Data Sheet

Atmel | SMART SAM D21 [DATASHEET]

Atmel-42181G–SAM-D21_Datasheet–09/2015

12.13.11Coresight ROM Table Memory Type

Name: MEMTYPE

Offset: 0x1FCC

Reset: 0x0000000X

Property: -

z Bits 31:1 – Reserved

These bits are unused and reserved for future use. For compatibility with future devices, always write these bits to

zero when this register is written. These bits will always return zero when read.

z Bit 0 – SMEMP: System Memory Present

This bit indicates whether system memory is present on the bus that connects to the ROM table.

This bit is set at powerup if the device is not protected indicating that the system memory is accessible from a

debug adapter.

This bit is cleared at powerup if the device is protected indicating that the system memory is not accessible from a

debug adapter.

Bit 3130292827262524

AccessRRRRRRRR

Reset00000000

Bit 2322212019181716

AccessRRRRRRRR

Reset00000000

Bit 151413121110 9 8

AccessRRRRRRRR

Reset00000000

Bit 76543210

SMEMP

AccessRRRRRRRR

Reset0000000X