PC87591L datasheet(182/437 Pages) NSC

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Embedded Controller Modules (Continued)

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182

Revision 1.07

Temperature Channel Control Register (TCHANCTL)

This register both controls the operation and indicates the status of the Temperature channel. TCHANCTL is set to 1016 on

reset.

Location: 00 FF3016

Type: Varies per bit

Temperature Channel Data Buffer (TCHANDAT)

This register (buffer) holds the data measured by the Temperature Channel.

Location: 00 FF3216

Type: RO

Bit

76543210

Name

DATVAL

RDMEASEN

INTDVEN

SELIN

Reset

00010000

Bit

Type

Description

4-0

SELIN (Selected Input). Indicates which temperature input was selected for measurement. If

RDMEASEN is set to 0, only the value 16 dec is read.

Bits

4 3 2 1 0

Description

0 1 1 1 1:

Remote diode (DP, DN pins) selected

1 0 0 0 0:

Local diode (internal) selected (default)

R/W

INTDVEN (Interrupt from Data Valid Enable). Temperature channel, Data Valid event (End-of-

conversion) enabled to the ADC Interrupt.

0: Disabled (default)

1: Enabled - ADC Interrupt from local DATVAL

R/W

RDMEASEN (Remote Diode Measurement Enable). Enables the temperature measurement using the

remote diode (REMDEN in ADCCNF register is set to 1). Using only the local diode enables a higher

measurement rate for the internal temperature. The temperature channel cannot be disabled

(“skipped”) since the internal temperature measurement is required.

0: Measurement disabled - only the local diode is measured by the temperature channel; forced into this

state when REMDEN in ADCCNF register is set to 0 (default).

1: Measurement enabled - the temperature channel measures both the remote and the local diodes in

successive cycles; possible only if REMDEN is set to 1.

R/W1C DATVAL (Data Valid). The Temperature Channel Data Buffer contains new data. The data may be read

immediately or at the end-of-cycle. This ﬂag is cleared when the ADC module is disabled (ADCEN in

ADCCNF register is cleared) or by writing 1 to it.

0: No valid data in TCHANDAT register (default)

1: End of conversion - new data is available in TCHANDAT

Bit

76543210

Name

TCHDAT

Bit

Description

7-0

TCHDAT (Temperature Channel Data). Temperature of either the remote or local diode, measured by the

Temperature Channel. For the temperature word format, see Section 4.11.4 on page 173. The data is valid and

may be read only at the end of the conversion, when DATVAL in TCHANCTL register is set to 1. DATVAL must

be reset after reading the data.

Range:

−128 to +127 (values are decimal); 8-bit, 2s complement value with 1 LSB = 1oC (the value at reset is

undeﬁned).

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