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TPC512x

12-bit 1-MHz SAR ADC

0

GPIO1 pin is configured as a general-purpose input. The setting is not allowed

for QFN packaged devices.

DI00

0

1

GPIO0 pin is configured as a general-purpose output. Valid setting for QFN

packaged devices.

0

GPIO0 pin is configured as a general-purpose input. Valid setting for QFN

packaged devices.

Table 10 Grouping of Alarm Program Registers

Group No.

Registers

Applicable for Device

0

High and low alarms for channels 0, 1, 2, and 3

TPC5120

1

High and low alarms for channels 4, 5, 6, and 7

TPC5120, TPC5121

2

High and low alarms for channels 8, 9, 10, and 11

TPC5120

3

High and low alarms for channels 12, 13, 14, and 15

TPC5120

Table 11 Alarm Program Register Settings

Bits

Reset

State

Logic

State

Function

FRAME 1

DI15-12

NA

1100

Device enters ‘alarm programming sequence’ for group 0

1101

Device enters ‘alarm programming sequence’ for group 1

1110

Device enters ‘alarm programming sequence’ for group 2

1111

Device enters ‘alarm programming sequence’ for group 3

Note: DI15-12 = 11bb is the alarm programming request for group bb. Here ‘bb’ represents the alarm programming group

number in binary format.

DI11-14

NA

Do not care

FRAME 2 AND ONWARDS

DI15-14

NA

cc

Where “cc” represents the lower two bits of the channel number in binary

format. The device programs the alarm for the channel represented by

the binary number “bbcc”. “bb” is programmed in the first frame.

DI13

NA

1

High alarm register selection

0

Low alarm register selection

DI12

NA

0

Continue the alarm programming sequence in the next frame

1

Exit Alarm Programming in the next frame. Note: If the alarm

programming sequence is not terminated using this feature, then the

device will remain in the alarm programming sequence state and all SDI

data will be treated as alarm thresholds.

DI11-10

NA

xx

Do not care

DI09-00

All ones for

high alarm

register and all

zeros for low

alarm register

This 10-bit data represents the alarm threshold. The 10-bit alarm threshold is compared

with the upper 10-bit word of the 12-bit conversion result. The device sets off an alarm

when the conversion result is higher (High Alarm) or lower (Low Alarm) than this number.

For 10-bit devices, all 10 bits of the conversion result are compared with the set threshold.

For 8-bit devices, all 8 bits of the conversion result are compared with DI09 to DI02 and

DI00, and 01 are 'do not care'.