DSP56311VL150 Freescale Semiconductor, DSP56311VL150 Datasheet - Page 34

• Manufacturer Part Number: DSP56311VL150
• Description: IC DSP 24BIT FIXED POINT 196-BGA
• Manufacturer: Freescale Semiconductor
• Series: DSP563xxr
• Type: Fixed Pointr

Specifications of DSP56311VL150

• Interface: Host Interface, SSI, SCI
• Clock Rate: 150MHz
• Non-volatile Memory: ROM (576 B)
• On-chip Ram: 384kB
• Voltage - I/o: 3.30V
• Voltage - Core: 1.80V
• Operating Temperature: -40°C ~ 100°C
• Mounting Type: Surface Mount
• Package / Case: 196-MAPBGA
• Package: 196MA-BGA
• Numeric And Arithmetic Format: Fixed-Point
• Maximum Speed: 150 MHz
• Ram Size: 384 KB
• Device Million Instructions Per Second: 150 MIPS
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Specifications
2.4.5.2 DRAM Timing
The selection guides in Figure 2-12 and Figure 2-15 are for primary selection only. Final selection should be based
on the timing in the following tables. For example, the selection guide suggests that four wait states must be used
for 100 MHz operation with Page Mode DRAM. However, consulting the appropriate table, a designer can evaluate
whether fewer wait states might suffice by determining which timing prevents operation at 100 MHz, running the
chip at a slightly lower frequency (for example, 95 MHz), using faster DRAM (if it becomes available), and
manipulating control factors such as capacitive and resistive load to improve overall system performance.
2-14
No.
131
132
133
Page mode cycle time for two consecutive accesses of the same
direction
Page mode cycle time for mixed (read and write) accesses
CAS assertion to data valid (read)
Column address valid to data valid (read)
DRAM type
(tRAC ns)
100
Table 2-9.
80
70
60
Figure 2-12.
50
Characteristics
1 Wait states
2 Wait states
40
DRAM Page Mode Timings, Three Wait States
DSP56311 Technical Data, Rev. 8
DRAM Page Mode Wait State Selection Guide
Note:
66
This figure should be used for primary selection. For exact
and detailed timings, see the following tables.
80
Symbol
t
t
CAC
t
100
PC
AA
3 Wait states
4 Wait states
120
Expression
2 × T
3 × T
3.5 × T
4 × T
Chip frequency
(MHz)
C
C
− 5.7
− 5.7
C
C
1,2,3
4
Freescale Semiconductor
Min
40.0
35.0
—
—
100 MHz
Max
14.3
24.3
—
—
Unit
ns
ns
ns
ns