MCF5441X Tower Module Hardware Specification
Page 19 of 31
The value of BLL[15:0] of serial boot header (7-byte) will determine whether the code will continue to
load from SPI memory at offset 7 to internal SRAM and boot from internal SRAM. If the value of
BLL[15:0] is cleared, the serial boot facility will not continue to access SPI memory after offset 6.
Instead, it will depend on the SBF_RCON bit 29 to determine whether the code will continue to load at
address 0 either from FlexBus or NAND flash.
Se
ri
al
R
CO
N
BO
O
T
Por
t
si
ze
Boo
t
M
e
m
or
y
R
e
ser
ve
d
FB_A
LE
select
O
sci
lla
to
r
m
od
e
PL
L
m
od
e
PL
L
R
e
fe
re
n
ce
Di
vid
e
r
PL
L
Cl
oc
k
M
u
lti
p
lie
r
Bi
t
31
30
29
28
27
26
25
24
23
22
21
20
19
18
1
7
16
Se
rial
RC
ON
Fl
e
xBu
s
Ha
lf
Cl
oc
k
NA
ND
Fl
ash
Co
n
tr
ol
le
r
Cl
oc
k
Di
vid
e
r
In
ter
n
al
Bus
Cl
oc
k
Di
vid
e
r
Co
re
Bus
Cl
oc
k
Di
vid
e
r
B
it
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Table 13 - Easy Configurable Serial RCON
