PEF2256 datasheet(39/518 Pages) INFINEON

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FALC

®56

PEF 2256 H/E

External Signals

User’s Manual

DS1.1, 2003-10-23

Hardware Description

67 (D6)

68 (A6)

69 (B5)

70 (D5)

RPA

RPB

RBC

RPD

Receive Multifunction Ports

Depending on programming of bits

PC(1:4).RPC(3:0) these multifunction ports

carry information to the system interface or

from the system to the FALC

®56. After reset

these ports are configured to be inputs. With

the selection of the appropriate pin function,

the corresponding input/output configuration

is achieved automatically. Depending on bit

SIC3.RESR latching/transmission of data is

done with the rising or falling edge of SCLKR.

The same input function must not be selected

twice or more. Selectable pin functions are

described below.

IPU

Synchronous Pulse Receive (SYPR)

PC(1:4).RPC(3:0) = 0000

Together with the values of registers RC(1:0)

this signal defines the beginning of time slot 0

on system highway port RDO. Only one

multifunction port may be selected as SYPR

input. After reset, SYPR of port A is used, the

other lines are ignored. SYPR cannot be used

in combination with RFM. The pulse cycle is

an integer multiple of 125

µs.

Table 4

Pin Definitions - System Interface (cont’d)

Pin or

Ball No.

Name

Type

Buffer

Type

Function

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