MPC8544COMEDEV Freescale Semiconductor, MPC8544COMEDEV Datasheet - Page 340

• Manufacturer Part Number: MPC8544COMEDEV
• Description: KIT DEV EXPRESS MPC8544COM
• Manufacturer: Freescale Semiconductor
• Type: MPUr

Specifications of MPC8544COMEDEV

• Contents: Board
• For Use With/related Products: MPC8544
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

DDR Memory Controller
9.4.1.5
DDR SDRAM timing configuration register 1, shown in
between various SDRAM control commands.
Table 9-10
9-16
Offset 0x108
Reset
20–23
24–27
28–31
Bits
Bits
0
W
R
— PRETOACT
0
ODT_PD_EXIT ODT powerdown exit timing (t
Name
1
MRS_CYC
—
describes TIMING_CFG_1 fields.
Name
DDR SDRAM Timing Configuration 1 (TIMING_CFG_1)
—
MPC8544E PowerQUICC III Integrated Host Processor Family Reference Manual, Rev. 1
Reserved, should be cleared.
3
Figure 9-6. DDR SDRAM Timing Configuration 1 (TIMING_CFG_1)
4
ACTTOPRE
before ODT may be asserted.
0000 0 clock
0001 1 clock
0010 2 clocks
0011 3 clocks
0100 4 clocks
0101 5 clocks
0110 6 clocks
0111 7 clocks
Reserved, should be cleared.
Mode register set cycle time (t
Register Set command until any other command.
0000 Reserved
0001 1 clock
0010 2 clocks
0011 3 clocks
0100 4 clocks
0101 5 clocks
0110 6 clocks
0111 7 clocks
Table 9-9. TIMING_CFG_0 Field Descriptions (continued)
Table 9-10. TIMING_CFG_1 Field Descriptions
7
— ACTTORW
8
9
11 12
AXPD
MRD
CASLAT
). Specifies how many clocks must pass after exiting powerdown
). Specifies the number of cycles that must pass after a Mode
All zeros
15 16
Description
Figure
Description
REFREC
1000 8 clocks
1001 9 clocks
1010 10 clocks
1011 11 clocks
1100 12 clocks
1101 13 clocks
1110 14 clocks
1111 15 clocks
1000 8 clocks
1001 9 clocks
1010 10 clocks
1011 11 clocks
1100 12 clocks
1101 13 clocks
1110 14 clocks
1111 15 clocks
9-6, sets the number of clock cycles
19 20 21
— WRREC — ACTTOACT — WRTORD
23 24 25
Freescale Semiconductor
Access: Read/Write
27 28 29
31