ST25R3916 datasheet(117/157 Pages) STMICROELECTRONICS

117 / 157 page

DS12484 Rev 4

117/157

ST25R3916/7

Application information

156

4.5.54

External field detector deactivation threshold register

Address: 2Bh

Type: RW

3.160

115

21.3

3.241

116

23.3

3.325

117

25.6

3.413

118

28.4

3.507

119

32.0

3.606

120

36.6

3.657

121

42.7

3.710

122

51.2

3.765

123

64.0

3.821

124

85.3

3.879

125

128

3.938

126

256

4.000

127

High Z

1. The value has to be multiplied by the RFO resistance from Section 5.4: Electrical characteristics to obtain the driver output

resistance for the corresponding md_res setting.

Table 85. Resistive AM modulated state driver output resistance (continued)

md_res<6:0>

Driver output resistance RRFO

(normalized)(1)

md_res<6:0>

Driver output resistance RRFO

(normalized)(1)

Table 86. External field detector deactivation threshold register

Bit

Name

Default

Function

Comments

RFU

Not used

trg_ld2

Deactivation peer detection

threshold (see Table 87).

trg_ld1

trg_ld0

rfe_td3

Deactivation collision avoidance

threshold (see Table 88).

rfe_td2

rfe_td1

rfe_td0

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