Physical Layer Interface Controller (PLIC)
MCF5272 ColdFire Integrated Microprocessor User’s Manual, Rev. 3
13-2
Freescale Semiconductor
Figure 13-1. PLIC System Diagram
The four ports have the following timing and connectivity features:
Port 0: Connects through pin set 0. Operates as a slave-only port; that is, an external device must
source frame sync clock/frame sync receive (FSC/FSR) and data clock (DCL). These pins are
unidirectional inputs. Din0 and Dout0 are dedicated pins for port 0.
Port 1: Connects through pin set 1. Operates as a master or slave port. In slave mode an external
device must source FSC/FSR and DCL. In master mode, DCL1 and FSC1/FSR1 are outputs. These
signals are in turn derived from the DCL0 and FSC/FSR from port 0. For port 1 to function in
master mode, port 0 must be enabled with an external transceiver sourcing DCL and FSC/FSR. The
physical interface pins Din1 and Dout1 serve ports 1, 2, and 3.
Port 2: Connects through pin set 1. Operates as a slave-only port. Port 2 shares a data clock with
port 1: DCL1 when port 1 is in slave mode or GDCL when port 1 is in master mode. A delayed
frame sync, DFSC2, derived from FSC1, is connected to the DFSC2 output and fed to the port 2
IDL/GCI block. Users can synchronize the port 2 IDL/GCI block with an offset frame sync, (offset
with respect to the port 1 GCI/IDL block), by programming the port 2 sync delay register, P2SDR.
Port 3: Connects through pin set 1 or 3. Operates as a slave-only port. Port 3 shares a data clock
with port 1: DCL1 when port 1 is in slave mode, or GDCL, when port 1 is in master mode. A
delayed frame sync, DFSC3, is derived from FSC1 and is fed to the port 3 IDL/GCI block.
Programming the port 3 sync delay register, P3SDR, allows it to be synchronized with an offset
Internal Interface Registers
Port 1
Port 2
Port 3
Pin Set 1 Mux
GCI/IDL
Pin Set 3
Mux
Timing
Gen
Timing
Gen
Timing
Gen
Port 0
GCI/IDL
Pin Set 0
PA8/FSC0/FSR0, PA9/DGNT0,
DCL0/URT1_CLK, DIN0/URT1_RxD,
DOUT0/URT1_TxD, PA10/DREQ0
Pin Set 1
FSC1/FSR1/DFSC1,
DCL1/GDCL1_OUT, PA14,
PA15_INT6/DGNT1_INT6, DOUT1, DIN1
Pin Set 3
PA7/QSPI_CS3/DOUT3,
DIN3/INT4
DIN3
DOUT
Internal Bus
Timing
Generator
32