ISL1209_06 Datasheet, PDF (18/24 Pages) Intersil Corporation – Low Power RTC with Battery Backed SRAM and Event Detection

ISL1209
SCL
SDA
START
DATA
DATA
DATA
STABLE CHANGE STABLE
STOP
FIGURE 12. VALID DATA CHANGES, START, AND STOP CONDITIONS
SCL FROM
MASTER
1
SDA OUTPUT FROM
TRANSMITTER
8
9
HIGH IMPEDANCE
SDA OUTPUT FROM
RECEIVER
HIGH IMPEDANCE
START
ACK
FIGURE 13. ACKNOWLEDGE RESPONSE FROM RECEIVER
SIGNALS FROM
THE MASTER
SIGNAL AT SDA
SIGNALS FROM
THE ISL1209
WRITE
S
T
A ^{IDENTIFICATION}
R
BYTE
T
ADDRESS
BYTE
11011110 0000
A
A
C
C
K
K
DATA
BYTE
S
T
O
P
A
C
K
FIGURE 14. BYTE WRITE SEQUENCE
18
FN6109.4
October 17, 2006