
Spartan-3A DSP FPGA Family: DC and Switching Characteristics
DS610 (v3.0) October 4, 2010
www.xilinx.com
Product Specification
58
Byte Peripheral Interface (BPI) Configuration Timing
X-Ref Target - Figure 14
Figure 14:
Waveforms for Byte-wide Peripheral Interface (BPI) Configuration
Table 54:
Timing for Byte-wide Peripheral Interface (BPI) Configuration Mode
Symbol
Description
Minimum
Maximum
Units
T
CCLK1
Initial CCLK clock period
See
Table 46
T
CCLK
n
CCLK clock period after FPGA loads ConfigRate setting
See
Table 46
T
MINIT
Setup time on M[2:0] mode pins before the rising edge of INIT_B
50
–
ns
T
INITM
Hold time on M[2:0] mode pins after the rising edge of INIT_B
0
–
ns
T
INITADDR
Minimum period of initial A[25:0] address cycle; LDC[2:0] and HDC are asserted
and valid
5
5
T
CCLK1
cycles
T
CCO
Address A[25:0] outputs valid after CCLK falling edge
See
Table 50
T
DCC
Setup time on D[7:0] data inputs before CCLK rising edge
See T
SMDCC
in
Table 51
T
CCD
Hold time on D[7:0] data inputs after CCLK rising edge
0
–
ns
(Inp
u
t)
PUDC_B m
us
t
b
e
s
t
ab
le
b
efore INIT_B goe
s
High
a
nd con
s
t
a
nt thro
u
gho
u
t the config
u
r
a
tion proce
ss
.
D
a
t
a
D
a
t
a
D
a
t
a
Addre
ss
Addre
ss
D
a
t
a
Addre
ss
Byte 0
000_0000
INIT_B
<0:1:0>
M[2:0]
T
MINIT
T
INITM
LDC[2:0]
HDC
C
S
O_B
Byte 1
000_0001
CCLK
A[25:0]
D[7:0]
T
DCC
T
CCD
T
AVQV
T
CCLK1
(Inp
u
t)
T
INITADDR
T
CCLK
n
T
CCLK1
T
CCO
PUDC_B
New
ConfigR
a
te
a
ctive
Pin initi
a
lly p
u
lled High
b
y intern
a
l p
u
ll-
u
p re
s
i
s
tor if PUDC_B inp
u
t i
s
Low.
Pin initi
a
lly high-imped
a
nce (Hi-Z) if PUDC_B inp
u
t i
s
High.
Mode inp
u
t pin
s
M[2:0]
a
re
sa
mpled when INIT_B goe
s
High. After thi
s
point,
inp
u
t v
a
l
u
e
s
do not m
a
tter
u
ntil DONE goe
s
High,
a
t which point the mode pin
s
b
ecome
us
er-I/O pin
s
.
(Inp
u
t)
PROG_B
(Inp
u
t)
D
S
529-
3
_05_090610
(Open-Dr
a
in)
S
h
a
ded v
a
l
u
e
s
indic
a
te
s
pecific
a
tion
s
on
a
tt
a
ched p
a
r
a
llel NOR Fl
as
h PROM.