (dual-purpose pin)
SCLK
1
I Serial interface clocked into (dual-purpose pin)
SDOUT
1 OT Serial interface data output (dual-purpose pin)
Pattern Memory Interface (60)
MD31-0
32 I/O
MA25-1
25 OT
MOE_N
1 OT
MWE_N
1 OT
RAHZ_N
1
I
Pattern memory data bus
Pattern memory address bus
Pattern memory output enable
Pattern memory write pulse
Pattern memory high-impedance switching pin
Video Input (58)
ACIN1
ACIN2
ARIN
AGIN
ABIN
ATESTIN
VREF0
VREFP
VREFN
ADCKIN
ARCKIN
AVSIN_N
AHSIN_N
DRI7-2
DGI7-2
DBI7-2
DIN7-0
YIN7-0
CIN7-0
DVSIN_N
DHSIN_N
DGCKIN
1
I Analog composite video input
1
I Analog composite video input
1
I Analog video R input
1
I Analog video G input
1
I Analog video B input
1
I Test input
1
O ADC reference
1
O Plus reference voltage for ADC
1
O Minus reference voltage for ADC
1
I Analog video clock input
1
I Analog video clock input
1
I Analog video vertical sync signal input
1
I Analog video horizontal sync signal input
6
I Digital video R input (dual-purpose pin)
6
I Digital video G input (dual-purpose pin)
6
I Digital video B input (dual-purpose pin)
8
I Digital video 8bit YCrCb input (dual-purpose pin)
8
I Digital video Y input (dual-purpose pin)
8
I Digital video Cr/Cb input (dual-purpose pin)
1
I Digital video vertical sync signal input
1
I Digital video horizontal sync signal input
1
I Digital video clock input
Attribute
Drive
Tolerant
Tolerant
Tolerant
Tolerant
Tolerant
Tolerant
Tolerant
Tolerant
Tolerant
Tolerant
Tolerant
Tolerant
4mA
4mA
4mA
4mA
4mA
Tolerant
4mA
4mA
4mA
4mA
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Tolerant
Tolerant
Tolerant
Tolerant
Tolerant
Tolerant
Tolerant
Tolerant
Tolerant
Tolerant
Tolerant
Tolerant
Tolerant
4GV638A21
5