Cypress CYV15G0404DXB Rxcksela, Rxckselb, Rxckselc, Rxckseld, Rxratea, Rxrateb, Rxratec, Rxrated

		CYV15G0404DXB
Table 9. Device Configuration and Control Latch Descriptions (continued)
Name	Signal Description
RXCKSELA	Receive Clock Select. The initialization value of the RXCKSELx latch = 1. RXCKSELx selects the receive
RXCKSELB	clock source used to transfer data to the Output Registers and the clock source for the RXCLK± output. When
RXCKSELC	RXCKSELx = 1, the associated Output Registers, are clocked by REFCLKx± at the associated RXCLKx±
RXCKSELD	output buffer. When RXCKSELx = 0, the associated Output Registers, are clocked by the Recovered Byte
	clock at the associated RXCLKx± output buffer. These output clocks may operate at the character-rate or half
	the character-rate as selected by RXRATEx.
RXRATEA	Receive Clock Rate Select. The initialization value of the RXRATEx latch = 1. RXRATEx is used to select the
RXRATEB	rate of the RXCLKx± clock output.
RXRATEC	When RXRATEx = 1 and RXCKSELx = 0, the RXCLKx± clock outputs are complementary clocks that follow
RXRATED
	the recovered clock operating at half the character rate. Data for the associated receive channels should be
	latched alternately on the rising edge of RXCLKx+ and RXCLKx–.
	When RXRATEx = 0 and RXCKSELx = 0, the RXCLKx± clock outputs are complementary clocks that follow
	the recovered clock operating at the character rate. Data for the associated receive channels should be latched
	on the rising edge of RXCLKx+ or falling edge of RXCLKx–.
	When RXRATEx = 1 with RXCKSELx = 1 and REFCLKx± is a full rate clock, the RXCLKx± clock outputs are
	complementary clocks that follow the reference clock operating at half the character rate. Data for the
	associated receive channels should be latched alternately on the rising edge of RXCLKx+ and RXCLKx–.
	When RXRATEx = 0 with RXCKSELx = 1 and REFCLKx± is a full rate clock, the RXCLKx± clock outputs are
	complementary clocks that follow the reference clock operating at the character rate. Data for the associated
	receive channels should be latched on the rising edge of RXCLKx+ or falling edge of RXCLKx–.
	When RXCKSELx = 1 and REFCLKx± is a half rate clock, the value of RXRATEx is not interpreted and the
	RXCLKx± clock outputs are complementary clocks that follow the reference clock operating at half the
	character rate. Data for the associated receive channels should be latched alternately on the rising edge of
	RXCLKx+ and RXCLKx–.
SDASEL1A[1:0]	Primary Serial Data Input Signal Detector Amplitude Select. The initialization value of the SDASEL1x[1:0]
SDASEL1B[1:0]	latch = 10. SDASEL1x[1:0] selects the trip point for the detection of a valid signal for the INx1± Primary
SDASEL1C[1:0]	Differential Serial Data Inputs.
SDASEL1D[1:0]	When SDASEL1x[1:0] = 00, the Analog Signal Detector is disabled.
	When SDASEL1x[1:0] = 01, the typical p-p differential voltage threshold level is 140 mV.
	When SDASEL1x[1:0] = 10, the typical p-p differential voltage threshold level is 280 mV.
	When SDASEL1x[1:0] = 11, the typical p-p differential voltage threshold level is 420 mV.
SDASEL2A[1:0]	Secondary Serial Data Input Signal Detector Amplitude Select. The initialization value of the
SDASEL2B[1:0]	SDASEL2x[1:0] latch = 10. SDASEL2x[1:0] selects the trip point for the detection of a valid signal for the INx2±
SDASEL2C[1:0]	Secondary Differential Serial Data Inputs.
SDASEL2D[1:0]	When SDASEL2x[1:0] = 00, the Analog Signal Detector is disabled
	When SDASEL2x[1:0] = 01, the typical p-p differential voltage threshold level is 140 mV.
	When SDASEL2x[1:0] = 10, the typical p-p differential voltage threshold level is 280 mV.
	When SDASEL2x[1:0] = 11, the typical p-p differential voltage threshold level is 420 mV.
ENCBYPA	Transmit Encoder Bypassed. The initialization value of the ENCBYPx latch = 1. ENCBYPx selects if the
ENCBYPB	Transmit Encoder is enabled or bypassed. When ENCBYPx = 1, the Transmit encoder is enabled. When
ENCBYPC	ENCBYPx = 0, the Transmit Encoder is bypassed and raw 10-bit characters are transmitted.
ENCBYPD
TXCKSELA	Transmit Clock Select. The initialization value of the TXCKSELx latch = 1. TXCKSELx selects the clock
TXCKSELB	source used to write data into the Transmit Input Register. When TXCKSELx = 1, the associated input register,
TXCKSELC	TXDx[7:0] and TXCTx[1:0], is clocked by REFCLKx↑. In this mode, the phase alignment buffer in the transmit
TXCKSELD	path is bypassed. When TXCKSELx = 0, the associated TXCLKx↑ is used to clock in the input registers,
	TXDx[7:0] and TXCTx[1:0].

Document #: 38-02097 Rev. *B Page 21 of 44

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