Signal Description
	Name I	Pin I Type I Description
	SCLK	128	I	Sound Clock. This signal can be used to clock the sound system, when a clock
			asynchronous to the video system is required. See Chapter 13.0 Sound.
	SDCLK	3	OS8	Serial Data Clock. When the sound system is in serial sound mode, this dock
			is output and validates serial data on its rising edge.
	SDO/MUTE	4	OS8	Serial Data Out / Mute. This pin has two functions depending on whether the
			sound mode is either analog VIDC10 compatible, or digital serial sound. In
			digital mode, serial sound data is output from this pin. In analog mode, this
			signal goes high between samples to allow for DAC settling.
	SINK	175	I	ExternalSink, This signal is used to synchronise VIDC20 with another video
			system. When high, is set to zero, and in an interlaced display system, the odd
			field is selected. The horizontal timer system is unaffected by this signal.
	SIAEF	22	IA	Sound Reference Current. A referen<e current must be fed into this pin in
			order to calibrate the sound DAC outputs. For most applications, a resistor to
			VDD is sufficient, although a constant current source is recommended.
	TCK	29	IF	Test Clock. This is the boundary scan clock. There is an internal pullup resistor
			to VDD, so this should normally be left unconnected.
	TDI	31	IF	Test Data In. Data for boundary scan testing is input [o the chip on this pin.
			There is an internal pullup resistor [o VDD, which should be left unconnected
			in normal mode.
	TDO	32	OS8	Test Data Oct. Output data from boundary s<an testing.
	iMS	30	IF	Test mode select M input to the boundary star, logic, which should be left
			unconnected in normal mode since it has an internal pullup resistor to VDD.
	VCLKI	112	I	Phase Comp arator Clock In. See Chapter 5.0 Pixel Clock.
	VCLKO	113	O58	Phase Came aratorClock OutSeeChapter 5.0Pixel Clock.
	VDD	9,19,40,	P	Posit7ve(+SV)Supply,
	70,87,		
	116		
	VDD_Analog	34	P	Posit{ve(+SV)supply foranalogvideo system. I
	VOD_Sound	23	P	Positwe (,5V) supply for analog sound system.
	ViREF	33	IA	VideoReEeren<eCurrent.ThevideoDACsneedareferencecurrentinorderto
			calibrate them. A constant current source is recommended, although a resistor
			up to VDD is sufficient for many applications.
	VnC	119	OS8	Video NOT Cursor. This signal is used by the external memory controller to
			differentiate between video and cm,,, DMA requests.
	VSS	10,21,	P	Supply Ground.
	39,69,		
	88,114		
Table 1: Signal Description