?2006 Microchip Technology Inc.
DS21490C-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 2s complement binary format such that a read-
ing of 000000000b corresponds to 0癈. 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:
TCN75S 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
X
X
X
X
X
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
X
X
X
X
X
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
X
X
X
X
X
X
X
Temperature Binary Value
HEX Value
+125癈
0 11111010
0FA
+25癈
0 00110010
032
+0.5癈
0 00000001
001
0癈
0 00000000
00
0.5癈
1 11111111
1FF
-25癈
1 11001110
1CE
-40癈
1 10110000
1B0
-55癈
1 10010010
192
Name
Description
Width
Read
Write
Notes
TEMP
Ambient Temperature
16
X
2s Complement Format
TSET
Temperature Setpoint
16
X
X
2s Complement Format
T
HYST
Temperature Hysteresis
16
X
X
2s Complement Format
POINT
Register Pointer
8
X
X
CONFIG
Configuration Register
8
X
X
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