Renesas redefines 32-bit CISC market with large on-chip
RAM and Flash memory microcontrollers
Embedded World 2008 – 26th February 2008, Renesas Technology Europe today announced the
R32C/111 group of microcontrollers with on-chip flash memory and incorporating the R32C/100
high-performance 32-bit CPU core. The group consists of 12 models and is suitable for a wide
range of applications, including metering, industrial and consumer electronics. The R32C/100 series
is the top-level product series in the M16C Platform,*1 which is a CISC (Complex Instruction Set
Computer) microcontroller. The core is upward compatible with existing CPU cores in the platform,
and also provides improvements in operation processing performance, bus usage efficiency and
code efficiency.
The R32C/111 group has a maximum operating frequency of 50 MHz, which in combination with
improvements to the CPU core architecture, an overall processing performance of 42 DMIPS
executing code from embedded flash. It also incorporates an on-chip 32-bit multiplier, singleprecision
floating-point unit (FPU) and a 32-bit enhanced barrel shifter for dramatically improved
operation processing performance. An expanded, on-chip 64-bit memory bus has improved bus
efficiency.
The devices include a variety of on-chip peripheral functions, including a watchdog timer, highfunctionality
timers and four DMA controller channels. Additional features include nine free scalable
USART, 26 channels of 10-bit A/D converter, two 8-bit D/A converter channels, a CRC calculation
circuit for improved communication data reliability and an X-Y converter circuit supporting highspeed
rotation or enlargement of image data.
The R32C/111 uses the FlatRAM*2 approach. This gives a constant embedded RAM size,
whatever Flash size is chosen. The basis of FlatRAM is that communication stacks, using the
embedded RAM, do not shrink just because the flash demand goes down. The benefit of the
FlatRAM approach is that engineers can use largest Flash product in their development phase and
change later in mass production to the flash size most appropriate.
The embedded flash memory size is also free scalable with densities of 256kB, 384kB and 512kB.
Memory densities of up to 1MB within the R32C Group will follow later this year.
R32C/111 group products come in small 100-pin LQFP (14 mm × 14 mm) packages, which are the
same packages used for the M16C/62P and M32C/87 products.
“With the R32C/111 we can give system designers an interesting mix of a 32-bit CISC MCU with
high performance and an affordable, power-efficient industrial microcontrollers,” comments Bernd
Westhoff, product marketing manager, consumer and industrial business unit, Renesas Technology
Europe. “The large embedded RAM of 40kB or 63kB based on the FlatRAM philosophy, along with
a roadmap towards smaller pin count packages and higher integration of CAN, Ethernet and USB
brings a new unexpected freedom to engineers.”
Notes:
1. M16C Platform: A family of CISC microcontrollers, comprising a varied product lineup of 16-bit
and 32-bit products in the M16C Series, M32C Series and R32C Series. Features include highly
efficient C-language support, excellent noise characteristics, low power consumption, and
comprehensive on-chip peripheral functions. The range of low-end to high-end series featuring the
same architecture, pin assignment compatibility, and peripheral function upward-compatibility
provides support for a wide range of application areas, including the automotive, industrial, and
consumer fields.
2. FlatRAM: Exclusive to Renesas Technology, FlatRAM means constant embedded RAM size,
what ever embedded Flash size is chosen.
For further information please contact your local Sasco Holz Branch Office.
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