MSC8113 Reference Manual, Rev. 0
12-34
Freescale Semiconductor
Memory Controller
12.3.1 GPCM Signals: Timing Configuration
If BRx[MS] selects the GPCM, the attributes for the memory cycle are taken from ORx. These
attributes include the ORx[CSNT], ORx[ACS], ORx[SCY], ORx[SETA], ORx[TRLX], and
ORx[EHTR] fields. Table 12-16 shows signal behavior and system response.
12.3.1.1 Chip-Select Assertion Timing
From 0 to 30 wait states can be programmed for
PSDVAL
generation. Byte-write enable signals
(
PWE
) are available for each byte written to memory. Also, the output enable signal (
POE
)
eliminates external glue logic. The memory banks selected to work with the GPCM have unique
features. On system reset, a global (boot) chip-select provides a boot ROM chip-select before the
system is fully configured. The banks selected to work with the GPCM support an option to
output the
CS
line at different timings with respect to the external address bus.
CS
can be output in
any of three configurations:
Simultaneous with the external address
One quarter of a clock cycle later
One half of a clock cycle later
Table 12-16. GPCM Strobe Signal Behavior
Option Register Attributes
Signal Behavior
TRLX Access ACS
CSNT
Address to CS
Asserted
CS Deasserted to
Address Change
PWE Deasserted to
Address/Data Invalid
Total Cycles
0
Read
00
x
0
0
x
2 + SCY
0
Read
10
x
1/4
×
Clock
0
x
2 + SCY
0
Read
11
x
1/2
×
Clock
0
x
2 + SCY
0
Write
00
0
0
0
0
2 + SCY
0
Write
10
0
1/4
×
Clock
0
0
2 + SCY
0
Write
11
0
1/2
×
Clock
0
0
2 + SCY
0
Write
00
1
0
0
–1/4
×
Clock
2 + SCY
0
Write
10
1
1/4
×
Clock
–1/4
×
Clock
–1/4
×
Clock
2 + SCY
0
Write
11
1
1/2
×
Clock
–1/4
×
Clock
–1/4
×
Clock
2 + SCY
1
Read
00
x
0
0
x
2 + (2
×
SCY)
1
Read
10
x
(1 + 1/4)
×
Clock
0
x
3 + (2
×
SCY)
1
Read
11
x
(1 + 1/2)
×
Clock
0
x
3 + (2
×
SCY)
1
Write
00
0
0
0
0
2 + (2
×
SCY)
1
Write
10
0
(1 + 1/4)
×
Clock
0
0
3 + (2
×
SCY)
1
Write
11
0
(1 + 1/2)
×
Clock
0
0
3 + (2
×
SCY)
1
Write
00
1
0
0
–(1 + 1/4)
×
Clock
3 + (2
×
SCY)
1
Write
10
1
(1 + 1/4)
×
Clock
–(1 + 1/4)
×
Clock
–(1 + 1/4)
×
Clock
4 + (2
×
SCY)
1
Write
11
1
(1 + 1/2)
×
Clock
–(1 + 1/4)
×
Clock
–(1 + 1/4)
×
Clock
4 + (2
×
SCY)
SCY is the number of wait cycles from the option register.
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 ...