C511 datasheet(109/128 Pages) SIEMENS

109 / 128 page

Semiconductor Group

9-9

EEPROM Programming Interface

SAB-C513A-H

9.2.4.2

Memory Select Register PMSEL

This register specifies which EEPROM memory cells or memory blocks will be accessed during a

write or delete operation. The smallest amount of memory that can be accessed at a time is one

byte, the largest is the whole memory. For read operations the settings of this register have no

effect.

Programming Interface Register PMSEL (Address 01H)

Reset Value : XXX00000B

Bit

Function

–

Reserved Bits

These bits must be written with ’0’. During reads these bits will be undefined.

SEL4 - 0

Select Mode Bits

These bits allow to define various granularities for writing or deleting specific

memory areas. Single byte, 64 byte or 1KB byte blocks as well as even/odd

addresses in 64 byte/1K byte blocks can be selected according the table

below.

All other combination of SEL4-0 are not defined and might lead to

unpredictable results.

–

SEL4

01H

PMSEL

Bit No.

MSB

LSB

SEL3

SEL2

SEL1

SEL0

SEL4 - 0

Mode

0 0 0 0 0

The address in PADRH/PADRL specifies the byte to be

accessed.

0 0 0 0 1

The complete 1KB block which contains the byte addressed

by PADRH/PADRL is selected.

0 0 0 1 0

The complete 64 byte block which contains the byte

addressed by PADRH/PADRL is selected.

0 0 1 0 1

If A0=0 all even addressed bytes, if A0=1 all odd addressed

bytes of the1KB block which contains the byte addressed by

PADRH/PADRL are selected.

0 0 1 1 0

If A0=0 all even addressed bytes, if A0=1 all odd addressed

bytes of the 64 byte block which contains the byte addressed

by PADRH/PADRL are selected.

1 1 0 0 1

With this combination of SEL4-0 the total 12K memory is

selected.This combination is useful for fast erase/fill

operations of the EEPROM memory.

1 1 1 0 1

If A0=0 all even addressed bytes, if A0=1 all odd addressed

bytes of the total 12K memory are selected.

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