參數(shù)資料
型號: MFRC53001T
廠商: NXP Semiconductors N.V.
元件分類: 通信及網(wǎng)絡(luò)
英文描述: ISO-IEC 14443 A Reader IC
封裝: MFRC53001T/0FE<SOT287-1 (SO32)|<<http://www.nxp.com/packages/SOT287-1.html<1<week 5, 2005,;MFRC53001T/0FE<SOT287-1 (SO32)|<<http://www.nxp.com/packages/SOT287-1.html<1
文件頁數(shù): 48/115頁
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代理商: MFRC53001T
MFRC530_33
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NXP B.V. 2010. All rights reserved.
Product data sheet
PUBLIC
Rev. 3.3 — 6 July 2010
057433
48 of 115
NXP Semiconductors
MFRC530
ISO/IEC 14443 A Reader IC
10.5.1.5
FIFOLength register
Number of bytes in the FIFO buffer.
Table 47.
Bit
Symbol
Access
Table 48.
Bit
7
6 to 0 FIFOLength[6:0]
2
1
Err
HiAlert
1
1
any error flag in the ErrorFlag register is set
the alert level for the number of bytes in the FIFO
buffer (FIFOLength[6:0]) is:
HiAlert
64
FIFOLength
(
=
otherwise value = logic 0
Example:
FIFOLength = 60, WaterLevel = 4 then
HiAlert = logic 1
FIFOLength = 59, WaterLevel = 4 then
HiAlert = logic 0
the alert level for number of bytes in the FIFO
buffer (FIFOLength[6:0]) is:
LoAlert
FIFOLength
=
0
LoAlert
1
otherwise
value = logic 0
Example:
FIFOLength = 4, WaterLevel = 4 then
LoAlert = logic 1
FIFOLength = 5, WaterLevel = 4 then
LoAlert = logic 0
Table 46.
Bit
PrimaryStatus register bit descriptions
…continued
Symbol
Value Status
Description
)
WaterLevel
WaterLevel
FIFOLength register (address: 04h) reset value: 0000 0000b, 00h bit allocation
7
6
5
0
R
4
3
2
1
0
FIFOLength[6:0]
R
FIFOLength bit descriptions
Symbol
0
Description
reserved
gives the number of bytes stored in the FIFO buffer. Writing
increments the FIFOLength register value while reading decrements
the FIFOLength register value
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