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TABLE OF CONTENTS (Continued)
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viii
USERS MANUAL
MOTOROLA
10.2.1
Control Signals ......................................................................... 10-1
10.2.1.1
Row Address Strobes (RAS[0], RAS[1]) ....................... 10-1
10.2.1.2
Column Address Strobes (CAS[0:3])............................. 10-2
10.2.1.3
DRAM Write (DRAMW) ................................................ 10-3
10.2.2
Address Bus ............................................................................. 10-3
10.2.3
Data Bus .................................................................................. 10-4
10.3
DRAM Controller Operation ............................................................... 10-4
10.3.1
Reset Operation ....................................................................... 10-4
10.3.1.1
Master Reset ................................................................ 10-5
10.3.1.2
Normal Reset ................................................................ 10-5
10.3.2
Definition of DRAM Banks ........................................................ 10-5
10.3.2.1
Base Address and Address Masking ............................ 10-5
10.3.2.2
Access Permissions ..................................................... 10-7
10.3.2.3
Timing ........................................................................... 10-8
10.3.2.4
Page Mode ................................................................... 10-8
10.3.2.5
Port Size/Page Size ...................................................... 10-8
10.3.2.6
Address Multiplexing .................................................... 10-8
10.3.3
Normal Mode Operation ......................................................... 10-15
10.3.3.1
NonBurst Transfer In Normal Mode ............................ 10-16
10.3.3.2
Burst Transfer In Normal Mode .................................. 10-18
10.3.4
Fast Page Mode Operation .................................................... 10-20
10.3.4.1
Burst Transfer In Fast Page Mode ............................. 10-21
10.3.4.2
Page Hit Read Transfer In Fast Page Mode .............. 10-23
10.3.4.3
Page Hit Write Transfer in Fast Page Mode ............... 10-25
10.3.4.4
Page Miss Transfer in Fast Page Mode ..................... 10-27
10.3.4.5
Bus Arbitration ............................................................ 10-30
10.3.5
Burst Page Mode Operation ................................................... 10-32
10.3.6
Extended Data-Out (EDO) DRAM Operation ......................... 10-35
10.3.7
Refresh Operation .................................................................. 10-38
10.3.8
External Master Use of the DRAM Controller ........................ 10-40
10.3.8.1
External Master Non-Burst Transfer in Normal Mode
..................................................................................... 10-41
10.3.8.2
External Master Burst Transfer in Normal Mode ........ 10-44
10.3.8.3
External Master Burst Transfer in Burst Page Mode .. 10-47
10.3.8.4
Limitations .................................................................. 10-50
10.4
Programming Model ......................................................................... 10-51
10.4.1
DRAM Controller Registers Memory Map .............................. 10-51
10.4.2
DRAM Controller Registers .................................................... 10-51
10.4.2.1
DRAM Controller Refresh Register (DCRR) ............... 10-51
10.4.2.2
DRAM Controller Timing Register (DCTR) ................. 10-52
10.4.2.3
DRAM Controller Address Reg. (DCAR0 - DCAR1) ... 10-58
10.4.2.4
DRAM Controller Mask Reg. (DCMR0 - DCMR1) ....... 10-59
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Freescale Semiconductor, Inc.
For More Information On This Product,
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