pc87591l National Semiconductor Corporation, pc87591l Datasheet - Page 182

• Manufacturer Part Number: pc87591l
• Description: Lpc Mobile Embedded Controllers
• Manufacturer: National Semiconductor Corporation

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Embedded Controller Modules
Temperature Channel Control Register (TCHANCTL)
This register both controls the operation and indicates the status of the Temperature channel. TCHANCTL is set to 10
reset.
Location: 00 FF30
Type: Varies per bit
Temperature Channel Data Buffer (TCHANDAT)
This register (buffer) holds the data measured by the Temperature Channel.
Location: 00 FF32
Type: RO
Bit
Name
Reset
Bit
Name
7-0
Bit
4-0
Bit
5
6
7
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 = 1
R/W1C DATVAL (Data Valid). The Temperature Channel Data Buffer contains new data. The data may be read
Type
R/W
R/W
RO
undefined).
DATVAL
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
0 1 1 1 1:
1 0 0 0 0:
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
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
1: Measurement enabled - the temperature channel measures both the remote and the local diodes in
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
16
16
7
0
7
state when REMDEN in ADCCNF register is set to 0 (default).
successive cycles; possible only if REMDEN is set to 1.
RDMEASEN INTDVEN
6
0
6
Description
Remote diode (DP, DN pins) selected
Local diode (internal) selected (default)
(Continued)
5
0
5
Description
182
4
1
4
Description
TCHDAT
3
0
3
SELIN
2
0
2
o
C (the value at reset is
1
0
1
Revision 1.07
0
0
0
16
on