MCP98244 datasheet(38/52 Pages) MICROCHIP

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MCP98244

DS22327C-page 38

 2012-2013 Microchip Technology Inc.

5.3.5.3

Sequential Read

Sequential reads are initiated in the same way as a

random read, with the exception that after the

MCP98244 transmits the first data byte, the master

issues an acknowledge, as opposed to a stop condition

in a random read. This directs the MCP98244 to

transmit the next sequentially addressed 8-bit word

(Figure 5-16).

To provide sequential reads, the MCP98244 contains

an internal address pointer, which is incremented by

one at the completion of each operation. This address

pointer allows the entire memory contents to be serially

read during one operation.

FIGURE 5-16:

Timing Diagram for Sequential Read (See Section 4.0 “Serial Communication”).

5.3.6

STANDBY MODE

The design will incorporate a low-power Standby mode

(ISHDN). Standby mode will be entered after a normal

termination of any operation and after all internal

functions are complete. This would include any error

conditions occurring, such as improper number of clock

cycles or improper instruction byte as defined

previously.

SDA

567

345

SCL

Address Byte

MCP98244

Master

Data at (n+1)

345

678

567

Data at (n+2)

Data (n)1

Master

Data at (n+m)(1)

Note 1:

‘n’ is the initial address location and ‘m’ is the final address location (‘n+m’ < 256)

Master

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