L64780 LSI Logic Corporation, L64780 Datasheet - Page 89

• Manufacturer Part Number: L64780
• Description: Dvb-t Cofdm Demodulator Technical Manual 2/00
• Manufacturer: LSI Logic Corporation

SD_CTRL
MUX_CTRL
SOFT_RESET Chip Soft Reset
AUTO_MODE_ENABLE
CHANGE_MODE
Mode Register Address Line 0x19
Normal Output 3-State Controller
When this bit is 1, all Normal pins are 3-stated. The initial
condition for this bit is 0, normal mode.
MUXOUT 3-State Controller
When this bit is 1, all MUXOUT pins are 3-stated. The
initial condition for this bit is 0, normal mode.
Setting this bit enables a hard reset of the L64780 logic
(except the OBC registers, which keep their values). This
allows a proper reset of the chip in any default
configuration (memories are also reset to 0). Note that
the Soft Reset must be asserted from the external
microcontroller; it is not a pulse. When this bit is 1, soft
reset is enabled. When this bit is 0, no soft reset is
possible.
TPS Auto Updating
This bit determines if the TPS updating is controlled by
the external microcontroller, or if the Active registers are
automatically updated each time new value TPS arrive
from the Broadcaster.
If this bit is 1, the current mode (as defined by the TPS
register) of the demodulator is updated whenever a valid
TPS is received.
If this bit is 0, manual configuration of the TPS register is
required.
The initial condition for this bit is 0, Manual Update.
TPS Updating Register
When a new mode of operation has been written into the
TPS register, writing the value 1 into this location causes
the demodulator to change mode. See
Registers,” page 4-11
for more information.
Section 4.3, “TPS
R/W 4
R/W 3
R/W 2
R/W 1
W 0
4-37