參數(shù)資料
型號: MFRC50001T
廠商: NXP Semiconductors N.V.
元件分類: 通信及網(wǎng)絡(luò)
英文描述: Highly integrated ISO-IEC 14443 A reader IC
封裝: MFRC50001T/0FE<SOT287-1 (SO32)|<<http://www.nxp.com/packages/SOT287-1.html<1<week 15, 2005,;
文件頁數(shù): 45/110頁
文件大?。?/td> 841K
代理商: MFRC50001T
MFRC500_33
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2010. All rights reserved.
Product data sheet
PUBLIC
Rev. 3.3 — 15 March 2010
048033
45 of 110
NXP Semiconductors
MFRC500
Highly Integrated ISO/IEC 14443 A Reader IC
10.5.1.4
PrimaryStatus register
Bits relating to receiver, transmitter and FIFO buffer status flags.
Table 39.
Bit
Symbol
Access
Table 40.
Bit
7
6 to 4 ModemState[2:0]
PrimaryStatus register (address: 03h) reset value: 0000 0101b, 05h bit allocation
7
6
5
4
0
ModemState[2:0]
IRq
R
R
3
2
1
0
Err
R
HiAlert
R
LoAlert
R
R
PrimaryStatus register bit descriptions
Symbol
Value Status
0
-
Description
reserved
shows the state of the transmitter and receiver
state machines:
neither the transmitter or receiver are operating;
neither of them are started or have input data
transmit start of frame pattern
000
Idle
001
TxSOF
010
TxData
transmit data from the FIFO buffer (or
redundancy CRC check bits)
transmit End Of Frame (EOF) pattern
011
TxEOF
100
GoToRx1
GoToRx2
PrepareRx
intermediate state 1; receiver starts
intermediate state 2; receiver finishes
waiting until the RxWait register time period
expires
receiver activated; waiting for an input signal on
pin RX
receiving data
101
110
AwaitingRx
111
Receiving
3
IRq
-
shows any interrupt source requesting attention
based on the InterruptEn register flag settings
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
(
=
2
1
Err
HiAlert
1
1
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
)
WaterLevel
WaterLevel
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