DS1780 Datasheet, PDF (21/28 Pages) Dallas Semiconductor – CPU Peripheral Monitor

DS1780
VALUE RAM (ADDRESS 0x15h - 0x3Dh) Table 10.15
ADDRESS <A7:A0>h
20h
21h
22h
23h
24h
25h
26h
27h
28h
29h
2Ah
2Bh
2Ch
2Dh
2Eh
2Fh
30h
31h
32h
33h
34h
35h
36h
37h
38h
39h
3Ah
3Bh
3Ch
3Dh
3Eh
3Fh
R/W
R
R
R
R
R
R
R
R
R
R
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R
R
DESCRIPTION
+2.5V Input Reading.
V_CCP1 Input Reading.
+3.3V Input Reading.
+5V Input Reading.
+12V Input Reading.
+2.5V_Sense/V_CCP2 Input Reading.
Reserved.
Temperature reading (Most significant 8-bits).
FAN1 reading: This location stores the number of counts of the
internal clock per revolution.
FAN2 reading: This location stores the number of counts of the
internal clock per revolution.
Reserved.
+2.5V High Limit (Note 1, 2).
+2.5V Low Limit (Note 2).
+V_CCP1 High Limit (Note 1, 2).
+V _CCP1 Low Limit (Note 2).
+3.3V High Limit (Note 1, 2).
+3.3V Low Limit (Note 2).
+5V High Limit (Note 1, 2).
+5V Low Limit (Note 2).
+12V High Limit (Note 1, 2).
+12V Low Limit (Note 2).
+2.5V_Sense/Vccp2 High Limit (Note 1, 2).
+2.5V_Sense/Vccp2 Low Limit (Note 2).
Reserved.
Reserved.
Hot Temperature (High) Limit (Note 1).
Hot Temperature Hysteresis (Low) Limit.
FAN1 Fan Count Limit: It is the number of counts of the internal clock for the
Low Limit of the fan speed.
FAN2 Fan Count Limit: It is the number of counts of the internal clock for the
Low Limit of the fan speed.
Reserved.
Company id number (Note 5).
Stepping id number (Note 6).
NOTES:
1. Setting all 1s to the high limits for voltages and fans (0111 1111 binary for temperature) means
interrupts will never be generated except the case when voltages go below the low limits.
2. For the high limits of the voltages, the device is doing a greater than comparison. For the low limits,
however, it is doing a less than or equal comparison.
3. This register should only be used by the manufacturer for testing of the ASIC. Reading or writing to
this register during normal use may lead to erroneous events.
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