CAT1027WI-42 데이터 시트보기 (PDF) - Catalyst Semiconductor => Onsemi

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CAT1027WI-42

Dual Voltage Supervisory Circuits with I2C Serial 2k-bit CMOS EEPROM

Catalyst Semiconductor => Onsemi 

CAT1026, CAT1027

Page Write

The CAT1026 and CAT1027 write up to 16 bytes of

data in a single write cycle, using the Page Write

operation. The page write operation is initiated in the

same manner as the byte write operation, however

instead of terminating after the initial byte is

transmitted, the Master is allowed to send up to 15

additional bytes. After each byte has been transmitted,

the CAT1026 and CAT1027 will respond with an

acknowledge and internally increment the lower order

address bits by one. The high order bits remain

unchanged.

If the Master transmits more than 16 bytes before

sending the STOP condition, the address counter

‘wraps around,’ and previously transmitted data will be

overwritten.

When all 16 bytes are received, and the STOP condition

has been sent by the Master, the internal programming

cycle begins. At this point, all received data is written to

the CAT1026 and CAT1027 in a single write cycle.

Figure 8. Byte Write Timing

S

T

BUS ACTIVITY: A

MASTER R

T

SLAVE

ADDRESS

BYTE

ADDRESS

S

T

DATA

O

P

SDA LINE S

P

A

A

A

C

C

C

K

K

K

Figure 9: Page Write Timing

S

T

BUS ACTIVITY: A

MASTER R

T

SDA LINE S

SLAVE

ADDRESS

BYTE

ADDRESS (n)

A

A

C

C

K

K

DATA n

DATA n+1

A

A

C

C

K

K

S

T

DATA n+15 O

P

P

A

C

K

© 2007 Catalyst Semiconductor, Inc.

11

Characteristics subject to change without notice

Doc. No. 3010 Rev. L

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