They have a floating point unit, 512k – 2Mbyte code flash and 32kB data flash with 100k write cycle endurance, and 228 to 256kbyte SRAM with parity, plus 2kbyte backup RAM.
Interface options include: Ethernet, CAN and USB 2.0 FS OTG with integrated PHY.
“The devices can allocate independent DMA and RAM for each peripheral circuit, and use a bus matrix circuit configuration that allows the bus master to transfer data,” according to the company. “As a result, the devices enable an Ethernet controller, CAN, and USB controller to be processed independently in parallel at the same time.”
There is also a serial memory interface that also supports Quad/Octal SPI, I2S audio interface (I2S), UART, FUART, TSPI and I2C – supported by a built-in three-unit DMA controller.
Sensing is supported by a 12bit ADC that allows individual sample and hold times to be set for each of its 16 – 24 input channels, then outputs include a dual-channel 8-bit DAC and motor control functions.
With the aim of supporting IEC60730 Class B functional safety certification, self-diagnosis is incorporated for ROM, RAM, ADC and clock.
The devices form Toshiba’s ‘M4N’ group. ” These devices further extend and enhance the TXZ+ family advanced class,” it said – see below to understand how its MCU nomenclature works.
“These types of microcontrollers are ideally suited for office equipment, building and factory automation applications, as well as being used in industrial networking and information management devices,” according to Toshiba. “Within the consumer space these devices are suited to IoT-based home appliances, home security and smart meters.”
Documentation, sample software (with use examples) and driver software for the peripheral interfaces are available for download. Evaluations boards and development environments are also available, from Arm ecosystem partners.
Operation is from 2.7 to 3.6V and packaging is LQFP or VFBGA (100 – 177 pins), and the product page is here
Toshiba’s product naming hierarchy – from an information request from Electronics Weekly in July
The branding hierarchy appears to be:
Family – Series – Group – Member (or Product or Device)
Toshiba said:
‘TXZ family’ is designed for a 65nm process and consist of:
M4K Group(1)
M4K Group(2)
Members of the TXZ family M4K Group(2) have been transferred to a 40nm process and called the TXZ+ family.
TXZ+ Family consists of two series (all on 40nm):
TXZ4A+ Series (Arm Cortex-M4 core)
TXZ3A+ Series (Arm Cortex-M3 core)
Those two series contain these groups:
- M4K Group
TMPM4K Group(2) – no 40nm Group(1)
12 members: eg TMPM4KNFYAFG - M4M Group
TMPM4M Group(1) – currently no Group(2)
10 members: eg TMPM4MLFWAFG - M4G Group
TMPM4G Group(1) - M4N Group
TMPM4N Group(1) - M3H Group