ST25R100 datasheet(49/86 Pages) STMICROELECTRONICS

49 / 86 page

5.13.31

NRT GPT configuration register

Address: 1Eh

Type: RW

Domain: RD

Table 46. NRT GPT configuration register

Bit

Name

Default

Function

Comment

RFU

gptc2

Defines the GPT trigger source (see Table 47)

gptc1

gptc0

RFU

nrt_emd

0: Normal mode of NRT

1: EMD mode of NRT

When enabled, NRT produces an IRQ when it expires

independent of the reception.

nrt_step

0: 64/fc (4.72 μs)

1: 4096/fc (~302 μs)

Table 47. GPT trigger sources

gptc<2:0>

gptc2

gptc1

gptc0

Trigger source

No trigger source

Starts at the end of reception (RXE)

Starts at start of reception (RXS)

Starts at end of transmission (TXE)

Other combinations

RFU

Note:

The GPT timer can always be started manually by execution of the direct command start GPT.

5.13.32

No-response timer register 1

Address: 1Fh

Type: RW

Domain: RD

Table 48. No-response timer register 1

Bit Name Default

Function

Comment

nrt15

No-response timer definition MSB

nrt_step = 0:

•

Step: 64 / fc (4.72 μs)

•

Range: 64 / fc (~4.72 μs) to 16320 / fc

(~309.3 ms)

nrt_step = 1:

•

Step: 4096 / fc (302 μs)

•

Range: 4096 / fc (~302 μs) to 268431360 / fc

(~19.8 s)

Defines the timeout after the end of transmission

until when the reception may start.

In case this timeout expires without detecting a

response, a I_nre IRQ is produced.

When nrt_emd=1 the IRQ is produced regardless

of the reception.

In case nrt<15:0>=0 the NRT is not started.

nrt14

nrt13

nrt12

nrt11

nrt10

nrt9

nrt8

ST25R100

Application information

DS14139 - Rev 5

page 49/86

ST25R100 数据表(PDF) 49 Page - STMicroelectronics

ST25R100 数据表(HTML) 49 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86

数据表下载