Lblawar0-Lblawar3 Bit Settings; Lblawar0[En] Reset Value - Freescale Semiconductor MPC8313E Family Reference Manual

5.2.4.4 LBC Local Access Window n Attributes Registers
(LBLAWAR0–LBLAWAR3)
The LBC local access window n attributes registers (LBLAWAR0–LBLAWAR3) are shown in
Offset 0x24, 0x2C, 0x34, 0x3C
0 1
R
EN
W
1
Reset 0 0 0 0 0
1 The LBLAWAR0[EN] reset value depends on the reset configuration word high values. See
and LBLAWAR0[SIZE] Reset Value,"
2 The LBLAWAR0[SIZE] reset value is always 0b010110, meaning an 8-Mbyte local access window. See
"LBLAWAR0[EN] and LBLAWAR0[SIZE] Reset Value,"
Figure 5-5. LBC Local Access Window n Attributes Registers (LBLAWAR0–LBLAWAR3)
Table 5-9 defines the bit fields of LBLAWAR0–LBLAWAR3.
'
Bits Name
0 EN 0 Local bus local access window n is disabled.
1 Local bus local access window n is enabled and other LBLAWAR0 and LBLAWBAR0 fields combine to
identify an address range for this window.
1–25 — Reserved. Write has no effect, read returns 0.
26–31 SIZE Identifies the size of the window from the starting address. Window size is 2
000000–001010 Reserved. Window is undefined.
001011 4 Kbytes
001100 8 Kbytes
001101 16 Kbytes
. . . . . . . 2
011110 2 Gbytes
011111–111111 Reserved. Window is undefined.
5.2.4.4.1 LBLAWAR0[EN] and LBLAWAR0[SIZE] Reset Value
The core may use a local bus peripheral device to fetch its boot vector. For this purpose an 8-Mbyte
(22+1)
(2 ) local access window is defined by the LBLAWBAR0[SIZE] reset value, and LBLAWAR0 is
enabled according to the value set in the reset configuration word high ROMLOC field.
Table 5-10 defines the reset value for LBLAWAR0[EN].
'
RCWHR[RLEXT]/
RCWHR[ROMLOC]
00 / 000–100
00 / 101–111
MPC8313E PowerQUICC II Pro Integrated Processor Family Reference Manual, Rev. 3
Freescale Semiconductor
0 0 0 0 0 0 0
for a detailed description.
Table 5-9. LBLAWAR0–LBLAWAR3 Bit Settings
(SIZE+1)
bytes
Table 5-10. LBLAWAR0[EN] Reset Value
LBLAWAR0[EN]
Reset Value
0 e300c3 core boot not performed from a local bus device.
1 e300c3 core boot performed from a local bus device. Local bus 8-Mbyte
(22+1)
(2
——
0 0 0 0 0 0 0 0
for a detailed description.
Description
Description
) local access window is enabled.
System Configuration
Access: Read/Write
25 26
0 0 0 0 0 0 0 0
Section 5.2.4.4.1, "LBLAWAR0[EN]
Section 5.2.4.4.1,
(SIZE+1)
bytes.
Figure 5-5.
31
SIZE
2
0 0 0 0
5-9