ST25R100 datasheet(56/86 Pages) STMICROELECTRONICS

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Bit Name Default

Function

Comment

8-bit signed reference

Range: -128 to 127

If iq_aaref = 1 the reference is automatically calculated, and this register is RO.

When iq_aaref = 0 the reference shall be set manually, and this register

becomes RW

i_ref5

i_ref4

i_ref3

i_ref2

i_ref1

i_ref0

5.13.47

I-Channel WU display calibration register

Address: 2Eh

Type: RO

Domain: PD

Table 65. I-Channel WU display calibration register

Bit

Name

Default

Function

Comment

i_cal7

8-bit unsigned calibration result

i_cal6

i_cal5

i_cal4

i_cal3

i_cal2

i_cal1

i_cal0

5.13.48

Q-Channel WU configuration register

Address: 2Fh

Type: RW

Domain: PD

Table 66. Q-Channel WU configuration register

Bit

Name

Default

Function

Comment

RFU

q_iirqm

0: Exclude the IRQ measurement

1: Include the IRQ measurement

Includes/excludes the measurement that causes

IRQ when auto-averaging is enabled

q_aaw1

00: 4

01: 8

10: 16

11: 32

Defines the weight of last measurement result for

auto-averaging

q_aaw0

RFU

q_tdi_en2

1: IRQ if q_adc > q_ref + q_diff

q_tdi_en<2:0> = 0 Wake-up Q-channel disabled

q_tdi_en1

1: IRQ if q_ref - q_diff ≤ q_adc ≤ q_ref + q_diff

q_tdi_en0

1: IRQ if q_adc < q_ref - i_diff

ST25R100

Application information

DS14139 - Rev 5

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