MPC852TADS Freescale Semiconductor, MPC852TADS Datasheet - Page 46

• 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

34
A. The Hard Reset button is not dedicated.
B. For FUTURE Use
The design details of the various modules comprising the MPC852TADS are described in this chapter.
4•1
The ADS has several reset sources:
4•1•1
The power on reset to the MPC852T initializes the processor state after power up. A dedicated logic, using Seiko S-
80828ANMP-EDR-T2, which is a voltage detector of 2.8V +/- 2%,
for a period of ~500msec. This time period is long enough to cover also for the stabilization, of the VDDL power
buses of the MPC852T, powered by different voltage regulators. It is assumed that the stabilization time for all linear
regulators (see also
Power On Reset may be generated manually as well by a dedicated push-button SW6.
4•1•2
A Soft Reset button has been provided in order to support application development in areas other than around the
debug port and resident debuggers. Pressing the SW3 button asserts the SRESET* pin of the MPC and generates a
Soft Reset sequence.
When SRESET~ is asserted to the MPC then the debug-port controller makes a Soft Reset configuration available to
the MPC. See
4•1•3
A Hard Reset button has been provided
debug port. Pressing the SW3 Soft Reset button in conjunction with the SW2 ABORT button asserts the HRESET*
line thus generating a HARD RESET sequence. In order to economize on board space the button sharing was devel-
oped. However, this does not in any way effect functionality.
When HRESET~ is asserted to the MPC then a Hard Reset configuration, via BCSR0, is made available. See
"Hard Reset Configuration"
4•1•4
Hardware Reset through on board Command Converter is implemented in Altera Logic.
When using Serial Transfer mode Reset should be send via DB3.
When using EPP transfer mode Reset should be send via nInit signal and then the Host computer should enter into
Reset & Reset - Configuration
1) Regular Power-On Reset
2) Manual Soft Reset
3) Manual Hard Reset
4) Host Hard Reset through on board command converter
5) MPC Internal Sources - see the appropriate Spec or U/M
Regular Power - On Reset
Manual Soft Reset
Manual Hard Reset
Host Hard Reset through on board command converter
4•1•6•3 "Soft Reset
4•14 "Power" on page
Freescale Semiconductor, Inc.
For More Information On This Product,
and
4 - Functional Description
TABLE 4-10. "BCSR0
Configuration".
Go to: www.freescale.com
A
Functional Description
in order to support application development in areas other than around the
MPC852TADS - User’s Manual
63)
is
about the same.
Description".
asserts
PORESET~ inputs to the MPC852T and
B
Release 1.0
4•1•6•2