MCF5407AI220 Freescale Semiconductor, MCF5407AI220 Datasheet - Page 298

• Manufacturer Part Number: MCF5407AI220
• Description: IC MPU 32B 220MHZ COLDF 208-FQFP
• Manufacturer: Freescale Semiconductor
• Series: MCF540xr

Specifications of MCF5407AI220

• Core Processor: Coldfire V4
• Core Size: 32-Bit
• Speed: 220MHz
• Connectivity: EBI/EMI, I²C, UART/USART
• Peripherals: DMA, WDT
• Number Of I /o: 16
• Program Memory Type: ROMless
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 3.6 V
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 208-FQFP
• Maximum Clock Frequency: 220 MHz
• Operating Supply Voltage: 1.8 V, 3.3 V
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: 0 C
• Program Memory Size: 24KB
• Cpu Speed: 220MHz
• Embedded Interface Type: I2C, UART
• Digital Ic Case Style: FQFP
• No. Of Pins: 208
• Supply Voltage Range: 3.3V
• Rohs Compliant: Yes
• For Use With: M5407C3 - KIT EVAL FOR MCF5407 W/ETHERNET
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Synchronous Operation
Figure 11-20 shows two read accesses in continuous page mode. Note that there is no
precharge between the two accesses. Also notice that the second cycle begins with a read
operation with no
Figure 11-21 shows a write followed by a read in continuous page mode. Because the bus
cycle is terminated with a
than after the read. A read requires data to be returned before the bus cycle can terminate.
Note that in continuous page mode, secondary accesses output the column address only.
11-30
Figure 11-20. Synchronous, Continuous Page-Mode Access—Consecutive Reads
RAS[0] or [1]
• If the next bus cycle is pending and hits in the page, the page is left open, and the
CAS[3:0]
DRAMW
D[31:0]
A[31:0]
CLKIN
SRAS
SCAS
next SDRAM access begins with a
of the internal CPU pipeline this condition does not occur often, however, the use of
continuous page mode is recommended because it can provide a slight performance
increase.
ACTV
ACTV
t
RCD
Row
= 2
NOP
command.
WRITE
READ
t
CASL
command, the second cycle begins sooner after the write
MCF5407 User’s Manual
= 2
Column
READ
NOP
or
WRITE
command. Because of the nature
READ
t
CASL
Column
= 2
NOP
t
NOP
EP
PALL