MFRC52201HN1/TRAYB NXP [NXP Semiconductors], MFRC52201HN1/TRAYB Datasheet - Page 43

• Manufacturer Part Number: MFRC52201HN1/TRAYB
• Description: Contactless reader IC
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
MFRC522_33
Product data sheet
PUBLIC
9.3.1.13 ControlReg register
Table 44.
Miscellaneous control bits.
Table 45.
Table 46.
Bit
7 to 6
5 to 0
Bit
Symbol
Access
Bit
7
6
5 to 3 reserved
2 to 0 RxLastBits[2:0]
Symbol
TStopNow
TStartNow
TStopNow TStartNow
Symbol
reserved
WaterLevel
[5:0]
WaterLevelReg register bit descriptions
ControlReg register (address 0Ch); reset value: 10h bit allocation
ControlReg register bit descriptions
W
7
Rev. 3 — 26 October 2009
Value Description
1
1
-
-
W
Description
reserved for future use
defines a warning level to indicate a FIFO buffer overflow or underflow:
Remark: to calculate values for HiAlert and LoAlert see
Section 9.3.1.8 on page
6
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
112133
timer stops immediately
reading this bit always returns it to 0
timer starts immediately
reading this bit always returns it to 0
reserved for future use
indicates the number of valid bits in the last received byte
if this value is zero, the whole byte is valid
5
reserved
4
-
40.
3
2
Contactless reader IC
RxLastBits[2:0]
MFRC522
© NXP B.V. 2009. All rights reserved.
R
1
43 of 96
0