MAC7200 datasheet(529/976 Pages) FREESCALE

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Memory Map/Register Definition

MAC7200 Microcontroller Family Reference Manual, Rev. 2

Freescale Semiconductor

451

Address Refer to Table 25-1

Access: Refer to Table 25-2

9876543210

000

NEXUS

000

SEC

MODE

DMAACTCH

W rsvd

rsvd

RESET:

00000000

0/1

0000

= Writes have no effect on this bit

rsvd

= Reserved for future use

Figure 25-2. Status (STATUS) Register

Table 25-2. STATUS Allowed Register Accesses

8-bit

16-bit

32-bit1

1. All 32-bit accesses must be aligned to 32-bit addresses (i.e. 0x0, 0x4, 0x8 or 0xC).

READ

Allowed

Not Allowed

WRITE

Not Allowed

Table 25-3. STATUS Field Descriptions

Field

Description

12–11

NEXUS

Nexus Status. This field reflects the current status of the Nexus Port.

00 No Nexus hardware attached

01 No Nexus hardware attached

10 Nexus hardware attached to Nexus Primary Port

11 Nexus hardware attached to Nexus Secondary Port

SEC

Security Status. This bit reflects the current security state of the Flash.

1 The Flash is secured

0 The Flash is not secured

6–5

MODE

Device Mode. This field reflects the current mode of the device, and is only valid when the TEST pin is driven low.

00 Single Chip

01 Reserved

10 Primary Bootloader

11 Single Chip

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