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For further information, including the SuperH DVD and SH/Tiny article and an
opportunity to win the Renesas HS7125EDB01H development board, please
complete the reply slip or visit http://www.arrowne.com/innov/in214/f_1393.shtml
14
MICROCONTROLLER
SOLUTIONS
Low-end motor control applications require increasingly
sophisticated control algorithms to squeeze improvements
in energy efficiency from the new generation of motors.
The SH/Tiny from Renesas is designed to meet these needs,
and to bring design advantages when compared to standard
digital signal processors.
The 50MHz SH/Tiny devices, designated DF7125xx50Fxx, have
been designed with a focus on the details of motor control;
Renesas believes that for this reason they represent a quantum leap
in the cost-performance ratio of low-end motor drives.
The MCUs are based on a simple, easily understood architecture,
which is optimised for C programming. Designers are supported
with a free optimising compiler that produces high-quality code.
Simplicity is also provided by the use of a single 5V power supply
with a typical run current of 52mA. The designer can therefore
employ a standard power supply in a standard package.
The SH/Tiny includes two channels of 10-bit, 5V A/D conversion,
providing improved noise resistance when compared with 3V
alternatives.
To enable safety features, the SH/Tiny has an internal watchdog
timer that will continue to run even if the external oscillator
stops. EMC behaviour is another important contributor to safe
operation: here the SH/Tiny offers best-in-class performance.
Renesas also provides free software routines to meet the IEC
60730-1 standard.
The heart of the SH/Tiny’s motor control capabilities is a specially
designed timer block, MTU2, that includes six channels of 16-bit
timers, supporting three-phase PWM capability with automatic
dead-time insertion and compensation. The devices also feature
a quadrature encoder feedback capability and a channel that can
measure actual dead times, enabling closed loop control for higher
motor efficiency.
Each of the two ADCs can be triggered by the MTU2 with an
additional, defined delay time to support algorithms such as single-
shunt motor drive. Port output-enable pins provide a hardware
connection to shut down the timer quickly and deterministically
when necessary.
Equipped with 8Kbyte SRAM and options of 128Kbyte, 64Kbyte
or 32Kbyte Flash, the SH/Tiny has very fast Flash programming and
erase times (1ms and 1.2s, respectively per 128bytes), which can
save significant cost in the production flow. The use of Renesas’
MONOS Flash technology allows the devices to run at full speed
without wait states.
The devices include three SCIs (Serial Communications Interfaces).
Package options are 64- or 48-pin LQFP or 52- or 64-pin QFN,
depending on precise configuration. Temperature range variants of
-20°C to +85°C or -40°C to +85°C are available.
Renesas are offering Arrow Innovation readers the chance to win a
HS7125EDB01H development board. Please complete the reply slip
or visit http://www.arrowne.com/innov/in214/f_1393.shtml.
Features
U 50MHz 32-bit RISC processors
U Dedicated MTU2 timer unit
- Six 16-bit timer channels
U Additional two-channel 16-bit timer
U Single 5V supply
U 8Kbyte SRAM
U 32Kbyte, 64Kbyte, 128Kbyte Flash variants
- Zero wait states
- Fast erase and programming functions
U C-programmable with free optimising compiler
U Two 10-bit 5V ADCs
U Watchdog timer
U Three SCIs
U Quadrature encoder input
U 64- or 48-pin LQFP; or 52- or 64-pin QFN
U Temperature range: -20°C to +85°C or -40°C to +85°C
Applications
U Low cost motor control
U Air conditioners
U Washing machines
U Refrigerators
U Vacuum cleaners
U Printers
U Office automation
U UPSs
U General purpose inverters
Integrated motor-control timer, zero-wait Flash and easy system development
A Quantum Leap in Low-End Motor Control
ENQUIRY 1393
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HS7125EDB01H
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