Motorola MVME1X7P - Manual (Page 14)

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CHAPTER 4 MCECC Functions
Introduction ............................................................................................................... 4-1
Features...................................................................................................................... 4 -2
Functional Description .............................................................................................. 4-3
General Description............................................................................................ 4-3
Performance........................................................................................................ 4-3
Cache Coherency................................................................................................ 4-4
ECC .................................................................................................................... 4-5
Cycle Types................................................................................................. 4-5
Error Reporting ........................................................................................... 4-5
Single Bit Error (Cycle Type = Burst Read or Non-Burst Read) ............... 4-5
Double Bit Error (Cycle Type = Burst Read or Non-Burst Read) .............. 4-6
Triple (or Greater) Bit Error
(Cycle Type = Burst Read or Non-Burst Read) .................................. 4-6
Cycle Type = Burst Write ........................................................................... 4-6
Single Bit Error (Cycle Type = Non-Burst Write)...................................... 4-6
Double Bit Error (Cycle Type = Non-Burst Write) .................................... 4-6
Triple (or Greater) Bit Error (Cycle Type = Non-Burst Write) .................. 4-7
Single Bit Error (Cycle Type = Scrub) ....................................................... 4-7
Double Bit Error (Cycle Type = Scrub) ...................................................... 4-7
Triple (or Greater) Bit Error (Cycle Type = Scrub) .................................... 4-7
Error Logging ..................................................................................................... 4-8
Scrub................................................................................................................... 4-8
Refresh................................................................................................................ 4-8
Arbitration .......................................................................................................... 4-9
Chip Defaults...................................................................................................... 4-9
Programming Model................................................................................................ 4-10
Chip ID Register............................................................................................... 4-13
Chip Revision Register..................................................................................... 4-13
Memory Configuration Register ...................................................................... 4-14
Base Address Register...................................................................................... 4-15
DRAM Control Register .................................................................................. 4-15
BCLK Frequency Register ............................................................................... 4-16
Data Control Register ....................................................................................... 4-17
Scrub Control Register ..................................................................................... 4-19
Scrub Period Register Bits 15-8 ....................................................................... 4-20
Scrub Period Register Bits 7-0 ......................................................................... 4-20
Chip Prescaler Counter..................................................................................... 4-21
Scrub Time On/Time Off Register ................................................................... 4-21
Scrub Prescaler Counter (Bits 21-16)............................................................... 4-23
Scrub Prescaler Counter (Bits 15-8)................................................................. 4-23