Memory

The network core contains flash memory and RAM that can be used for code and data storage.

The following figure shows how the CPU and peripherals with EasyDMA can access RAM via the AHB multilayer interconnect.

The network core can access application core resources (flash, RAM, and peripherals) when granted permission through the application's DCNF and SPU settings. A small portion of the application core RAM is dedicated to the exchange of messages between the application and network cores.

Peripheral instantiation

The following table describes the abbreviations used in the Instance, Secure mapping, and DMA security columns of the instantiation table.

Table 1. Instantiation table abbreviations
Abbreviation	Description
NS	Trustzone/security attribute is Non-secure - The peripheral is accessible as a Non-secure peripheral.
S	Trustzone/security attribute is Secure - The peripheral is accessible as a Secure peripheral.
US	Trustzone Map is user selectable - The Trustzone/security attribute of the peripheral can be configured using SPU — System protection unit.
HF	Trustzone Map is hardware fixed - The Trustzone/security attribute of the peripheral cannot be changed.
NA	Not Applicable - Peripheral has no DMA capability.
NSA	NoSeparateAttribute - Peripheral with DMA and DMA transfer has the same security attribute as assigned to the peripheral.
SA	SeparateAttribute - Peripheral with DMA and DMA transfers can have a different security attribute than the one assigned to the peripheral.

The Secure mapping column in the following table defines configuration capabilities for the Arm® TrustZone® for Armv8-M secure attribute. The DMA security column describes the DMA capabilities of the peripheral.

Instantiation

Table 2. Instantiation table
ID	Base address	Instance	TrustZone			Split access	Description
ID	Base address	Instance	Map	Att	DMA	Split access	Description
0	0x41000000	DCNF	HF	NS	NA	No	Domain configuration
4	0x41004000	VREQCTRL	HF	NS	NA	No	Voltage request control
5	0x41005000	CLOCK	HF	NS	NA	No	Clock control
5	0x41005000	POWER	HF	NS	NA	No	Power control
5	0x41005000	RESET	HF	NS	NA	No	Reset status
6	0x41006000	CTRLAP	HF	NS	NA	No	Control access port CPU side
8	0x41008000	RADIO	HF	NS	NA	No	2.4 GHz radio
9	0x41009000	RNG	HF	NS	NA	No	Random number generator
10	0x4100A000	GPIOTE	HF	NS	NA	No	GPIO tasks and events
11	0x4100B000	WDT	HF	NS	NA	No	Watchdog timer
12	0x4100C000	TIMER0	HF	NS	NA	No	Timer 0
13	0x4100D000	ECB	HF	NS	NA	No	AES electronic code book (ECB) mode block encryption
14	0x4100E000	AAR	HF	NS	NA	No	Accelerated address resolver
14	0x4100E000	CCM	HF	NS	NA	No	AES counter with CBC-MAC (CCM) mode block encryption
15	0x4100F000	DPPIC	HF	NS	NA	No	DPPI controller
16	0x41010000	TEMP	HF	NS	NA	No	Temperature sensor
17	0x41011000	RTC0	HF	NS	NA	No	Real-time counter 0
18	0x41012000	IPC	HF	NS	NA	No	Interprocessor communication
19	0x41013000	SPIM0	HF	NS	NA	No	SPI master 0
19	0x41013000	SPIS0	HF	NS	NA	No	SPI slave 0
19	0x41013000	TWIM0	HF	NS	NA	No	Two-wire interface master 0
19	0x41013000	TWIS0	HF	NS	NA	No	Two-wire interface slave 0
19	0x41013000	UARTE0	HF	NS	NA	No	Universal asynchronous receiver/transmitter
20	0x41014000	EGU0	HF	NS	NA	No	Event generator unit 0
22	0x41016000	RTC1	HF	NS	NA	No	Real-time counter 1
24	0x41018000	TIMER1	HF	NS	NA	No	Timer 1
25	0x41019000	TIMER2	HF	NS	NA	No	Timer 2
26	0x4101A000	SWI0	HF	NS	NA	No	Software interrupt 0
27	0x4101B000	SWI1	HF	NS	NA	No	Software interrupt 1
28	0x4101C000	SWI2	HF	NS	NA	No	Software interrupt 2
29	0x4101D000	SWI3	HF	NS	NA	No	Software interrupt 3
128	0x41080000	ACL	HF	NS	NA	No	Access control lists
128	0x41080000	NVMC	HF	NS	NA	No	Non-Volatile Memory Controller
129	0x41081000	VMC	HF	NS	NA	No	Volatile memory controller
192	0x418C0500	P0	HF	NS	NA	No	General purpose input and output
192	0x418C0800	P1	HF	NS	NA	No	General purpose input and output
N/A	0x01FF0000	FICR	HF	NS	NA	No	Factory information configuration
N/A	0x01FF8000	UICR	HF	NS	NA	No	User information configuration
N/A	0xE0042000	CTI	HF	NS	NA	No	Cross-trigger interface