MPC852TADS Freescale Semiconductor, MPC852TADS Datasheet - Page 29

• 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

17
A. Crystal resonator is not assembled on board.
3•1
Information necessary for using the MPC852TADS in both host-controlled and standalone configurations is detailed
in this chapter. The information includes controls and indicators, memory map details and board software
initialization.
3•2
The MPC852TADS features the switches and indicators noted in the following sub-sections.
3•2•1
The SW2 ABORT switch is used for aborting program execution. This is done by issuing a level 0 interrupt to the
MPC. There is no resident debugger with the MPC852TADS. As such, if the ADS is in standalone mode, it is the
users responsibility to provide a means of handling the interrupt. The Abort switch signal is debouncing and cannot
be disabled by software.
3•2•2
The SW3 SOFT RESET switch performs Soft Reset on the MPC internal modules while maintaining MPC
configuration (clock & chip-select) Dram and SDram contents. The switch signal is debouncing and cannot be
disabled by software. Upon completion of the Soft Reset sequence, the Soft Reset configuration is sampled prior to
becoming valid.
3•2•3
When both the SW2 and SW3 switches are depressed simultaneously then HARD RESET is generated on the MPC.
When the MPC undergoes Hard Reset it must be re initialized as its configuration is lost - including data stored in the
DRAM or SDRAM. Upon completion of the Hard Reset sequence, the Hard Reset configuration stored in BCSR0
becomes valid.
3•2•4
The on board clock source for the MPC is selected by SW4. The on-board 10MHz crystal resonator
between EXTAL and XTAL MPC pins, becomes the clock source when SW4[1-2] = [’ON’,’ON’] or [’ON’,’OFF’]
and the ADS is powered-up. However, when SW4[1-2] = [’OFF’,’ON’] or [’OFF’,’OFF’] but the ADS is powered-
up, then the on-board 10MHz clock generator connected to EXTCLK MPC pin, becomes the clock source. Clkout is
calculated by CLK_IN, 10MHz, multiplied by the PLL multiplication factor. See
DPLL Configuration" on page
3•2•5
The SW5 SOFTWARE OPTIONS switch is a 4-switch DIP switch. The SW5 is connected over SWOPT(0:3) lines
available at BCSR. Software options may be manually selected according to the state of the SW5.
3•2•6
The Power-On RESET switch SW6 performs Power-On reset to the MPC852T, as if the power was re-applied to the
INTRODUCTION
CONTROLS AND INDICATORS
ABORT Switch, SW2
SOFT RESET Switch, SW3
HARD RESET Switches, SW2 & SW3
Modin Selection, SW4
Software Options Switch, SW5
Power-On RESET Switch, SW6
3 - OPERATING INSTRUCTIONS
Freescale Semiconductor, Inc.
For More Information On This Product,
9.
OPERATING INSTRUCTIONS
Go to: www.freescale.com
MPC852TADS - User’s Manual
TABLE 2-1. "Power ON Reset
Release 1.0
A
connected