MPC860T PowerQUICC Key Features
– 100-Mbps 802.3 media-independent interface (MII)
– 10-Mbps 802.3 media-independent interface
– 10-Mbps 7-wire interface
— Support for half-duplex 100-Mbps operation (at 33-MHz system clock rate and above)
— Support for full-duplex 100-Mbps operation (at 50-MHz system clock rate and above)
— Large on-chip transmit and receive FIFOs to support a variety of bus latencies
— Retransmission from transmit FIFO following a collision
— Automatic internal flushing of the receive FIFO for runts and collisions
— Off-chip buffer descriptor rings of user-definable size that allow nearly unlimited flexibility in
management of transmit and receive buffer memory
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10/100-Mbps media access control (MAC) features
— Address recognition
– Broadcast
– Single station address
– Promiscuous mode
– Multicast hashing
— Full support of the media-independent interface
— Interrupt modes
– Per-frame
– Per-buffer (selectable buffer interrupt functionality using the I bit is not supported)
— Automatic interrupt vector generation for receive and transmit events
Categories: transmit interrupt, receive interrupt, non-time critical interrupt
— Ethernet channel bursts data to/from external memory
Embedded MPC860T Core with 87 MIPS at 66 MHz (using Dhrystone 2.1)
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— Single-issue, 32-bit version of the embedded MPC860T Core (fully compatible with the
PowerPC user instruction set architecture; refer to the Programming Environments Manual for
32-Bit Implementations of the PowerPC Architecture, REV 2(MPCFPE32B/AD) for more
information) with 32- x 32-bit fixed-point registers
– Embedded core performs branch folding and branch prediction with conditional prefetch,
but without conditional execution
– 4-Kbyte data cache and 4-Kbyte instruction cache, each with an MMU
– Instruction and data caches are two-way, set associative, physical address, 4-word line
burst, least recently used (LRU) replacement, lockable on cache line granularity
– MMUs with 32-entry, fully-associative instruction and data TLBs
– MMUs support multiple page sizes of 4 Kbytes, 16 Kbytes, 256 Kbytes, 512 Kbytes, and
8 Kbytes; 16 virtual address spaces and 8 protection groups
– Advanced on-chip-emulation debug mode
— Up to 32-bit data bus (dynamic bus sizing of 8, 16, and 32 bits provided through memory
controller)
— 32 address lines
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MPC860TPowerQUICC™TechnicalSummary
MOTOROLA