Cypress CYV15G0404RB manual Page 15 of

CYV15G0404RB

Table 3. Device Configuration and Control Latch Descriptions (continued)

Name	Signal Description
RXPLLPDA	Receive Channel Enable. The initialization value of the RXPLLPDx latch = 0. RXPLLPDx selects whether
RXPLLPDB	the associated receive channel is enabled or powered down. RXPLLPDx = 0 powers down the associated
RXPLLPDC	receive PLL and analog circuitry. RXPLLPDx = 1 enables the associated receive PLL and analog circuitry.
RXPLLPDD
RXBISTA[1:0]	Receive Bist Disable / SMPTE Receive Enable. The initialization value of the RXBISTx[1:0] latch = 11.
RXBISTB[1:0]	For SMPTE data reception, RXBISTx[1:0] should not remain in this initialization state (11). RXBISTx[1:0]
RXBISTC[1:0]	selects whether receive BIST is disabled or enabled and sets the associated channel for SMPTE data
RXBISTD[1:0]	reception. RXBISTx[1:0] = 01 disables the receiver BIST function and sets the associated channel to
	receive SMPTE data. RXBISTx[1:0] = 10 enables the receive BIST function and sets the associated
	channel to receive BIST data. RXBISTx[1:0] = 00 and RXBISTx[1:0] = 11 are invalid states.
ROE2A	Reclocker Secondary Differential Serial Data Output Driver Enable. The initialization value of the
ROE2B	ROE2x latch = 0. ROE2x selects whether the ROUT2± secondary differential output drivers are enabled
ROE2C	or disabled. ROE2x = 1 enables the associated serial data output driver, allowing data to be transmitted
ROE2D	from the transmit shifter. ROE2x = 0 disables the associated serial data output driver. When the config-
	uration interface disables a driver, the driver internally powers down to reduce device power. If both serial
	drivers for a channel are in this disabled state, the associated internal logic for that channel also powers
	down. A device reset (RESET sampled LOW) disables all output drivers.
ROE1A	Reclocker Primary Differential Serial Data Output Driver Enable. The initialization value of the ROE1x
ROE1B	latch = 0. ROE1x selects whether the ROUT1± primary differential output drivers are enabled or disabled.
ROE1C	ROE1x = 1 enables the associated serial data output driver, allowing data to be transmitted from the
ROE1D	transmit shifter. ROE1x = 0 disables the associated serial data output driver. When the configuration
	interface disables a driver, the driver internally powers down to reduce device power. If both serial drivers
	for a channel are in this disabled state, the associated internal logic for that channel also powers down.
	A device reset (RESET sampled LOW) disables all output drivers.
GLEN[11..0]	Global Enable. The initialization value of the GLENx latch = 1. The GLENx reconfigures several channels
	simultaneously in applications where several channels may have the same configuration. When GLENx
	= 1 for a given address, that address can participate in a global configuration. When GLENx = 0 for a
	given address, that address cannot participate in a global configuration.
FGLEN[2..0]	Force Global Enable. The initialization value of the FGLENx latch is NA. The FGLENx latch forces a
	GLobal ENable no matter what the setting is on the GLENx latch. If FGLENx = 1 for the associated Global
	channel, FGLEN forces the global update of the target latch banks.

Device Configuration Strategy

Follow these steps to load the configuration latches on each channel:

1.Pulse RESET Low after device power up. This operation resets all four channels. Initialize the JTAG state machine to its reset state, as detailed in “JTAG Support” on page 17.

2.Set the static latch banks for the target channel. You can perform this step using a global operation, if the application

permits it. [This is an optional step if the default settings match the desired configuration.]

3.Set the dynamic bank of latches for the target channel. Enable the Receive PLLs and set each channel for SMPTE data reception (RXBISTx[1:0] = 01) or BIST data reception (RXBISTx[1:0] = 10). You can perform this step using a global operation, if the application permits it. [Required step.]

Document #: 38-02102 Rev. *C Page 15 of 27

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