ISL1219 Datasheet, PDF (18/24 Pages) Intersil Corporation – Low Power RTC with Battery Backed SRAM and Event Detection

ISL1219
SCL
SDA
START
DATA
DATA
DATA
STABLE CHANGE STABLE
STOP
FIGURE 14. 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 15. ACKNOWLEDGE RESPONSE FROM RECEIVER
SIGNALS FROM
THE MASTER
SIGNAL AT SDA
SIGNALS FROM
THE ISL1219
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 16. BYTE WRITE SEQUENCE
18
FN6314.2
July 15, 2010