MSC8113 Reference Manual, Rev. 0
12-44
Freescale Semiconductor
Memory Controller
12.3.3 Boot Chip-Select Operation
Boot chip-select operation allows address decoding for a boot ROM before system initialization.
The
CS0
signal is the boot chip-select output; its operation differs from the other external
chip-select outputs on system reset. When the MSC8113 internal core begins accessing memory
at system reset,
CS0
is asserted for every address in the boot address range, unless an internal
register is accessed. The address range is configured during reset. The boot chip-select also
provides a programmable port size during system reset by using the configuration mechanism
described in Section 5.2, Reset Configuration. The boot chip-select does not provide write
protection.
CS0
operates this way until the first write to OR0, and it can be used as any other
chip-select register once the preferred address range is loaded into BR0. After the first write to
OR0, the boot chip-select can be restarted only on hardware reset. Table 12-18 describes the
initial values of the boot bank in the memory controller.
12.3.4 Differences Between MPC8xx GPCM and MSC8113 GPCM
If you are familiar with the MPC8xx GPCM, you should know about the following differences
between the MPC8xx GPCM and the MSC8113 GPCM:
External termination. In the MPC8xx the external termination connects to the external
system bus
TA
signal and so must be asserted in sync with the system clock. In the
MSC8113, this signal is separated from the bus and named
PGTA
. The signal is
synchronized internally and sampled. The sampled signal is used to generate
TA
, which
terminates the bus transaction.
Extended hold time. Extended hold time for reads can be up to eight clock cycles (instead
of one in the MPC8xx).
Table 12-18. Boot Bank Field Values After Reset
Register
Settings
BR0
BA[0–16]
PS [0–1]
DECC[0–1]
WP
MS[0–2]
EMEMC
ATOM[0–1]
DR
V
11111110000000000
From HRCW. See Section 5.6.1, Hard Reset Configuration Word.
00
0
000
From HRCW.
00
0
1
OR0
AM[0–16]
BCTLD
CSNT
ACS[0–1]
SCY[0–3]
SETA
TRLX
EHTR
11111110000000000 (32 MB)
0
1
11
1111
0
1
0
Summary of Contents for MSC8113
Page 1: ...MSC8113 Reference Manual Tri Core 16 Bit Digital Signal Processor MSC8113RM Rev 0 May 2008 ...
Page 20: ...MSC8113 Reference Manual Rev 0 xx Freescale Semiconductor Contents ...
Page 28: ...MSC8113 Reference Manual Rev 0 xxviii Freescale Semiconductor ...
Page 56: ...MSC8113 Reference Manual Rev 0 1 28 Freescale Semiconductor MSC8113 Overview ...
Page 76: ...MSC8113 Reference Manual Rev 0 2 20 Freescale Semiconductor SC140 Core Overview ...
Page 134: ...MSC8113 Reference Manual Rev 0 4 30 Freescale Semiconductor System Interface Unit SIU ...
Page 168: ...MSC8113 Reference Manual Rev 0 6 18 Freescale Semiconductor Boot Program ...
Page 180: ...MSC8113 Reference Manual Rev 0 7 12 Freescale Semiconductor Clocks ...
Page 260: ...MSC8113 Reference Manual Rev 0 8 80 Freescale Semiconductor Memory Map ...
Page 300: ...MSC8113 Reference Manual Rev 0 9 40 Freescale Semiconductor Extended Core ...
Page 304: ...MSC8113 Reference Manual Rev 0 10 4 Freescale Semiconductor MQBus and M2 Memory ...
Page 308: ...MSC8113 Reference Manual Rev 0 11 4 Freescale Semiconductor SQBus ...
Page 590: ...MSC8113 Reference Manual Rev 0 17 46 Freescale Semiconductor Interrupt Processing ...
Page 614: ...MSC8113 Reference Manual Rev 0 18 24 Freescale Semiconductor Debugging ...
Page 622: ...MSC8113 Reference Manual Rev 0 19 8 Freescale Semiconductor Internal Peripheral Bus IPBus ...
Page 724: ...MSC8113 Reference Manual Rev 0 21 32 Freescale Semiconductor UART ...
Page 920: ...MSC8113 Reference Manual Rev 0 25 150 Freescale Semiconductor Ethernet Controller ...
Page 1171: ...MSC8113 Reference Manual Rev 0 Freescale Semiconductor C 61 EF wait_rts P 01077FFC 9F rts 71 ...
Page 1172: ...MSC8113 Reference Manual Rev 0 C 62 Freescale Semiconductor MSC8113 Boot Code ...
Page 1202: ...MSC8113 Reference Manual Rev 0 Index 30 Freescale Semiconductor Index ...