MC68EN360AI25VL Freescale, MC68EN360AI25VL Datasheet - Page 298

• Manufacturer Part Number: MC68EN360AI25VL
• Manufacturer: Freescale

Specifications of MC68EN360AI25VL

• Family Name: M68000
• Device Core: ColdFire
• Device Core Size: 32b
• Frequency (max): 25MHz
• Instruction Set Architecture: RISC
• Operating Supply Voltage (max): 3.3V
• Operating Supply Voltage (min): 2.7V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 240
• Package Type: FQFP
• Lead Free Status / RoHS Status: Compliant

System Integration Module (SIM60)
If a larger system is required, the only additional glue logic that may be needed is external
buffers (see Figure 6-12). In this case, a boot EPROM and a flash EPROM are supported.
Also, two DRAM SIMMs are supported using RAS1 and RAS2.
Each of the eight memory banks may be used by an external master such as an
MC68EC040, MC68030, or even another QUICC. Whenever an external master accesses
DRAM, SRAM, or a peripheral within one of the regions of the memory banks, the memory
controller will control the access for that external master.
If DRAM is accessed by an external master, an external multiplexer must be provided. In
that case, the QUICC AMUX signal can be used to control the multiplexing. The DRAM con-
troller supports use by an MC68EC040 and another QUICC or MC68030-type device. In
such a case, the MC68EC040 and QUICC/MC68030-type device can access the DRAM in
different modes and at different rates. For instance, the MC68EC040 can access the DRAM
using two-clock bursts, while an external QUICC accesses the DRAM using page mode with
three-clock page hits, four-clock page normal, and five-clock page miss accesses. Thus, the
MC68EC040 access to DRAM is not slowed by the presence of other slower masters on the
system bus. In addition, the MC68EC040 is not slowed by the performance of the DRAM
accesses by the QUICC's internal bus masters (CPU32+, IDMAs, SDMAs, etc.) All
accesses may occur at different rates, with the MC68EC040 parameters being programmed
independently and the external QUICC/MC68030-type master being up to one wait state
6-54
Figure 6-11. Minimum QUICC System Configuration
MC68360
QUICC
PRTY3–PRTY0
Freescale Semiconductor, Inc.
CAS3–CAS0
For More Information On This Product,
ADDRESS
DATA
RAS1
WE0
CS0
R/W
OE
MC68360 USER’S MANUAL
Go to: www.freescale.com
CE (ENABLE)
OE (OUTPUT ENABLE)
WE (WRITE)
DATA
ADDRESS
(FLASH OR REGULAR)
RAS
CAS3–CAS0
W (WRITE)
DATA
ADDRESS
PARITY
(OPTIONAL PARITY)
16- OR 32-BIT
DRAM SIMM
8-BIT BOOT
EPROM