ISL1218 Intersil Corporation, ISL1218 Datasheet - Page 15

• Manufacturer Part Number: ISL1218
• Description: I2C Real Time Clock/Calendar
• Manufacturer: Intersil Corporation

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The ISL1218 responds with an ACK after recognition of a
START condition followed by a valid Identification Byte, and
once again after successful receipt of an Address Byte. The
SDA OUTPUT FROM
SDA OUTPUT FROM
TRANSMITTER
SCL FROM
RECEIVER
SDA
SCL
MASTER
SIGNALS FROM
SIGNAL AT SDA
SIGNALS FROM
THE MASTER
THE ISL1218
15
START
FIGURE 12. VALID DATA CHANGES, START, AND STOP CONDITIONS
START
FIGURE 13. ACKNOWLEDGE RESPONSE FROM RECEIVER
HIGH IMPEDANCE
A
R
S
T
T
1
FIGURE 14. BYTE WRITE SEQUENCE
IDENTIFICATION
1
1
0
BYTE
1
STABLE
1 1 1
DATA
ISL1218
WRITE
0
A
C
K
CHANGE
DATA
0 0 0 0
ADDRESS
ISL1218 also responds with an ACK after receiving a Data
Byte of a write operation. The master must respond with an
ACK after receiving a Data Byte of a read operation.
BYTE
STABLE
DATA
8
A
C
K
DATA
BYTE
HIGH IMPEDANCE
STOP
ACK
9
A
C
K
S
O
P
T
June 22, 2006
FN6313.0