DS1780 Просмотр технического описания (PDF) - Maxim Integrated

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производитель

DS1780

CPU Peripheral Monitor

Maxim Integrated 

DS1780

TEMPERATURE CONFIGURATION REGISTER (ADDRESS Ox4B; POWER-UP

DEFAULT = 01h) Table 10.12

BIT NAME R/W

DESCRIPTION

If Bits 0 and Bits 1 of this register are both 0 or both 1, this selects the default interrupt

mode which gives the user an interrupt if the temperature goes above the hot limit. The

interrupt will be cleared once the status register is read, but it will again be generated when

the next conversion has completed. It will continue to do so until the temperature goes

Hot

below the hysteresis limit.

Temperature

0

Interrupt R/W A 0 on Bit 1 and a 1 on Bit 0 selects the one-time interrupt mode which gives the user an

mode select

indefinite interrupt when it goes above the hot limit. The interrupt will be cleared once the

Bit 0

status register is read. Another interrupt will not be generated until the temperature first goes

below the hysteresis limit. It will also be cleared if the status register is read. No more

interrupts will be generated until the temperature goes above the hot limit again. The

corresponding bit will be cleared in the status register every time it is read but may not set

again when the next conversion is done.

1

Hot

Temperature

Interrupt

mode select

Bit 1

A 1 on this bit (Bit 1) and a 0 on Bit 0 selects the comparator mode. This gives an SMI

R/W

when the temperature exceeds the hot limit. This SMI remains active until the status register

is read or the temperature goes below the hot limit (no hysteresis), when the SMI will

become inactive.

2-6 Reserved R/W Default = 00000.

7

Temp [0]

R Ninth bit of the temperature (Value = 0.5°C).

TEST REGISTER (ADDRESS 0x15h; POWER-UP DEFAULT = 00h)

Table 10.13

ADDRESS <A7:0A>h R/W

DESCRIPTION

15h

Note 3 Power-up Default = 00h

ANALOG OUTPUT (ADDRESS 0x19h; POWER-UP DEFAULT = FFh)

Table 10.14

ADDRESS <A7:0A>h R/W

DESCRIPTION

19h

R/W

Power-up Default = FFh. No other reset affects this register. FFh

value set analog out to MAX value = 1.25V.

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