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參數(shù)資料
| 型號： | MFRC53101T |
| 廠商： | NXP Semiconductors N.V. |
| 元件分類： | 通信及網(wǎng)絡 |
| 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)： | 75/116頁 |
| 文件大?。?/td> | 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
75 of 116
NXP Semiconductors
MFRC531
ISO/IEC 14443 reader IC
11.1.1
Basic states
11.1.2
StartUp command 3Fh
Table 130. StartUp command 3Fh
Command
Value
Remark:
This command can only be activated by a Power-On or Hard reset.
The StartUp command runs the reset and initialization phases. It does not need or return,
any data. It cannot be activated by the microprocessor but is automatically started after
one of the following events:
Power-On Reset (POR) caused by power-up on pin DVDD
POR caused by power-up on pin AVDD
Negative edge on pin RSTPD
The reset phase comprises an asynchronous reset and configuration of certain register
bits. The initialization phase configures several registers with values stored in the
EEPROM.
When the StartUp command finishes, the Idle command is automatically executed.
Remark:
The microprocessor must not write to the MFRC531 while it is still executing the
StartUp command. To avoid this, the microprocessor polls for the Idle command to
determine when the initialization phase has finished; see
Section 9.7.4 on page 28
.
When the StartUp command is active, it is only possible to read from the Page 0
register.
The StartUp command cannot be interrupted by the microprocessor.
11.1.3
Idle command 00h
Table 131. Idle command 00h
Command
Value
The Idle command switches the MFRC531 to its inactive state where it waits for the next
command. It does not need or return, any data.
The device automatically enters the idle state when a command finishes. When this
happens, the MFRC531 sends an interrupt request by setting bit IdleIRq. When triggered
by the microprocessor, the Idle command can be used to stop execution of all other
commands (except the StartUp command) but this does not generate an interrupt request
(IdleIRq).
Remark:
Stopping command execution with the Idle command does not clear the FIFO
buffer.
Action
Arguments
and data
-
Returned
data
-
StartUp
3Fh
runs the reset and initialization phase
Action
Arguments
and data
-
Returned
data
-
Idle
00h
no action; cancels current command
execution
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