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MSC8113 Reference Manual, Rev. 0
12-58
Freescale Semiconductor
Memory Controller
General-Purpose Signals (
GxTx
,
GOx
).
PGPL[1–5]
each have two bits in the RAM word that
define the logical value of the signal to be changed at the rising edge of T1 and/or at the
rising edge of T3.
PGPL0
offers enhancements beyond the other
PGPLx
lines.
PGPL0
can be
controlled by an address line specified in MxMR[G0CLx]. To use this feature, set G0H
and G0L in the RAM word. For example, for a SIMM with multiple banks, this address
line can switch between banks.
Loop Control. The LOOP bit in the RAM word (bit 24) specifies the beginning and end of
a set of UPM RAM words that are to be repeated. The first time LOOP = 1, the memory
controller recognizes it as a loop start word and loads the memory loop counter with the
corresponding contents of the loop field shown in Table 12-23. The next RAM word for
which LOOP = 1 is recognized as a loop end word. When it is reached, the loop counter
decrements by one. Continued loop execution depends on the loop counter. If the counter
value is not zero, the next RAM word executed is the loop start word. Otherwise, the next
RAM word executed is the one after the loop end word. Loops can execute sequentially
but cannot nest.
Repeat Execution of Current RAM Word (REDO). The REDO function is useful for
wait-state insertion in a long UPM routine that would otherwise need too many RAM
words. Set the REDO bits of the RAM word to a nonzero value to cause the UPM to
re-execute the current RAM word up to three times, according to Table 12-21. Figure
12-68 shows an example of REDO use. Special care must be taken in the following cases:
— When UTA and REDO are both set,
PSDVAL
is asserted the number of times specified
by the REDO function.
— When LOOP and REDO are both set, the loop mechanism works as usual, and the line
is repeated according to the REDO function.
— LAST and REDO should not both be set.
— REDO should not be used within an exception routine.
Table 12-23. MxMR Loop Field Usage
Request Serviced
Loop Field
Read single-beat cycle
MxMR[RLFx]
Read burst cycle
MxMR[RLFx]
Write single-beat cycle
MxMR[WLFx]
Write burst cycle
MxMR[WLFx]
Refresh timer expired
MxMR[TLFx]
RUN
command
MxMR[RLFx]
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 ...