C511 datasheet(110/128 Pages) SIEMENS

110 / 128 page

EEPROM Programming Interface

SAB-C513A-H

Semiconductor Group

9-10

9.2.4.3

Data Register PDATA

This register contains the data to be written into the selected memory bytes during write operations.

When reading from this address, the contents of the memory byte selected by PADRH/PADRL will

be put onto the data bus. The written content of PDATA will not be disturbed by reading PDATA.

Programming Interface Register PDATA (Address 02H)

Reset Value : XXH

9.2.4.4

Address Low Register PADRL and PADRH

The PADRH/PADRL registers contain the 14-bit address of the EEPROM byte to be accessed

during read or write operations. The LSB part of the address is stored in PADRL and the MSB part

of the address is stored in PADRH. PADRL is combined with PADRH to form the complete 14-bit

address.

Depending on the settings in the register PMSEL (SEL4-0 bits) the combined address also may

specify memory blocks for write/erase operations. If automatic address increment is selected the

combined address will be incremented by 1 after every read access.

Reading the PARDH/PADRL registers will put its actual value onto the data bus. Bits 6 and 7 of

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

Programming Interface Registers PADRL/PADRH (Address 03H/04H)

Reset Values : XXH

02H

PDATA

Bit No.

MSB

LSB

03H

PADRL

Bit No.

MSB

LSB

––

A13

A12

04H

PADRH

A11

A10

C511 Datasheet(PDF) 110 Page - Siemens Semiconductor Group