MC68EN302CAG20BT Freescale Semiconductor, MC68EN302CAG20BT Datasheet - Page 5

• Manufacturer Part Number: MC68EN302CAG20BT
• Description: IC MPU NETWORK 20MHZ 144-LQFP
• Manufacturer: Freescale Semiconductor

Specifications of MC68EN302CAG20BT

• Processor Type: M683xx 32-Bit
• Speed: 20MHz
• Voltage: 5V
• Mounting Type: Surface Mount
• Package / Case: 144-LQFP
• Family Name: M68000
• Device Core: ColdFire
• Device Core Size: 32b
• Frequency (max): 20MHz
• Instruction Set Architecture: RISC
• Supply Voltage 1 (typ): 5V
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 144
• Package Type: LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Lead Free Status / Rohs Status: Compliant

The MC68EN302 is intended for low-end bridge and router applications. It has the three SCCs from the
MC68302, plus an additional Ethernet interface giving it a total of four serial interfaces.
Since the MC68EN302 has both the three SCCs as well as an Ethernet interface, it would be an excellent
choice in an ISDN to Ethernet router.
For remote access dial-in, the MC68EN302 could be used in a dial-up modem that would connect to an
Ethernet LAN.
• Programmable refresh period and pre-charge period
• RAS lines are separate from the four chip selects
• Refresh hidden from bus accesses
• Write protect option
• Each bank programmable size from 128Kbytes to 8Mbytes
• Low End Bridges
CLK
ADDRESS 23–ADDRESS 0
ADDRESS
RFRESH
DECODE
TIMER
Freescale Semiconductor, Inc.
MC68EN302 APPLICATIONS
For More Information On This Product,
MC68EN302 PRODUCT INFORMATION
Figure 4. DRAM Controller
LDS
UDS
R/W
Go to: www.freescale.com
AS
BLOCKHIT0
BLOCKHIT1
GENERATION
MULTIPLEXING
RAS/CAS
ADDRESS
RAS1, RAS0
CAS1, CAS0
DRAM_RW
AMUX
DRAM ADDRESS