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Semiconductor Group
330
09.98
PEB 22554
Operational Description T1 / J1
Port Configuration 1-4 (Read/Write)
Value after RESET: 00
H
RPC2 ...0…
Receive multifunction port configuration
The multifunction ports RP(A-D) are bidirectional. After Reset these
ports are configured as inputs. With the selection of the pin function
the In/Output configuration is also achieved. The input function SYPR
may only be selected once, it should not be selected twice or more.
Register PC1 configures port RPA,while PC2 --> port RPB,
PC3 --> port RPC and PC4 --> port RPD.
000…SYPR: Synchronous Pulse Receive (Input)
Together with register RC1/0 SYPR defines the frame begin on
the receive system interface. Because of the offset
programming the SYPR and the RFM pin function could not be
selected in parallel.
001…RFM : Receive Frame Sync (Output)
CMR2.IRSP = 0: This receive frame marker could be active
high for a 1.544 MHz or 2.048 MHz period during any bit
position of the current frame. Programming is done with
registers RC1/0. The internal time-slot assigner is disabled.
CMR2.IRSP = 1: Internal generated frame synchronization
pulse generated by the DCO-R circuitry. Together with
registers RC1/0 the frame begin on the receive system
interface is defined. This frame synchronization pulse is active
low 1.544 MHz or 2.048 MHz period.
010…RMFB : Receive Multiframe Begin (Output)
Marks the beginning of every received multiframe or optionally
every 12 frames (active high).
011…RSIGM : Receive Signaling Marker (Output)
Marks the time-slots which are defined by register RTR1-4 of
every frame at port RDO. Optionally in CAS-BR applications
the robbed bits are marked every six frames.
7
0
PC1
RPC2
RPC1
RPC0
XPC2
XPC1
XPC0
(x80)
PC2
RPC2
RPC1
RPC0
XPC2
XPC1
XPC0
(x81)
PC3
RPC2
RPC1
RPC0
XPC2
XPC1
XPC0
(x82)
PC4
RPC2
RPC1
RPC0
XPC2
XPC1
XPC0
(x83)