Freescale Semiconductor
MPC885EC
Rev. 3, 07/2004
MPC885/MPC880
Hardware Specifications
This hardware specification contains detailed information on
power considerations, DC/AC electrical characteristics, and AC
timing specifications for the MPC885/MPC880 (refer to
Table 1
for the list of devices). The MPC885 is the superset device of the
MPC885/MPC880 family. The CPU on the MPC885/MPC880 is
a 32-bit PowerPC™ core that incorporates memory management
units (MMUs) and instruction and data caches and that
implements the PowerPC instruction set.
1
Overview
The MPC885/880 is a versatile single-chip integrated
microprocessor and peripheral combination that can be used in a
variety of controller applications and communications and
networking systems. The MPC885/MPC880 provides enhanced
ATM functionality, an additional fast Ethernet controller, a USB,
and an encryption block.
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Contents
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Maximum Tolerated Ratings . . . . . . . . . . . . . . . . . . . 9
Thermal Characteristics . . . . . . . . . . . . . . . . . . . . . . 10
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
DC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Thermal Calculation and Measurement . . . . . . . . . . 12
Power Supply and Power Sequencing . . . . . . . . . . . 14
Layout Practices . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Bus Signal Timing . . . . . . . . . . . . . . . . . . . . . . . . . . 15
IEEE 1149.1 Electrical Specifications . . . . . . . . . . . 44
CPM Electrical Characteristics . . . . . . . . . . . . . . . . . 46
UTOPIA AC Electrical Specifications . . . . . . . . . . . 69
FEC Electrical Characteristics . . . . . . . . . . . . . . . . . 71
Mechanical Data and Ordering Information . . . . . . . 75
Document Revision History . . . . . . . . . . . . . . . . . . . 89
© Freescale Semiconductor, Inc., 2004. All rights reserved.
Features
Table 1
shows the functionality supported by the members of the MPC885 family.
Table 1. MPC885 Family
Cache
Part
I Cache
MPC885
MPC880
8 Kbyte
8 Kbyte
D Cache 10BaseT
8 Kbyte
8 Kbyte
Up to 3
Up to 2
10/100
2
2
3
2
2
2
1
1
Serial ATM and
UTOPIA interface
Serial ATM and
UTOPIA interface
Ethernet
SCC
SMC
USB
ATM Support
Security
Engine
Yes
No
2
Features
The MPC885/880 is comprised of three modules that each use the 32-bit internal bus: a MPC8xx core, a system
integration unit (SIU), and a communications processor module (CPM).
The following list summarizes the key MPC885/880 features:
•
•
Embedded MPC8xx core up to 133 MHz
Maximum frequency operation of the external bus is 80 MHz (in 1:1 mode)
— The 133-MHz core frequency supports 2:1 mode only.
— The 66-/80-MHz core frequencies support both the 1:1 and 2:1 modes.
Single-issue, 32-bit core (compatible with the PowerPC architecture definition) with thirty-two 32-bit
general-purpose registers (GPRs)
— The core performs branch prediction with conditional prefetch and without conditional execution.
— 8-Kbyte data cache and 8-Kbyte instruction cache (see
Table 1)
– Instruction cache is two-way, set-associative with 256 sets in 2 blocks
– Data cache is two-way, set-associative with 256 sets
– Cache coherency for both instruction and data caches is maintained on 128-bit (4-word) cache
blocks.
– Caches are physically addressed, implement a least recently used (LRU) replacement algorithm, and
are lockable on a cache block basis.
— MMUs with 32-entry TLB, fully associative instruction and data TLBs
— MMUs support multiple page sizes of 4, 16, and 512 Kbytes, and 8 Mbytes; 16 virtual address spaces
and 16 protection groups
— Advanced on-chip emulation debug mode
Provides enhanced ATM functionality found on the MPC862 and MPC866 families and includes the
following:
— Improved operation, administration and maintenance (OAM) support
— OAM performance monitoring (PM) support
— Multiple APC priority levels available to support a range of traffic pace requirements
— Port-to-port switching capability without the need for RAM-based microcode
— Simultaneous MII (100BaseT) and UTOPIA (half- or full -duplex) capability
— Optional statistical cell counters per PHY
•
•
MPC885/MPC880 Hardware Specifications, Rev. 3
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Freescale Semiconductor
Features
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•
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•
— UTOPIA L2-compliant interface with added FIFO buffering to reduce the total cell
transmission time and multi-PHY support. (The earlier UTOPIA L1 specification is also
supported.)
— Parameter RAM for both SPI and I
2
C can be relocated without RAM-based microcode
— Supports full-duplex UTOPIA master (ATM side) and slave (PHY side) operations using a split
bus
— AAL2/VBR functionality is ROM-resident.
Up to 32-bit data bus (dynamic bus sizing for 8, 16, and 32 bits)
32 address lines
Memory controller (eight banks)
— Contains complete dynamic RAM (DRAM) controller
— Each bank can be a chip select or RAS to support a DRAM bank.
— Up to 30 wait states programmable per memory bank
— Glueless interface to DRAM, SIMMS, SRAM, EPROMs, Flash EPROMs, and other memory
devices
— DRAM controller programmable to support most size and speed memory interfaces
— Four CAS lines, four WE lines, and one OE line
— Boot chip-select available at reset (options for 8-, 16-, or 32-bit memory)
— Variable block sizes (32 Kbyte–256 Mbyte)
— Selectable write protection
— On-chip bus arbitration logic
General-purpose timers
— Four 16-bit timers or two 32-bit timers
— Gate mode can enable/disable counting.
— Interrupt can be masked on reference match and event capture
Two fast Ethernet controllers (FEC)—Two 10/100 Mbps Ethernet/IEEE 802.3 CDMA/CS that
interface through MII and/or RMII interfaces
System integration unit (SIU)
— Bus monitor
— Software watchdog
— Periodic interrupt timer (PIT)
— Clock synthesizer
— Decrementer and time base
— Reset controller
— IEEE 1149.1 test access port (JTAG)
Security engine is optimized to handle all the algorithms associated with IPsec, SSL/TLS, SRTP,
802.11i, and iSCSI processing. Available on the MPC885, the security engine contains a
crypto-channel, a controller, and a set of crypto hardware accelerators (CHAs). The CHAs are:
— Data encryption standard execution unit (DEU)
– DES, 3DES
– Two key (K1, K2, K1) or three key (K1, K2, K3)
– ECB and CBC modes for both DES and 3DES
MPC885/MPC880 Hardware Specifications, Rev. 3
Freescale Semiconductor
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Features
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•
— Advanced encryption standard unit (AESU)
– Implements the Rinjdael symmetric key cipher
– ECB, CBC, and counter modes
– 128-, 192-, and 256- bit key lengths
— Message digest execution unit (MDEU)
– SHA with 160- or 256-bit message digest
– MD5 with 128-bit message digest
– HMAC with either algorithm
— Crypto-channel supporting multi-command descriptor chains
— Integrated controller managing internal resources and bus mastering
— Buffer size of 256 bytes for the DEU, AESU, and MDEU, with flow control for large data sizes
Interrupts
— Six external interrupt request (IRQ) lines
— 12 port pins with interrupt capability
— 23 internal interrupt sources
— Programmable priority between SCCs
— Programmable highest priority request
Communications processor module (CPM)
— RISC controller
— Communication-specific commands (for example,
GRACEFUL STOP TRANSMIT
,
ENTER HUNT MODE
, and
RESTART TRANSMIT
)
— Supports continuous mode transmission and reception on all serial channels
— 8-Kbytes of dual-port RAM
— Several serial DMA (SDMA) channels to support the CPM
— Three parallel I/O registers with open-drain capability
On-chip 16
×
16 multiply accumulate controller (MAC)
— One operation per clock (two-clock latency, one-clock blockage)
— MAC operates concurrently with other instructions
— FIR loop—Four clocks per four multiplies
Four baud rate generators
— Independent (can be connected to any SCC or SMC)
— Allow changes during operation
— Autobaud support option
Up to three serial communication controllers (SCCs) supporting the following protocols:
— Serial ATM capability on SCCs
— Optional UTOPIA port on SCC4
— Ethernet/IEEE 802.3 optional on the SCC(s) supporting full 10-Mbps operation
— HDLC/SDLC
— HDLC bus (implements an HDLC-based local area network (LAN))
— Asynchronous HDLC to support point-to-point protocol (PPP)
MPC885/MPC880 Hardware Specifications, Rev. 3
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Freescale Semiconductor
Features
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— AppleTalk
— Universal asynchronous receiver transmitter (UART)
— Synchronous UART
— Serial infrared (IrDA)
— Binary synchronous communication (BISYNC)
— Totally transparent (bit streams)
— Totally transparent (frame based with optional cyclic redundancy check (CRC))
Up to two serial management channels (SMCs) supporting the following protocols:
— UART (low-speed operation)
— Transparent
— General circuit interface (GCI) controller
— Provide management for BRI devices as GCI controller in time-division multiplexed (TDM)
channels
Universal serial bus (USB)—Supports operation as a USB function endpoint, a USB host controller,
or both for testing purposes (loop-back diagnostics)
— USB 2.0 full-/low-speed compatible
— The USB function mode has the following features:
– Four independent endpoints support control, bulk, interrupt, and isochronous data transfers.
– CRC16 generation and checking
– CRC5 checking
– NRZI encoding/decoding with bit stuffing
– 12- or 1.5-Mbps data rate
– Flexible data buffers with multiple buffers per frame
– Automatic retransmission upon transmit error
— The USB host controller has the following features:
– Supports control, bulk, interrupt, and isochronous data transfers
– CRC16 generation and checking
– NRZI encoding/decoding with bit stuffing
– Supports both 12- and 1.5-Mbps data rates (automatic generation of preamble token and data
rate configuration). Note that low-speed operation requires an external hub.
– Flexible data buffers with multiple buffers per frame
– Supports local loop back mode for diagnostics (12 Mbps only)
Serial peripheral interface (SPI)
— Supports master and slave modes
— Supports multiple-master operation on the same bus
Inter-integrated circuit (I
2
C) port
— Supports master and slave modes
— Supports a multiple-master environment
Time-slot assigner (TSA)
— Allows SCCs and SMCs to run in multiplexed and/or non-multiplexed operation
— Supports T1, CEPT, PCM highway, ISDN basic rate, ISDN primary rate, user defined
MPC885/MPC880 Hardware Specifications, Rev. 3
Freescale Semiconductor
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