MAX6683 MAXIM [Maxim Integrated Products], MAX6683 Datasheet - Page 11

• Manufacturer Part Number: MAX6683
• Description: Temperature Sensor and System Monitor in a 10-Pin ?MAX
• Manufacturer: MAXIM [Maxim Integrated Products]

Figure 3. SMBus Write Timing Diagram
Figure 4. SMBus Read Timing Diagram
From a software prospective, the MAX6683 appears as
a set of byte-wide registers that contain voltage and tem-
perature data, alarm threshold values, or control bits.
The device employs five standard SMBus protocols:
write byte, read byte, read word, send byte, and
receive byte (Figures 2, 3, 4).
The device address can be set to one of four different
values by pin strapping ADD to GND, SDA, SCL, or
SMBus/I
SMBCLK
SMBDATA
SMBCLK
SMBDATA
A = START CONDITION
B = MSB OF ADDRESS CLOCKED INTO SLAVE
C = LSB OF ADDRESS CLOCKED INTO SLAVE
D = R/W BIT CLOCKED INTO SLAVE
E = SLAVE PULLS SMBDATA LINE LOW
A = START CONDITION
B = MSB OF ADDRESS CLOCKED INTO SLAVE
C = LSB OF ADDRESS CLOCKED INTO SLAVE
D = R/W BIT CLOCKED INTO SLAVE
t
SU:STA
t
SU:STA
2
C-Compatible Digital Interface
A
A
______________________________________________________________________________________
t
HD:STA
t
HD:STA
t
LOW
t
LOW
B
B
t
HIGH
t
HIGH
System Monitor in a 10-Pin µMAX
t
SU:DAT
t
Slave Address
SU:DAT
C
C
F = ACKNOWLEDGE BIT CLOCKED INTO MASTER
G = MSB OF DATA CLOCKED INTO SLAVE
H = LSB OF DATA CLOCKED INTO SLAVE
I = SLAVE PULLS SMBDATA LINE LOW
E = SLAVE PULLS SMBDATA LINE LOW
F = ACKNOWLEDGE BIT CLOCKED INTO MASTER
G = MSB OF DATA CLOCKED INTO MASTER
H = LSB OF DATA CLOCKED INTO MASTER
I = MASTER PULLS DATA LINE LOW
D
D
E
E
Temperature Sensor and
F
F
V
same bus without address conflicts (Table 1). The
address pin state is checked at the beginning of each
SMBus/I
V
Serial Address Register and overwrites the code set by
connecting the ADD pin until the MAX6683 is taken
through a POR cycle.
The MAX6683 also responds to the SMBus alert
response address (see Alert Response Address).
CC
CC
t
HD:DAT
, so more than one MAX6683 can reside on the
. Any address code can also be written to the
G
G
2
C transaction and is insensitive to glitches on
H
H
J = ACKNOWLEDGE CLOCKED INTO SLAVE
K = ACKNOWLEDGE CLOCK PULSE
L = STOP CONDITION
M = NEW START CONDITION
J = ACKNOWLEDGE CLOCKED INTO MASTER
K = ACKNOWLEDGE CLOCK PULSE
L = STOP CONDITION, DATA EXECUTED BY SLAVE
M = NEW START CONDITION
I
I
J
J
K
K
t
SU:STO
t
SU:STO
L
L
t
BUF
t
BUF
M
M
11