USER'S GUIDE

case is to select a Range of 8K, and to choose a Parti- tion of greater than 8K. This will result in the Range as the limiting factor. Addresses above the Range will auto- matically be deflected to the Expanded bus. No data memory will be allocated in NV RAM for this configura- tion.

DS5000 Memory Map Control

The Partition and Range can be selected using the Bootstrap Loader discussed in a later section. In addi-

tion, the Partition can be selected or modified by the ap- plication software and CE2 is normally software con- trolled. However, in either case, the MCON SFR is used to choose these settings. The MCON is summarized in the SFR section below, but appears here also.

DS5000 SERIES MCON REGISTER Figure 4±4

Bit Description:

MCON.7±4:

PA3±0

 

 

 

 

ªPartition Addressº:

Use to select the starting address of Data Memory in Embedded RAM. Pro-

 

gram space lies below the Partition address.

 

Selection:

 

 

 

 

PA3

PA2

PA1

PA0

Partition Address

 

0

0

0

0

0000H

 

0

0

0

1

0800H

 

0

0

1

0

1000H

 

0

0

1

1

1800H

 

0

1

0

0

2000H

 

0

1

0

1

2800H

 

0

1

1

0

3000H

 

0

1

1

1

3800H

 

1

0

0

0

4000H

 

1

0

0

1

4800H

 

1

0

1

0

5000H

 

1

0

1

1

5800H

 

1

1

0

0

6000H

 

1

1

0

1

6800H

 

1

1

1

0

7000H*

 

1

1

1

1

8000H*

 

*A 4K byte increment (not 2K bytes) in the Partition Address takes

 

place between bit field values 1110B and 1111B.

Initialization:

Set to all 1's on a No VLI Power On Reset or when the Security Lock bit is

 

cleared to a 0 from a previous 1 state. These bits are also set to all 1's when

 

any attempt is made to have them cleared to all 0's with the SL bit set to a 1

 

(illegal

condition).

 

 

 

Read Access:

May be read anytime.

 

 

Write Access:

PAA bit must = 1 in order to write PA3±0. Timed Access is not required to

 

write to PA3±0 once PAA = 1.

 

 

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Mitsubishi DS907x SIP, DS5000TK manual DS5000 Memory Map Control, DS5000 Series Mcon Register ±4 Bit Description, PA3