ST40RA
32-bit Embedded SuperH Device
DATASHEET
Integer & FP
execution units
JTAG
Debug
JTAG
UDI
Registers
Mailbox
24 data
SCIF
MMU
D Cache
MMU
I Cache
PIO
interface
SCIF
2 channel
control
5 channel
DMA
controller
Timer (TMU)
Real-time clock
Interrupt ctrl
Clock ctrl
PLLs
Cbus Bridge/
MPX
SuperHyway I/F
Coprocessor
EMI
SuperHyway
32 data
Flash
PCI I/F 66MHz
ST40 Local Memory I/F
32 data
PCI Peripherals
64 data
SDRAM
Peripherals
■ Memory protection and VM system support
Overview
● 64-entry unified TLB, 4-entry instruction TLB
● 4 Gbytes address space
The ST40RA is the first member of the ST40 family. Based
on the SH-4, SuperH CPU core from SuperH Inc, the
ST40RA is designed to work as a standalone device, or as
part of a two chip solution for application specific systems.
■ Standard ST40 peripherals
● 2 synchronous serial ports with FIFO (SCIF)
● Timers and a real-time clock
Example applications the ST40RA is designed for include
digital consumer, embedded communications, industrial
and automotive. The high connectivity of the ST40 through
its PCI bus and its dual memory uses makes it a versatile
device, ideal for data-intensive and high performance
applications.
IO devices
● Mailbox register for interprocessor communication
● Additional PIO
Bus interfaces
System features
■ Local memory interface SDRAM & DDR SDRAM
● Up to 100 MHz (1.6 Gbytes/s peak throughput)
■ PCI interface - 32-bit, 66/33 MHz, 3.3 V
■ Enhanced memory interface (EMI)
■ 32-bit SuperH CPU
● 64-bit hardware FPU (1.16 GFLOPS)
● 128-bit vector unit for matrix manipulations
● 166 MHz, 300 MIPS (DMIPS 1.1)
● Up to 664 Mbytes/s CPU bandwidth
● 32-bit bus, up to 83 MHz, for attaching peripherals
● High-speed, sync mode, burst flash ROM support
● SDRAM support
● Direct mapped, on-chip, ICache (8 Kbytes) and DCache
(16 Kbytes)
■ High-performance 5-channel DMA engine,
● MPX initiator and target interface
● Programmable MPX bus arbiter
supporting 1D or 2D block moves and linked lists
■ SuperHyway internal interconnect
● High throughput, low latency, split transaction packet
router
13 August 2003
ADCS7260755H
STMicroelectronics
1/94
STMICROELECTRONICS [ ST ]
