AS3955 datasheet(82/111 Pages) AMSCO

82 / 111 page

Page 82

ams Datasheet

Document Feedback

[v1-01] 2015-Apr-29

AS3955 − Register Description

Figure 94:

Buffer Status Register 1

Note(s) and/or Footnote(s):

1. Power-up and commands Set Default and Clear Buffer reset the content of this register to 0.

NFC Last Address Register

Figure 95:

Last NFC Address Access Register

Note(s) and/or Footnote(s):

1. Power-up and commands Set Default and Clear Buffer reset the content of this register to 0.

Address 0Dh:

Buffer Status Register 1

Bit

Name

Function

Type

7rfu

6rfu

5rf_busy

Extended mode buffer status flags (see Extended Mode);

io_busy flag is omitted since in this it is always zero when this

byte is read out

rf_data_rdy

io_data_rdy

2rfu

1buf_unf

Buffer underflow. Set when read more bytes then actual content

of buffer

0buf_ovr

Buffer overflow. Set when written more bytes then actual

content of buffer

Address 0Eh:

Last NFC Address Access

Bit

Name

Function

Type

last_addr<7>

Contains last address accessed by reader. Updated on internal

EEPROM access over RF. The address is 8 bit long and contains

also access attempts that are higher than the EEPROM address

space. Value FFh indicates that the value is being updated and

is not valid.

last_addr<6>

last_addr<5>

last_addr<4>

last_addr<3>

last_addr<2>

last_addr<1>

last_addr<0>

AS3955 датащи(PDF) 82 Page - ams AG

AS3955 датащи(HTML) 82 Page - ams AG

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 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

датащи скачать

ссылки URL