Overview
MPC8260 PowerQUICC II Family Reference Manual, Rev. 2
1-4 Freescale Semiconductor
– Transparent
UART (low-speed operation)
One serial peripheral interface identical to the MPC860 SPI
One I2C controller (identical to the MPC860 I2C controller)
Microwire compatible
Multiple-master, single-master, and slave modes
Up to eight TDM interfaces (four on the MPC8250 and the MPC8255)
Supports two groups of four TDM channels for a total of eight TDMs (one group of four on
the MPC8250 and the MPC8255)
2,048 bytes of SI RAM
Bit or byte resolution
Independent transmit and receive routing, frame synchronization.
Supports T1, CEPT, T1/E1, T3/E3, pulse code modulation highway, ISDN basic rate, ISDN
primary rate, Freescale interchip digital link (IDL), general circuit interf ace (GCI), and
user-defined TDM serial interfaces
E ight transfer transmission convergence (TC) layers between the TDMs and FCC2 to support
inverse multiplexing for ATM capabilities (IMA) (MPC8264 and MPC8266 only)
E ight independent baud rate generators and 20 input clock pins for supplying clocks to FCC,
SCC, and SMC serial channels
Four independent 16-bit timers that can be interconnected as two 32-bit timers
TC layer (MPC8264 and MPC8266 only)
E ach of the 8 TDM channels is routed in hardware to a TC layer block
Protocol-specific overhead bits may be discarded or routed to other controllers by the SI
Performing ATM TC layer functions (according to ITU-T I.432)
Transmit (Tx) updates
Cell HEC generation
Payload scrambling using self synch ronizing scrambler (programmable by the
user)
Coset generation (programmable by the user)
Cell rate by inserting idle/unassign ed cells
Receive (Rx) updates
Cell delineation using bit by bit HEC checking and programmable ALPHA and
DELTA parameters for the delineation state machine
Payload descrambling using self syn chronizing scrambler (programmable by the
user)
Coset removing (programmable by the user)
Filtering idle/unassigned cells (programmable by the user)