MCP98244 datasheet(33/52 Pages) MICROCHIP

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 2012-2013 Microchip Technology Inc.

DS22327C-page 33

MCP98244

5.3.3

BANK OR PAGE SELECTION FOR

EEPROM READ/WRITE OPERATION

There are two 256 byte banks or pages in this device

(512 bytes total). The pages are selected using I2C

Set Page Address (SPA) command byte of ‘0110

1100

’ for bank/page 0 and ‘0110 1110’ for bank/page

1, see Table 5-5.

The current page status can be read using the Read

Page Address (RPA) Command. If the device ACK or

NAK the command, then the current page is 0 or 1,

respectively.

TABLE 5-4:

SELECTING 256 BYTE BANKS OR PAGES FOR EEPROM READ/WRITE

FIGURE 5-12:

Timing Diagram for Bank/Page Selection (See Section 4.0 “Serial

Communication”)

EEPROM

Function

Operation

Address Byte

A0 PIN Voltage

MCP98244

output

Address

Code

Slave Address 1

R/W

Set Bank/Page Address 0 (SPA0)

WRITE

0110

VDD, VSS, VHV ACK, Page 0 Set

Set Bank/Page Address 1 (SPA1)

WRITE

0110

VDD, VSS, VHV ACK, Page 1 Set

Read Bank/Page Address (RPA)

READ

0110

VDD, VSS, VHV ACK for Page 0

NAK for Page 1

Note 1:

A0, A1, A2 address pin states are ignored.

SDA

567

SCL

Address Byte

MCP98244

Data

Word Address

MCP98244

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