ADuC7023BCBZ62I-R7 datasheet(39/96 Pages) AD

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Data Sheet

ADuC7023

| Page 39 of 96

FEEMOD Register

Name:

FEEMOD

Address:

0xFFFFF804

Default value:

0x0000

Access:

Read/write

Function:

FEEMOD sets the operating mode of the flash control interface. Table 32 shows FEEMOD MMR bit designations.

Table 32. FEEMOD MMR Bit Designations

Bit

Description

15 to 9

Reserved.

Reserved. Always set this bit to 0.

7 to 5

Reserved. Always set this bit to 0 except when writing keys. See the Sequence to Write the Key section.

Flash/EE interrupt enable.

This bit is set by the user to enable the Flash/EE interrupt. The interrupt occurs when a command is complete.

This bit is cleared by the user to disable the Flash/EE interrupt.

Erase/write command protection.

This bit is set by the user to enable the erase and write commands.

This bit is cleared to protect the Flash/EE against erase/write command.

2 to 0

Reserved. Always set this bit to 0.

FEECON Register

Name:

FEECON

Address:

0xFFFFF808

Default value:

0x07

Access:

Read/write

Function:

FEECON is an 8-bit command register. The commands are described in Table 33.

Table 33. Command Codes in FEECON

Code

Command

Description

0x001

Null

Idle state.

0x011

Single read

Load FEEDAT with the 16-bit data. Indexed by FEEADR.

0x021

Single write

Write FEEDAT at the address pointed by FEEADR. This operation takes 50 µs.

0x031

Erase/write

Erase the page indexed by FEEADR, and write FEEDAT at the location pointed by FEEADR. This operation takes

approximately 24 ms.

0x041

Single verify

Compare the contents of the location pointed by FEEADR to the data in FEEDAT. The result of the comparison is

returned in FEESTA Bit 1.

0x051

Single erase

Erase the page indexed by FEEADR.

0x061

Mass erase

Erase 62 kB of user space. The 2 kB of kernel are protected. This operation takes 2.48 sec. To prevent accidental

execution, a command sequence is required to execute this instruction. See the Command Sequence for

Executing a Mass Erase section.

0x07

Reserved

Reserved.

0x08

Reserved

Reserved.

0x09

Reserved

Reserved.

0x0A

Reserved

Reserved.

0x0B

Signature

Give a signature of the 64 kB of Flash/EE in the 24-bit FEESIGN MMR. This operation takes 32,778 clock cycles.

0x0C

Protect

This command can run one time only. The value of FEEPRO is saved and removed only with a mass erase (0x06) or

the key (FEEADR/FEEDAT).

Rev. E

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