Memory Controller Programming Model
MSC8113 Reference Manual, Rev. 0
Freescale Semiconductor
12-101
ORx
Option Registers—GPCM Mode
Bit
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
AM
Type
R/W
Reset
1
See note.
Bit
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
AM
—
BCTLD CSNT
ACS
—
SCY
SETA TRLX EHTR
—
Type
R/W
Reset
1
See note.
Notes: 1.
After a system reset the OR0 has value 0xFE000EF4.
2.
The boot sequence sets OR9 to 0xFFFC0008 (see Section 12.7.2) and OR11 to 0xFFE00000 (see Section
3.
The other OR registers are not initialized at reset.
Table 12-33. ORx Bit Descriptions (GPCM Mode)
Name
Reset
Description
Settings
AM
0–16
—
Address Mask
Masks corresponding BRx bits. Masking address
bits independently allows external devices of
different size address ranges to be used. When
AM is set, address mask bits can be set or cleared
in any order in the field, allowing a resource to
reside in more than one area of the address map.
AM can be read or written at any time.
Note:
After system reset, OR0[AM] is
0b11111110000000000.
The boot sequence sets OR9[AM] to
0b11111111111111000.
0
Corresponding address bits are masked.
1
The corresponding address bits are used in
the comparison with address lines.
—
17–18
—
Reserved. Write to zero for future compatibility.
BCTLD
19
—
Data Buffer Control Disable
Disables the assertion of BCTLx during access to
the current memory bank. See Section 12.1,
Basic Architecture, on page 12-9.
Note:
After system reset OR0[BCTLD] is
cleared. The boot sequence clears
OR9[BCTLD].
0
BCTLx is asserted upon access to the
current memory bank.
1
BCTLx is not asserted upon access to the
current memory bank.
CSNT
20
—
Chip-Select Deassertion Time
Determines when CS/PWE are deasserted during
an external memory write access handled by the
GPCM. This helps meet address/data hold times
for slow memories and peripherals.
Note:
After system reset OR0[CSNT] is set.
The boot sequence clears OR9[CSNT].
0
CS/PWE are deasserted normally.
1
CS/PWE are deasserted a quarter of a
clock earlier.
ACS
21–22
—
Address to Chip-Select Set-Up
Can be used when the external memory access is
handled by the GPCM. It allows the delay of the
CS assertion relative to the address change.
Note:
After a system reset, OR0[ACS] is 11.
The boot sequence writes 00 to
OR9[ACS].
00
CS is output at the same time as the
address lines.
01
Reserved.
10
CS is output a quarter of a clock after the
address lines.
11
CS is output half a clock after the address
lines.
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 ...