Editing greenwaves/gap8 (section)

=== MCU ===
The microcontroller block is a fairly standard MCU with many of the standard features. The MCU is situated on its own power domain with the peripherals power switchable and configurable along with the clock generator. It consists of a single system management core (also called a fabric controller by GreenWaves) for tasks such as peripherals and it can double as general purpose low-power core, meaning compute engine can remain power-gated unless absolutely necessary. This core has its own 16 KiB of data cache and 4 KiB of instruction cache. 

The chip features [[nine cores]] (1 serving in the MCU + 8 in the compute engine), all are fully compliant {{arch|32}} [[RISC-V]] cores with support for the {{risc-v|m|integer multiplication and division instructions}} (M) and {{risc-v|c|compressed instructions}} (C) {{risc-v|standard extensions}} (i.e., RV32IMC). Inherited from {{ethz|PULP}} and further enhanced by GreenWaves is the use of the RISC-V standard ISA extension mechanism {{risc-v|non-standard_extensions|to enhance}} the cores and improve performance for DPS-centric operations, specifically operations frequently found in the algorithms executed by the compute engine. Specific instructions were added for operating on [[Convolutional Neural Networks]] (CNNs), [[Support Vector Machines]] (SVMs), [[Bayesian]], Boosting, Visual Location, [[Fast Fourier Transforms]] (FFT), [[Cepstral Analysis]] and various others.

The MCU was designed to feel and behave like any other microcontroller on the market. It can be programmed using the familiar standard GCC/GDB toolchain derived from the one developed by the RISC-V foundation. Currently two real-time operating systems are supported, the PULP OS and Arm Mbed OS. GreenWaves has developed a full set of drivers for both of those operating systems in order to allow access to all the GAP8 peripherals.

The controller has a real-time clock (RTC) that can run at just 70nA low-power standby modes enabling the device to wake-up automatically.
Has subobject "Has subobject" is a predefined property representing a container construct and is provided by Semantic MediaWiki.	GAP8 - GreenWaves#package +
base frequency	250 MHz (0.25 GHz, 250,000 kHz) +
core count	9 +
core voltage (max)	1.2 V (12 dV, 120 cV, 1,200 mV) +
core voltage (min)	1 V (10 dV, 100 cV, 1,000 mV) +
designer	GreenWaves +
first announced	October 2016 +
first launched	February 26, 2018 +
full page name	greenwaves/gap8 +
instance of	microprocessor +
io voltage	1.8 V (18 dV, 180 cV, 1,800 mV) + and 3.3 V (33 dV, 330 cV, 3,300 mV) +
isa	RV32IMC +
isa family	RISC-V +
l1$ size	100 KiB (102,400 B, 0.0977 MiB) +
l1d$ size	80 KiB (81,920 B, 0.0781 MiB) +
l1i$ size	20 KiB (20,480 B, 0.0195 MiB) +
l2$ size	0.5 MiB (512 KiB, 524,288 B, 4.882812e-4 GiB) +
ldate	February 26, 2018 +
main image	+
main image caption	GAP8, front package +
manufacturer	TSMC +
market segment	Embedded +
max cpu count	1 +
model number	GAP8 +
name	GAP8 +
package	aQFN +
power dissipation	0.06 W (60 mW, 8.046e-5 hp, 6.0e-5 kW) +
process	55 nm (0.055 μm, 5.5e-5 mm) +
release price	$ 5.00 (€ 4.50, £ 4.05, ¥ 516.65) +
smp max ways	1 +
technology	CMOS +
thread count	9 +
word size	32 bit (4 octets, 8 nibbles) +