MCP98243 datasheet(42/62 Pages) MICROCHIP

42 / 62 page

MCP9843/98243

DS22153C-page 42

5.3.4.3

Sequential Read

Sequential reads are initiated in the same way as a

random read, with the exception that after the

MCP98243 transmits the first data byte, the master

issues an acknowledge, as opposed to a stop condition

in a random read. This directs the MCP98243 to

transmit the next sequentially addressed 8-bit word

(Figure 5-20).

To provide sequential reads, the MCP98243 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 5-20:

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

5.3.5

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

678

SCL

Address Byte

MCP98243

Data at (n+1)

678

567

Data at (n+2)

Data (n)1

MCP98243

Data at (n+m)(1)

Note 1: ‘n’ is the initial address location and ‘m’ is the final address location (‘n+m’ < 256)

Master

MCP98243 Datasheet(PDF) 42 Page - Microchip Technology