TLCS-770 Family TLCS-770 Series

Digital signal processors (DSPs) capable of high-precision 3-phase motor control: Traditional electric power steering (EPS) control systems have implemented both system and motor control with a single main microcontroller. Toshiba has newly developed a DSP specifically optimized for automotive motor control. By separating system control and motor control functionalities, Toshiba offers a new two-chip solution for EPS systems that provides various advantages resulting from efficient control and flexibility, such as reduced power consumption due to lowered operating frequencies, future provisions for performance improvement, and ease of broadening application product lines.
The TMP77CM70TUG and TMP77FM70TUG are high-speed processors based on Toshiba’s proprietary 16-bit DSP core adopting Harvard architecture which allows an instruction and data to be read simultaneously.
These new products contain two units of AD converter for simultaneous conversion of two motor current waveforms and a 3-phase PWM output circuit with a minimum resolution of 25 ns. These features greatly contribute to improving performance of automotive motor applications, including an enhanced steering feel and reduced vibration in the car air conditioner compressor.

Datasheets

Motor drive at approximately half the system clock speed of RISC processors (Compared to Toshiba processors)

Contributes to enhanced EMI/EMS protection and reduced power consumption.
Separating motor control functionality promises future provisions for performance improvement.

Ease of broadening application product lines

The DSP is dedicated to motor control.
The system control microcontroller can be selected from general-purpose products.

Reduced system costs

Use of an optimized DSP and a less expensive general - purpose microcontroller enables a reduction in system costs.

Part Number	TMP77FM70TUG**	TMP77CM70TUG**
Type	Flash ROM	Mask ROM
Memory	ROM : 7 Kwords x 32 bits Data RAM : 512 words x 16 bits Coefficient ROM : 2 Kwords x 16 bits
I/O	18
Minimum instruction execution time	50 ns (internal : 20 MHz)
Operating voltage	Internal : 3.0 to 3.6 V, I/O : 4.5 to 5.5 V
Operating frequency	20 MHz (external : 10 MHz)
Motor control circuit (PMD)	Number of channels : 1 channel 3-phase PWM output (resolution : 25 ns) Dead time : 0.05 to 12.8 µs Protection feature : Emergency output stop
10-bit AD converter	4 channels x 2 units
Communication	UART/SIO (selectable) : 2 channels
Timer	16-bit timer : 2 channels Watchdog timer : 1 channel
Package	64-pin LQFP (10 x 10 mm, 0.5-mm pitch)