Philips Semiconductors
Preliminary specification
320 macrocell SRAM CPLD
PZ3320C/PZ3320N
PZ3320 has loaded its configuration data, it re-transmits incoming
configuration data on dout. When used in daisy-chained operation,
cclk is routed into all slave serial mode devices in parallel.
Slave Serial Mode
The slave serial mode is primarily used when multiple PZ3320s are
configured in a daisy-chain. The serial slave serial mode is also
used on the PZ3320 evaluation board, which interfaces to the
download cable. A device in the slave serial mode can be used as
the lead device in a daisy-chain. Figure 24 shows the interface for
the slave serial configuration mode.
Multiple slave PZ3320s can be loaded with identical configurations
simultaneously. This is done by loading the configuration data into
the din inputs in parallel.
The configuration data is provided into the PZ3320’s din input
synchronous with the configuration clock cclk input. After the
TO DAISY–CHAINED
DEVICES
dout
PZ3320
initn
prgmn
done
cclk
MICRO–
PROCESSOR
OR
DOWNLOAD
CABLE
data
+3.3V
M2
M1
M0
SP00661
Figure 24. Slave Serial Configuration Schematic
BIT N – 1
BIT N
BIT N + 1
DIN
t
S
t
H
CCLK
DOUT
t
D
t
CL
t
CH
BIT N – 1
BIT N
BIT N + 1
SP00610
Figure 25. Slave Serial Configuration Mode Timing Diagram
20
1998 Jul 22
XILINX [ XILINX, INC ]
