XPC850DSLZT50BU

XPC850DSLZT50BU Allgemeine Beschreibung

The XPC850DSLZT50BU microprocessor from Freescale Semiconductor stands out as a PowerQUICC chip designed for embedded systems that demand a blend of performance and power efficiency. Operating at a clock speed of 50 MHz, this processor strikes a balance that caters to applications requiring moderate processing power. Its incorporation of peripherals like UARTs, timers, and I/O interfaces offers system designers a versatile platform for crafting tailored solutions. The 'DSL' indication within the product code signifies support for DDR SDRAM interfaces, providing a boost to memory bandwidth and enhancing data processing speeds. On the other hand, the 'ZT' likely represents unique features or variations that differentiate this microprocessor within its product lineup

Funktionen

The following list summarizes the key MPC860 features:

Embedded single-issue, 32-bit MPC8xx core (implementing the PowerPC architecture) with thirty-two 32-bit general-purpose registers (GPRs)

The core performs branch prediction with conditional prefetch, without conditional execution

4- or 8-Kbyte data cache and 4- or 16-Kbyte instruction cache (see Table 1)

16-Kbyte instruction caches are four-way, set-associative with 256 sets;

4-Kbyte instruction caches are two-way, set-associative with 128 sets.

8-Kbyte data caches are two-way, set-associative with 256 sets; 4-Kbyte data caches are two-way, set-associative with 128 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.

Instruction and data caches are two-way, set-associative, physically addressed, LRU replacement, and lockable on-line granularity.

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

Up to 32-bit data bus (dynamic bus sizing for 8, 16, and 32 bits)

32 address lines

Operates at up to 80 MHz

Memory controller (eight banks)

Contains complete dynamic RAM (DRAM) controller

Each bank can be a chip select or RASto support a DRAM bank

Up to 15 wait states programmable per memory bank

Glueless interface to DRAM, SIMMS, SRAM, EPROM, Flash EPROM, and other memory devices.

DRAM controller programmable to support most size and speed memory interfaces

Four CASlines, four WElines, one OEline

Boot chip-select available at reset (options for 8-, 16-, or 32-bit memory)

Variable block sizes (32 Kbyte to 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

System integration unit (SIU)

Bus monitor

Software watchdog

Periodic interrupt timer (PIT)

Low-power stop mode

Clock synthesizer

Three parallel I/O registers with open-drain capability

Four baud-rate generators (BRGs)

Independent (can be connected to any SCC or SMC)

Allow changes during operation

Autobaud support option

Four serial communications controllers (SCCs)

Ethernet/IEEE 802.3 optional on SCC14, supporting full 10-Mbps operation (available only on specially programmed devices).

HDLC/SDLC(all channels supported at 2 Mbps)

HDLC bus (implements an HDLC-based local area network (LAN))

Asynchronous HDLC to support PPP (point-to-point protocol)

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))

Two SMCs (serial management channels)

UART

Transparent

General circuit interface (GCI) controller

Can be connected to the time-division multiplexed (TDM) channels

One SPI (serial peripheral interface)

Supports master and slave modes

Supports multimaster operation on the same bus

One I2C (inter-integrated circuit) port

Supports master and slave modes

Multiple-master environment support

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

1- or 8-bit resolution

Allows independent transmit and receive routing, frame synchronization, clocking

Allows dynamic changes

Can be internally connected to six serial channels (four SCCs and two SMCs)

Parallel interface port (PIP)

Centronics interface support

Supports fast connection between compatible ports on the MPC860 or the MC68360

PCMCIA interface

Master (socket) interface, release 2.1 compliant

Supports two independent PCMCIA sockets

Eight memory or I/O windows supported

Low power support

Full onall units fully powered

Dozecore functional units disabled, except time base decrementer, PLL, memory controller, RTC, and CPM in low-power standby

Sleepall units disabled, except RTC and PIT, PLL active for fast wake up

Deep sleepall units disabled including PLL, except RTC and PIT

Power down mode all units powered down, except PLL, RTC, PIT, time base, and decrementer

Debug interface

Eight comparators: four operate on instruction address, two operate on data address, and two operate on data

Supports conditions: =<>

Each watchpoint can generate a break-point internally

3.3 V operation with 5-V TTL compatibility except EXTAL and EXTCLK

357-pin ball grid array (BGA) package

Spezifikationen