COREAI-M datasheet(20/25 Pages) ACTEL

20 / 25 page

CoreAI

v2.0

ACM Writes

An example of writing data into the ACM is illustrated in

Figure 5. The steps for writing information into the AB

block via the ACM are as follows:

1. Read the ACM Control/Status register to make

sure that CoreAI is not busy processing an ACM

read or write.

2. Write the desired ACM address to the ACM

Address register.

3. Write the desired ACM data to the ACM Data

4. Keep reading the ACM Control/Status register

until CoreAI is not busy processing the ACM

write.

ACM Reads

An example of reading data from the ACM is illustrated

in Figure 6. The steps for reading information from the

AB block via the ACM are as follows:

1. Read the ACM Control/Status register to make

sure that CoreAI is not busy processing an ACM

read or write.

2. Write the desired ACM address to the ACM

Address register.

3. Write a logic 1 to the ACMRDSTART bit of the

ACM Control/Status register.

4. Keep reading the ACM Control/Status register

until CoreAI is not busy processing the ACM read.

5. Read the ACM Data register to read the byte of

ACM data that is now available from the AB

block.

Note: 8-bit APB reads and writes are shown.

Figure 5 • ACM Write Procedure

PCLK

PADDR[4:0]

PWRITE

PSEL

PENABLE

PWDATA[7:0]

PRDATA[7:0]

ACMCtrlStat

ACMAddr

ACMData

ACMCtrlStat

ACMADDR[7:0]

ACMDATA[7:0]

Note: 8-bit APB reads and writes are shown.

Figure 6 • ACM Read Procedure

PCLK

PADDR[4:0]

PWRITE

PSEL

PENABLE

PWDATA[7:0]

PRDATA[7:0]

ACMCtrlStat

ACMAddr

ACMCtrlStat

ACMData

ACMADDR[7:0]

ACMDATA[7:0]

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