L64780 LSI Logic Corporation, L64780 Datasheet - Page 44

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

3.2 MUXIN Interface
3-8
The MUXIN bus lets you enter data (or test vectors) into the device at
specific locations, which lets you bypass some front functional blocks and
test an internal functional block.
Important:
The MUXIN bus (MUXINBUS) is a 27-bit wide bus, multiplexed with the
bypass ADC bus (DIGADCIN[9:0]).
Table 3.1
Clocking data into the chip is very simple because the L64780 offers a
clock output (CLKMUXIN) that automatically has the correct phase and
frequency. CLKMUXIN automatically selects the correct internal clock,
depending on the block selected. Figure 3.15 shows how to connect
external logic that brings the data to the MUXINBUS.
Figure 3.15 MUXIN Signals Interface
Interfaces
DATA GENERATOR
MUXINBUS[26:10]
MUXIN[16:0]
TEST_VECTOR
This interface is used for LSI Logic internal testing and is
not intended for use in customer production receivers.
MUXINBUS Mapping
CLK
27
MUXINBUS[9:0]
DIGADCIN[9:0]
Table 3.1
CLKMUXIN
MUXINBUS[26:0]
L64780
shows the bus mapping.