FM75 Fairchild Semiconductor, FM75 Datasheet - Page 12

• Manufacturer Part Number: FM75
• Description: Low Voltage 2-Wire Digital Temperature Sensor with Thermal Alarm
• Manufacturer: Fairchild Semiconductor

FM75
12
SDA
SCL
SDA
SCL
. . .
SDA
. . .
SCL
Figure 8. Pointer Set Followed by Immediate Read from A 2-byte Register (Temperature, T
Repeat
Master
Start
from
S
S
SDA
S
SCL
1
1
1
Figure 9. Two-byte Read from Preset Pointer Location (Temperature, T
0
0
0
S
0
Address Byte
0
0
Address Byte
Address
Figure 10. One-byte Read from Configuration Register with Preset Pointer
1
1
1
Byte
1
A2
A2
0
A2
A1
A1
0
A1
Address Byte
A0
A0
1
A0
R/W
R/W
R/W
A2
FM75
FM75
from
Ack
from
Ack
A
A
FM75
from
Ack
A
A1
D7
D7
0
A0
D6
D6
Most Significant Data
Most Significant Data
0
R/W
D5
D5
(from FM75)
(from FM75)
0
Pointer Byte
D4
D4 D3
Byte
FM75
Byte
from
Ack
A
Note: This segment of this timing diagram is a generic
pointer set cycle which must be followed by either an
immediate read cycle or write cycle as shown in this
figure and in figures 10, 11, and 12.
0
D3
X
0
D2
D2
D6
0
D1 D0
D1
P1
D5
D0
(from FM75)
Master
Master
Data Byte
from
P0
Ack
from
Ack
A
D4
A
aTS75
from
Ack
D7
A
D7
D3
Least Significant Data Byte
D6 D5
D6
. . . .
. . . .
Least Significant Data
OS
D2
D5
or T
(from FM75)
(from FM75)
D1
D4
D4
HYST
Byte
OS
D0
PRODUCT SPECIFICATION
0
0
Register)
or T
No Ack
Master
0
from
0
N
HYST
REV. 1.0.4 10/3/02
0
0
P
0
Register)
0
No Ack
Master
No Ack
Master
from
from
N
N
P
P