M14C64, M14C32

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Memory Addressing

To start communication between the bus master

and the slave memory, the master must initiate a

START condition. Following this, the master sends

8 bits to the SDA bus line (with the most significant

bit first). These bits represent the Device Select

Code (7 bits) and a RW bit.

The seven most significant bits of the Device Se-

lect Code are the Device Type Identifier, according

SCL

SDA

SCL

SDA

SDA

START

CONDITION

SDA

INPUT

SDA

CHANGE

AI00792

STOP

CONDITION

1

23

7

89

MSB

ACK

START

CONDITION

SCL

1

23

7

89

MSB

ACK

STOP

CONDITION

Note: 1. The most significant bit, b7, is sent first.

Device Code

Chip Enable

RW

b7

b6

b5

b4

b3

b2

b1

b0

Device Select

1010000

RW

Note: 1. b15 to b13 are Don’t Care on the M14C64 series.

b15 to b12 are Don’t Care on the M14C32 series.

Table 3. Most Significant Byte

b15

b14

b13

b12

b11

b10

b9

b8

Table 4. Least Significant Byte

b7

b6

b5

b4

b3

b2

b1

b0