
SDRAM Controller (SDRAMC)
18-18
Freescale Semiconductor
Address: 0xFC0B_8008 (SDCFG1)
Access: User read/write
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
R
SRD2RWP
0
SWT2RWP
RD_LAT
0
ACT2RW
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R
0
PRE2ACT
REF2ACT
0
WT_LAT
0
0
0
0
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 18-7. SDRAM Configuration Register 1 (SDCFG1)
Table 18-9. SDCFG1 Field Descriptions
Field
Description
31–28
SRD2RWP
Single read to read/write/precharge delay. Limiting case is read to write.
SDR: SRD2RWP = CL
+ t
HZ
+ 2
DDR: SRD2RWP = CL + 1
t
HZ
is the time the data bus uses to return to hi-impedance after a read and is found in the SDRAM device
specifications.
Note: Count value is in SD_CLK periods for SDR and DDR mode.
27
Reserved, must be cleared.
26–24
SWT2RWP
Single write to read/write/precharge delay. Limiting case is write to precharge.
SDR: SWT2RWP = t
WR
DDR: SWT2RWP = t
WR
+ 1
Note: Count value is in SD_CLK periods for SDR and DDR mode.
23–20
RD_LAT
Read CAS Latency. Read command to read data available delay counter.
For DDR:
If CL = 2, write 0x6
If CL = 2.5, write 0x7
For SDR:
If CL = 2, write 0x2
If CL = 3, write 0x3
Note: The recommended values are just a starting point and may need to be adjusted depending on the trace
length for the data and DQS lines.
CL = 2.5 is not supported for SDR.
SDR: Count value is in SD_CLK periods.
DDR: Count value is in SD_CLK2 periods.
19
Reserved, must be cleared.
18–16
ACT2RW
Active to read/write delay. Active command to any following read- or write-delay counter.
Suggested value = (t
RCD
×
f
SD_CLK
) - 1 (Round up to nearest integer)
Example:
If t
RCD
= 20ns and f
SD_CLK
= 99 MHz
Suggested value = (20ns
×
99 MHz) - 1= 0.98; round to 1.
Note: Count value is in SD_CLK periods for SDR and DDR modes.
MCF5329 Reference Manual, Rev 3
Summary of Contents for MCF5329
Page 106: ...ColdFire Core 3 32 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 148: ...Cache 5 22 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 154: ...Static RAM SRAM 6 6 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 184: ...Power Management 8 18 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 204: ...Reset Controller Module 10 8 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 220: ...System Control Module SCM 11 16 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 228: ...Crossbar Switch XBS 12 8 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 268: ...General Purpose I O Module 13 40 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 392: ...SDRAM Controller SDRAMC 18 30 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 436: ...Fast Ethernet Controller FEC 19 44 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 594: ...FlexCAN 23 30 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 678: ...Pulse Width Modulation PWM Module 26 22 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 684: ...Watchdog Timer Module 27 6 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 704: ...DMA Timers DTIM0 DTIM3 29 12 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 754: ...UART Modules 31 34 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 770: ...I2 C Interface 32 16 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 866: ...Debug Module 36 50 Freescale Semiconductor MCF5329 Reference Manual Rev 3...