NRF51802-QFAA-R datasheet(17/85 Pages) NORDIC

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Page 17

nRF51802 Product Specification v1.2

3.2.1

Code organization

Table 3 Code organization

3.2.2

RAM organization

RAM is divided into blocks for separate power management which is controlled by the POWER System Block.

Each block is divided into two 4 kByte RAM sections with separate RAM AHB slaves.

Please see the nRF51 Series Reference Manual for more information.

Table 4 RAM organization

How to organize the use of the RAM

For the best performance we recommend the following use of the RAM AHB slaves (Note that the Crypto

consists of CCM, ECB, and AAR modules):

• If the Radio and Crypto buffers together are larger in size than one RAM section, the buffers

should be separated so the memory used by the Radio is in one RAM section while the

memory used by the Crypto is in another RAM section.

• The sections used by CODE should not be combined with sections used by the Radio,

Crypto, or SPI.

• The Stack and Heap should be placed at the top section and should not be combined with

sections used by the Radio, Crypto, or SPI.

Chip variant

Code size

Page size

No of pages

nRF51802-QFAA

nRF51802-QCAA

256 kB

1024 byte

256

Chip variant

RAM size

Block

Size

nRF51802-QFAA

nRF51802-QCAA

16 kB

Block0

Block1

8 kB

NRF51802-QFAA-R Datasheet(PDF) 17 Page - Nordic Semiconductor