參數(shù)資料
型號: MFRC52201HN1
廠商: NXP Semiconductors N.V.
元件分類: 通信及網(wǎng)絡(luò)
英文描述: Contactless reader IC
封裝: MFRC52201HN1<SOT617-1 (HVQFN32)|<<http://www.nxp.com/packages/SOT617-1.html<1<Always Pb-free,;MFRC52201HN1<SOT617-1 (HVQFN32)|<<http://www.nxp.com/packages/SOT617-1.html&
文件頁數(shù): 43/92頁
文件大?。?/td> 691K
代理商: MFRC52201HN1
MFRC522_35
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2010. All rights reserved.
Product data sheet
PUBLIC
Rev. 3.5 — 21 June 2010
112135
43 of 92
NXP Semiconductors
MFRC522
Contactless reader IC
Table 44.
Bit
7 to 6
5 to 0
9.3.1.13
ControlReg register
Miscellaneous control bits.
Table 45.
Bit
Symbol
Access
Table 46.
Bit
7
WaterLevelReg register bit descriptions
Symbol
Description
reserved
reserved for future use
WaterLevel
[5:0]
Status1Reg register’s HiAlert bit is set to logic 1 if the remaining
number of bytes in the FIFO buffer space is equal to, or less than the
defined number of WaterLevel bytes
Status1Reg register’s LoAlert bit is set to logic 1 if equal to, or less
than the WaterLevel bytes in the FIFO buffer
Remark:
to calculate values for HiAlert and LoAlert see
Section 9.3.1.8 on page 40
.
defines a warning level to indicate a FIFO buffer overflow or underflow:
ControlReg register (address 0Ch); reset value: 10h bit allocation
7
6
5
TStopNow
TStartNow
W
W
4
3
2
1
0
reserved
-
RxLastBits[2:0]
R
ControlReg register bit descriptions
Symbol
Value
TStopNow
1
Description
timer stops immediately
reading this bit always returns it to logic0
timer starts immediately
reading this bit always returns it to logic 0
reserved for future use
indicates the number of valid bits in the last received byte
if this value is 000b, the whole byte is valid
6
TStartNow
1
5 to 3
2 to 0
reserved
RxLastBits[2:0]
-
-
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