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MPC852T Hardware Specifications, Rev. 3.1
Freescale Semiconductor
3
Features
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)
Interrupts
— Seven external interrupt request (IRQ) lines
— Seven port pins with interrupt capability
— Eighteen 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
— 8 serial DMA (SDMA) channels
— Three parallel I/O registers with open-drain capability
Two baud rate generators
— Independent (can be connected toany SCC3/4 or SMC1)
— Allows changes during operation
— Autobaud support option
Two SCCs (serial communication controllers)
— Ethernet/IEEE 802.3 optional on SCC3 & SCC4, supporting full 10-Mbps operation
— HDLC/SDLC
— HDLC bus (implements an HDLC-based local area network (LAN))
— Universal asynchronous receiver transmitter (UART)
— Totally transparent (bit streams)
— Totally transparent (frame-based with optional cyclic redundancy check (CRC))
One SMC (serial management channels)
— UART
One SPI (serial peripheral interface)
— Supports master and slave modes
— Supports multimaster operation on the same bus
PCMCIA interface
— Master (socket) interface, release 2.1 compliant