MCF5272VF66 Freescale, MCF5272VF66 Datasheet - Page 208

• Manufacturer Part Number: MCF5272VF66
• Manufacturer: Freescale

Specifications of MCF5272VF66

• Family Name: MCF5xxx
• Device Core: ColdFire
• Device Core Size: 32b
• Frequency (max): 66MHz
• Instruction Set Architecture: RISC
• Supply Voltage 1 (typ): 3.3V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 196
• Package Type: MA-BGA
• Lead Free Status / RoHS Status: Not Compliant

SDRAM Controller
9.10.2
Like the read operations, shown in
issue the address (T1) and another (T2) to determine whether the access is page hit or miss. In the
burst-write, page-miss example, shown in
miss (T2), the precharge old page (T3) and activate new page cycles (T5) are required. Cycle T6 is a wait
state for SDRAM activation command as it is in
9-18
A10_PRECHG
SDADR[13:0]
SDBA[1:0]
SDCLKE
SDCLK
BS[3:0]
D[31:0]
SDWE
SDCS
RAS0
CAS0
SDRAM Write Accesses
T0
Figure 9-11. SDRAM Burst Write, 32-Bit Port, Page Miss, Access = 7-1-1-1
CF2 Core
T1
Address
Issue
MCF5272 ColdFire
T2
Miss?
Page
Hit or
Figure 9-9
Precharge
Old Page
T3
®
Bank x
Integrated Microprocessor User’s Manual, Rev. 3
Figure
T4
and
Figure
9-11, after the SDRAM determines that this is a page
Figure
New Page
T5
Activate
Bank y
Row
Row
9-9.
9-10, the write operations require one cycle to
T6
T7
Write
Data
1
Col
T8
Write
Data
2
Col
Bank y
Freescale Semiconductor
T9
Write
Data
3
Col
T10
Write
Data
4
Col
T11