PEB22554 SIEMENS [Siemens Semiconductor Group], PEB22554 Datasheet - Page 122

• Manufacturer Part Number: PEB22554
• Description: ICs for Communications
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

Receive Control 1 (Read/Write)
Value after RESET: 9C
RC1
RCO7…RCO0… Receive Offset / Receive Frame Marker Offset
Semiconductor Group
7
RCO7
Depending on the RP(A-D) pin function different offsets could be
programmed. The SYPR and the RFM pin function could not be
selected in parallel.
Receive Offset (PC(1-4).RPC(2-0) = 000)
Initial value loaded into the receive bit counter at the trigger edge of
SCLKR when the synchronous pulse at port SYPR is active (see
figure 17 ).
Calculation of delay time T (SCLKR cycles) depends on the value X
of the „Receive Offset“ register RC1/0:
0
5 T
with max. delay = (256*SC/SD) -1
with SC = System clock defined by SIC1.SSC1/0
with SD = 2.048 MHz
Delay time T = time between beginning of time-slot 0 at RDO and the
initial edge of SCLKR after SYPR goes active.
Receive Frame Marker Offset (PC(1-4).RPC(2-0) = 001)
Offset programming of the receive frame marker which is output on
multifunction port RFM. The receive frame marker could be activated
during any bit position of the entire frame and depends on the
selected system clock rate.
Calculation of the value X of the „Receive Offset“ register RC1/0
depends on the bit position BP which should be marked :
0
2046
e.g: 2.048 MBit/s: BP = 0-255; .... 16.384 MBit/s: BP = 0-2047
T
BP
H
max. delay : X= 2052 - T
BP 2047 :
4 :
2045 :
X= 4- T
X = BP + 2
X= BP - 2046 )
122
Operational Description E1
0
RCO0
PEB 22554
(x25)
09.98