MAX1361 Datasheet, PDF (14/24 Pages) Maxim Integrated Products – 4-Channel, 10-Bit, System Monitors with Programmable Trip Window and SMBus Alert Response

4-Channel, 10-Bit, System Monitor with Programmable
Trip Window and SMBus Alert Response
START
CONDITION
R/W BIT FROM
THE MASTER
START
ADDRESS
FROM THE MASTER
0
A
CONFIGURATION
BYTE FROM THE MASTER
A
SETUP
BYTE FROM THE MASTER
A STOP
Figure 8. Example of Writing Setup and Control Bytes
START
CONDITION
R/W BIT FROM
THE MASTER
START
ADDRESS
FROM THE MASTER
0
A
MONITOR
SETUP BIT
SETUP BYTE
FROM THE MASTER
1A
ALARM RESET, SCAN
SPEED, INT_EN
A
CH 0 LT [11:4] A CH 0 LT [3:0]; UT [11:8] A
CH 0 UT [7:0]
A
CH 1 LT [11:4]
A
STOP
Figure 9. Example of Extended Setup-Byte Writing
Table 2. Configuration Byte Format*
BIT
NAME
7(MSB) CONFIG The configuration byte always starts with 0.
DESCRIPTION
6
SCAN1 ^{SCAN1, SCAN0 = [0,0], scans from channel 0 to the upper channel chosen by CS1, CS0.}
SCAN1, SCAN0 = [0,1], converts a single channel chosen by CS1, CS0 eight times.
SCAN1, SCAN0 = [1,0] monitor mode monitors from channel 0 to the upper channel chosen by CS1, CS0.
5
SCAN0 _{SCAN1, SCAN0 = [1,1], single channel conversion for the channel is chosen by CS0, CS1.}
4
CS3
CS3, CS2 = [1,1] enables readback of monitor-mode setup data.
3
CS2
2
CS1
Selects the upper limit of the channel range used for the conversion sequence in scan modes SCAN = [0,0]
and monitor modes SCAN = [1,0].
1
CS0 ^{Selects the conversion channel when SCAN = [0,1] or when SCAN = [1,1].}
(Tables 5 and 6)
1 = single-ended inputs.
0 = differential inputs.
AIN0 and AIN1 form the first differential pair and AIN2 and AIN3 form the second differential pair. (See Tables
4 and 5.)
0
SE/DIF Selects single-ended or differential conversions. In single-ended mode, input signal voltages are referenced
to GND. In differential mode, the voltage difference between two channels is measured.
When single-ended mode is used, the MAX1361/MAX1362 perform unipolar conversions regardless of the
UNI/BIP bit in the setup byte.
(Table 7)
*Power-on defaults: 0x01
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