2001-2012 Microchip Technology Inc. DS21490D-page 11
TCN75
TABLE 5-3: TEMPERATURE (TEMP) REGISTER, 16 BITS, READ ONLY
The binary value in this register represents ambient temperature following a conversion cycle.
TABLE 5-4: TEMPERATURE SET POINT (T
SET
) REGISTER, 16 BITS, READ/WRITE
TABLE 5-5: HYSTERESIS (T
HYST
) REGISTER, 16 BITS, READ/WRITE
In the TEMP, T
SET
, and T
HYST
registers, each unit
value represents one-half degree (Celsius). The value
is in 2’s – complement binary format such that a read-
ing of 000000000b corresponds to 0°C. Examples of
this temperature to binary value relationship are shown
in Table 5-6.
TABLE 5-6: TEMPERATURE TO DIGITAL
VALUE CONVERSION
TABLE 5-7: TCN75’S REGISTER SET SUMMARY
D[15] D[14] D[13] D[12] D[11] D[10] D[9] D[8] D[7] D[6] D[5] D[4] D[3] D[2] D[1] D[0]
MSB D7 D6 D5 D4 D3 D2 D1 LSB XXXXX X X
D[15] D[14] D[13] D[12] D[11] D[10] D[9] D[8] D[7] D[6] D[5] D[4] D[3] D[2] D[1] D[0]
MSB D7 D6 D5 D4 D3 D2 D1 LSB XXXXX X X
D[15] D[14] D[13] D[12] D[11] D[10] D[9] D[8] D[7] D[6] D[5] D[4] D[3] D[2] D[1] D[0]
MSB D7 D6 D5 D4 D3 D2 D1 LSB XXXXX X X
Temperature Binary Value HEX Value
+125°C 0 11111010 0FA
+25°C 0 00110010 032
+0.5°C 0 00000001 001
0°C 0 00000000 00
0.5°C 1 11111111 1FF
-25°C 1 11001110 1CE
-40°C 1 10110000 1B0
-55°C 1 10010010 192
Name Description Width Read Write Notes
TEMP Ambient Temperature 16 X 2’s Complement Format
TSET Temperature Setpoint 16 XX2’s Complement Format
T
HYST
Temperature Hysteresis 16 XX2’s Complement Format
POINT Register Pointer 8 XX
CONFIG Configuration Register 8 XX
