MPC852TADS Freescale Semiconductor, MPC852TADS Datasheet - Page 77

• Manufacturer Part Number: MPC852TADS
• Description: Networking Modules & Development Tools ADS BOARD FOR 852
• Manufacturer: Freescale Semiconductor
• Type: Network Controller & Processorr

Specifications of MPC852TADS

• Memory Type: Flash, SDRAM
• Interface Type: RS-232, Ethernet, PCMCIA
• Operating Voltage: 1.8 V to 3.3 V
• Operating Temperature Range: 0 C to + 30 C
• Board Size: 233 mm x 150 mm
• Product: Modules
• For Use With/related Products: MPC852T
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

65
A. 3.3 V required for full speed. Internal logic may be powered by a 2V bus for reduced performance levels.
B. 12V necessary only for the PCMCIA card and the Flash SIMM.
4•14•1
Some ADS peripherals reside on the 5V bus. The MPC, however, is not 5V compatible. Consequently 3.3V to 5V
buffers were added between the MPC and the 5V devices in order that the MPC may operate 5V levels on its lines
without damage. The 5V bus is connected via a fuse (5A) to an external power connector.
To forestall reverse-voltage or over-voltage being applied to the 5V inputs, a set of high-current diodes and a zener
diode were connected between the 5V bus and the GND.
4•14•2
The MPC and SDRAM as well as the address and data buffers are powered by a 3.3V
using Micrel’s special low-voltage drop / linear voltage regulator, the MIC29500-3.3BT. This device is capable of
driving a fuse of up to 5A as well as facilitating operation of external logic.
4•14•3
The sole purpose of the 12V bus is to supply VPP (programming voltage) to the PCMCIA card and the Flash SIMM
The 12V bus is connected to a dedicated input connector via a fuse (1A) and is protected from over / reverse voltage
application. If the 12V supply is not required for either the PC Card or the Flash SIMM then 12V input to the ADS
may be omitted.
5V Bus
3.3V Bus
12V Bus
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
Functional Description
MPC852TADS - User’s Manual
A
bus produced from a 5V bus
Release 1.0
B
.