TN0108

Reset and BAM

Doc ID 15874 Rev 2

17/26

6

Reset and BAM

6.1

Reset Configuration Halfword (RCHW)

The RCHW (Reset Configuration Half Word) has been changed from being in the lower to

the upper 32-bits of the address space, as defined in the table below.

The user must ensure that the Flash RCHW is updated. Otherwise a valid RCHW will not be

found and the device will not successfully boot from Flash.

6.2

Correct reset event-disable feature

On Cut 1.1 devices, it was possible to disable all reset events by writing to the RGM_FERD

and RGM_DERD bits. This was never intended as a supported mode of operation, since it is

not desirable to be able to lock out all reset sources.

On Cut 2, the distribution of reset sources in the DERD and FERD registers has been

changed as shown in the table below. In addition, the DERD register has been set to read

only, so the reset sources within DERD cannot be disabled.

Table 16.

RCHW differences

Silicon revision

RCHW format

SPC560B Cut 1.1

0x0000_005A

SPC560B Cut 2

0x005A_0000