ELANSC400-66AI AMD (ADVANCED MICRO DEVICES), ELANSC400-66AI Datasheet - Page 103

• Manufacturer Part Number: ELANSC400-66AI
• Manufacturer: AMD (ADVANCED MICRO DEVICES)

Specifications of ELANSC400-66AI

• Cpu Family: Elan
• Device Core Size: 16/32Bit
• Frequency (max): 66MHz
• Interface Type: ISA
• Program Memory Type: ROMLess
• Program Memory Size: Not Required
• Number Of Timers - General Purpose: 1
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (max): 3.6V
• Operating Supply Voltage (min): 3V
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 95C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 292
• Package Type: BGA
• Lead Free Status / Rohs Status: Not Compliant

CASH3–CASH0
Notes:
Because the sequence shown above is performed when the microcontroller is in Suspend mode, the DRAMs must self-refresh.
The RAS and CAS signals are held active (Low) for the entire time that the microcontroller is in Suspend mode. The timing
diagram also shows a following cycle that brings RAS and CAS High again. The Low period of RAS and CAS can be of a long
duration.
CASL3–CASL0
CASH3–CASH0
CASL3–CASL0
clk_mem
RAS0
RAS1
RAS2
RAS3
MWE
MWE
RAS
Élan™SC400 and ÉlanSC410 Microcontrollers Data Sheet
t7a
t27
Figure 40. DRAM CAS-Before-RAS Refresh
t27
t27
t27
t27
t7a
t21
t32
t28
Figure 41. DRAM Self-Refresh
t32
t32
t28
t28
t32
t28
t28
SS
SS
t30
t29
t22
t29
t29
t22
t29
t22
t22
t33
t33
t33
t33
7a
t27
t7a
t31
t27
t27
t27
t27
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