Cypress Quad HOTLink II CYV15G0404RB User Manual
Page 15
CYV15G0404RB
Document #: 38-02102 Rev. *C
Page 15 of 27
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.]
RXPLLPDA
RXPLLPDB
RXPLLPDC
RXPLLPDD
Receive Channel Enable. The initialization value of the RXPLLPDx latch = 0. RXPLLPDx selects whether
the associated receive channel is enabled or powered down. RXPLLPDx = 0 powers down the associated
receive PLL and analog circuitry. RXPLLPDx = 1 enables the associated receive PLL and analog circuitry.
RXBISTA[1:0]
RXBISTB[1:0]
RXBISTC[1:0]
RXBISTD[1:0]
Receive Bist Disable / SMPTE Receive Enable. The initialization value of the RXBISTx[1:0] latch = 11.
For SMPTE data reception, RXBISTx[1:0] should not remain in this initialization state (11). RXBISTx[1:0]
selects whether receive BIST is disabled or enabled and sets the associated channel for SMPTE data
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
ROE2B
ROE2C
ROE2D
Reclocker Secondary Differential Serial Data Output Driver Enable. The initialization value of the
ROE2x latch = 0. ROE2x selects whether the ROUT2± secondary differential output drivers are enabled
or disabled. ROE2x = 1 enables the associated serial data output driver, allowing data to be transmitted
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
ROE1B
ROE1C
ROE1D
Reclocker Primary Differential Serial Data Output Driver Enable. The initialization value of the ROE1x
latch = 0. ROE1x selects whether the ROUT1± primary differential output drivers are enabled or disabled.
ROE1x = 1 enables the associated serial data output driver, allowing data to be transmitted from the
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.
Table 3. Device Configuration and Control Latch Descriptions (continued)
Name
Signal Description