Flash - Texas Instruments SimpleLink CC2620 Technical Reference Manual

Zigbee rf4ce wireless mcu simplelink cc13 series; simplelink cc26 series

Mode 2 is intended for systems where cache is in GPRAM mode. VIMS is retained with retention power to

NOTE: If software tries to put VIMS into enabled mode after retention, the system fails because the

TAG memory is corrupted.

The correct procedure is to put VIMS into off mode; then put VIMS into disabled mode (see

more details).

The ROM contains a serial bootloader with SPI and UART support (see

as well as a Driver Library and an RF stack support. See , Memory Map chapter for details.

FLASH

The flash memory is organized as a set of 4-KB blocks that can be individually erased. An individual 32-bit

word can be programmed to change bits from 1 to 0. In addition, a write buffer provides the ability to

program 32 continuous words in flash memory in half the time of programming the words individually.

Erasing a block causes the entire contents of the block to be reset to all 1s. The 4-KB blocks are paired

with sets of 8-KB blocks that can be individually protected. The protection allows blocks to be marked as

read-only or execute-only, thus providing different levels of code protection. Read-only blocks cannot be

erased or programmed, which protects the contents of those blocks from being modified. Execute-only

blocks cannot be erased or programmed and can only be read by the controller instruction fetch

mechanism, which protects the contents of those blocks from being read by either the controller or a

The Flash block is mainly clocked by the 48-MHz system clock.

7.4.1 FLASH Memory Protection

The FLASH memory can be read/write protected in 4-KB sectors by configuring the CCFG.

SWCU117C – February 2015 – Revised September 2015

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Figure 7-8. GPRAM Retention

If switch to enabled is needed, the

following sequence is required:

8, Bootloader chapter),

Versatile Instruction Memory System (VIMS)

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