YGV629 Datasheet, PDF (9/26 Pages) YAMAHA CORPORATION – VC1 Video Controller 1

YGV629









■ Pins Functions
A 3.3V supply voltage is supplied to VC1. Therefore, the interface between peripheral circuits uses
LVCMOS (3.3V) for input/output. However, input pins, input/output pins, tri-state output pins, and an
open-drain pin except XIN, XOUT, and the analog pins can interface with the 5V TTL level compatible device
because they have 5V voltage tolerance.
Use the independent resistors for each pin, when pulling up or down the input pin and the input output pin
externally. However, the common resistor can be used between the input pins when pulling up or down the
input signal to the input pin. And, when pulling down the tolerant pin, connect to the ground level, through a
resistor with 7kЊ or lower.
■ Power Supply
VC1 needs a 3.3V single power supply. There is a dedicated analog power supply pin for the built-in PLL
and DAC as well as the digital power supply pin.
There is no restriction for the procedure to turn on the power supplies. Please power on or power off the
power supplies so that the time difference from the first power supply to the last one becomes within 1 second.
z VDD (Power supply
Pin No.14, 26, 41, 55, 71, 82, 92, 109, 118, 126, 140)
z VSS (Power supply
Pin No.13, 27, 40, 48, 56, 63, 72, 81, 91, 110, 117, 125, 133, 143)
Power supply pins for the internal digital circuit.
Supply 3.3V to the VDD pin, and supply the ground level to the VSS pin.
z PLLVDD (Power supply
Pin No.1)
z PLLVSS (Power supply
Pin No.3)
Analog Power supply pin for the built-in PLL
Supply 3.3V to the PLLVDD pin, and supply the ground level to the PLLVSS pin.
z AVDD (Power supply
Pin No.102)
z AVSS (Power supply
Pin No.107)
Analog Power supply pin for the built-in DAC
■ System Reset
VC1 must be reset in the power-on.
z RESET_N (Schmitt trigger input
Pin No.39)
Reset pin. Input the power-on-reset signal. The reset signal with the given time must be input after the
power-on.
The pin is low active. The pin uses a schmitt trigger type buffer.
-9-
4GV629A50