10.2.2.2 IGLOO® and ProASIC® 3 Dynamic CCC I/O Description

The following table lists the I/O description of a IGLOO and ProASIC3 Dynamic CCC .

Table 10-150. I/O Description
Name	Size	Type	Required/ Optional	Function
GLA	1	Output	Required	Primary clock output
CLKA	1	Input	Required	Reference clock
POWERDOWN	1	Input	Required	Power Down Signal. A low on this signal turns off the Dynamic CCC
LOCK	1	Output	Required	Dynamic CCC lock
SDOUT	1	Output	Required	Serial interface shift register output
SCLK	1	Input	Required	Shift clock
SSHIFT	1	Input	Optional	Serial Shift enable
SDIN	1	Input	Optional	Serial Data in for Dynamic CCC configuration bits
SUPDATE	1	Input	Optional	Serial update
MODE	1	Input	Optional	Dynamic or Static mode indicator. A Low on this signal indicates static mode and a High indicates dynamic.
EXTFB	1	Input	Optional	External feedback
CLKB	1	Input	Optional	Input clock for Secondary 1 clock; valid only in bypass mode.
GLB	1	Output	Optional	Global Output for Secondary1 Clock
YB	1	Output	Optional	Core Output for Secondary1 Clock
CLKC	1	Input	Optional	Input clock for Secondary 2 clock.; valid only in bypass mode.
GLC	1	Output	Optional	Global Output for Secondary2 Clock
YC	1	Output	Optional	Core Output for Secondary2 Clock