Rainbow Electronics MAX6635 - Manual (Page 13)

MAX6633/MAX6634/MAX6635
12-Bit Plus Sign Temperature Sensors with
SMBus/I 2 C-Compatible Serial Interface
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ADDRESS DESCRIPTION POR STATE
00h
Temperature register
(READ only)
0000h
01h
Configuration-Byte
register
00h
02h T HYST register 0100h
03h T
MAX
register 2800h
04h T LOW register 0500h
05h T HIGH register 2000h
Table 2. Pointer Register Bit
Assignments
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
MSB
(Sign)
Bit
12
Bit
11
Bit
10
Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 T MAX T HIGH T LOW
Table 3. Temperature Register
D7 D6 D5 D4 D3 D2 D1 D0
0 0
SMB Timeout
Disable
Fault Queue
Enable
ALERT
Polarity
OVERT
Polarity
Comparator
or Interrupt
Shutdown
Table 4. Configuration Register
D15: MSB is the first sign bit.
D2, D1, D0: Flag bits for T
MAX
, T
HIGH
, T
LOW
.
1LSB = 0.0625°C.
Temperature is stored in two’s complement format.
Power-on default = 0h.
D0: 0 = normal operation; 1 = shutdown.
D1: 0 = comparator mode; 1 = interrupt mode.
D2 to D3: 0 = active low; 1 = active high.
D5: 0 = normal SMBus operation; 1 = full I 2 C compatibility.
D7 to D6: Reserved locations, always write zeros.