PEB20256EV21GXP Infineon Technologies, PEB20256EV21GXP Datasheet - Page 122

• Manufacturer Part Number: PEB20256EV21GXP
• Manufacturer: Infineon Technologies

Specifications of PEB20256EV21GXP

• Operating Supply Voltage (typ): 2.5/3.3V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Lead Free Status / Rohs Status: Compliant

PEB 20256 E
PEF 20256 E
Reset and Initialization procedure
their initialization in progress signal. The register bit CONF1.IIP is the result of all signals.
As soon as all internal modules have finished their RAM initialization the register bit
CONF1.IIP is deasserted. Software must poll the register bit CONF1.IIP until this bit has
been deasserted. Read access to registers other than CONF1 is prohibited and may
result in unexpected behavior of the design. Write accesses are not allowed.
Chip initialization is finished when CONF1.IIP is ‘0’.
Software Reset
Alternately the MUNICH256 provides the capability to issue a software reset via register
bit CONF1.SRST. During software reset all interfaces except PCI interface are forced
into their idle state. After software reset is set the MUNICH256 starts its self initialization
and IIP will be asserted. Chip initialization is finished when CONF1.IIP is deasserted.
Afterwards the software reset bit must be set to ‘0’ to allow further operation.
7.2
Mode Initialization
After chip initialization is finished the system software has to setup the device for the
required function.
The system software has to poll bit CONF1.IIP (FCONF.IIP). As soon as CONF1.IIP is
deasserted, the system software has to clear bit CONF1.STOP and has to set the
general operating modes in register CONF1.
The port mode has to be programmed. It is assumed, that port clocks are active
according to the selected port mode. The ports shall be disabled, thus no incoming data
is forwarded to the time slot assigner and the outputs are still tri-state.
Transmit direction
The ports have to enabled via register TEN. The transmit port synchronizes to the
external synchronization pulse. After a port has been enabled payload data is provided
from the time slot assigner. Since the time slot assignment is in reset state, that is all time
slots are set to inhibit, data bits are tri-state.
Receive direction
The ports have to be enabled via register REN. The receiver synchronizes to the external
synchronization pulse. As soon as frame synchronization has been achieved, incoming
payload data is passed to the time slot assigner. Since the time slot assignment is in the
reset state, that is all time slots are set to inhibit, data bits are discarded.
Data Sheet
122
04.2001