TWR-MEM Freescale Semiconductor, TWR-MEM Datasheet - Page 4

• Manufacturer Part Number: TWR-MEM
• Description: MEMORY MODULE FOR TWR SYSTEM
• Manufacturer: Freescale Semiconductor

Specifications of TWR-MEM

• Accessory Type: Memory Extension Card
• Product: Microcontroller Modules
• Data Bus Width: 8 bit
• Interface Type: JTAG, SPI
• Flash: 1 MB
• Operating Supply Voltage: 3.3 V
• Silicon Manufacturer: Freescale
• Core Architecture: Coldfire
• Core Sub-architecture: Coldfire V1, Coldfire V2, Coldfire V3
• Silicon Core Number: MCF51, MCF52, MCF53
• Rohs Compliant: Yes
• For Use With/related Products: Freescale Tower System
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

1 Overview
The Tower Memory Module (TWR-MEM) adds external memory and expansion I/O card support to the
Tower System. It can be used with a wide variety of Tower Processor Modules with an SPI and/or
external bus interface (EBI).
The TWR-MEM features a Serial Flash device, MRAM device, SD™ Card slot, and CompactFlash® slot. A
CPLD is used to interface between the external bus interface (memory bus) of the host processor and
the CompactFlash slot. This CPLD can also be used to prototype custom interfaces. A block diagram
for the TWR-MEM is shown in the figure below.
2 Reference Documents
The documents listed below should be referenced for more information on the Freescale Tower
system and the TWR-MEM. Refer to
Tower documentation.
External Connectors
(512 KB)
MRAM
(1 MB)
Flash
SPI
SPI0
Interface IC
Figure 1. TWR-MEM Block Diagram
http://www.freesale.com/tower
Tower Secondary Elevator Connector
Tower Primary Elevator Connector
TWR-MEM User’s Manual
Memory Device
Power
Spare I/O
for the latest revision of all
SPI1, IRQ, GPIO
CPLD
JTAG
Page 4 of 11
CompactFlash
SD Card
Socket
Socket
3.3V