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| 型號(hào)： | MFRC53101T |
| 廠商： | NXP Semiconductors N.V. |
| 元件分類： | 通信及網(wǎng)絡(luò) |
| 英文描述： | ISO-IEC 14443 reader IC |
| 封裝： | MFRC53101T/0FE<SOT287-1 (SO32)|<<http://www.nxp.com/packages/SOT287-1.html<1<week 51, 2004,;MFRC53101T/0FE<SOT287-1 (SO32)|<<http://www.nxp.com/packages/SOT287-1.html< |
| 文件頁數(shù)： | 82/116頁 |
| 文件大小： | 862K |
| 代理商： | MFRC53101T |
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MFRC531_34
NXP B.V. 2010. All rights reserved.
Product data sheet
PUBLIC
Rev. 3.4 — 26 January 2010
056634
82 of 116
NXP Semiconductors
MFRC531
ISO/IEC 14443 reader IC
11.2.3
Transceive command 1Eh
Table 137. Transceive command 1Eh
Command
Value
The Transceive command first executes the Transmit command (see
Section 11.2.1 on
page 76
) and then starts the Receive command (see
Section 11.2.2 on page 79
). All data
transmitted is sent using the FIFO buffer and all data received is written to the FIFO buffer.
The Transceive command can only be started by the microprocessor.
Remark:
To adjust the timing relationship between transmitting and receiving, use the
RxWait register. This register is used to define the time delay between the last bit
transmitted and activation of the receiver. In addition, the BitPhase register determines the
phase-shift between the transmitter and receiver clock.
11.2.4
States of the card communication
The status of the transmitter and receiver state machine can be read from bits
ModemState[2:0] in the PrimaryStatus register.
The assignment of ModemState[2:0] to the internal action is shown in
Table 138
.
Table 138. Meaning of ModemState
ModemState
[2:0]
000
Idle
001
TxSOF
010
TxData
Action
Arguments
and data
data stream
Returned
data
data stream
Transceive
1Eh
transmits data from FIFO buffer to the card
and then automatically activates the
receiver
State
Description
transmitter and/or receiver are not operating
transmitting the SOF pattern
transmitting data from the FIFO buffer (or redundancy CRC check
bits)
transmitting the EOF pattern
intermediate state passed, when receiver starts
intermediate state passed, when receiver finishes
waiting until the RxWait register time period expires
receiver activated; waiting for an input signal on pin RX
011
100
TxEOF
GoToRx1
GoToRx2
PrepareRx
AwaitingRx
101
110
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