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| 型號： | MFRC52201HN1 |
| 廠商： | NXP Semiconductors N.V. |
| 元件分類： | 通信及網(wǎng)絡 |
| 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)： | 19/92頁 |
| 文件大?。?/td> | 691K |
| 代理商： | MFRC52201HN1 |
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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
19 of 92
NXP Semiconductors
MFRC522
Contactless reader IC
8.1.4.7
Register read access
To read out data from a specific register address in the MFRC522, the host controller must
use the following procedure:
Firstly, a write access to the specific register address must be performed as indicated
in the frame that follows
The first byte of a frame indicates the device address according to the I
2
C-bus rules
The second byte indicates the register address. No data bytes are added
The Read/Write bit is 0
After the write access, read access can start. The host sends the device address of the
MFRC522. In response, the MFRC522 sends the content of the read access register. In
one frame all data bytes can be read from the same register address. This enables fast
FIFO buffer access or register polling.
The Read/Write (R/W) bit is set to logic 1.
Fig 17. Register read and write access
001aak592
S
A
0
0
I
2
C-BUS
SLAVE ADDRESS
[A7:A0]
JOINER REGISTER
ADDRESS [A5:A0]
write cycle
0
(W)
A
DATA
[7:0]
[0:n]
[0:n]
[0:n]
A
P
S
A
0
0
I
2
C-BUS
SLAVE ADDRESS
[A7:A0]
JOINER REGISTER
ADDRESS [A5:A0]
read cycle
optional, if the previous access was on the same register address
0
(W)
A
P
P
S
S
start condition
P
stop condition
A
acknowledge
A
not acknowledge
W
write cycle
R
read cycle
A
I
2
C-BUS
SLAVE ADDRESS
[A7:A0]
sent by master
sent by slave
DATA
[7:0]
1
(R)
A
DATA
[7:0]
A
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相關代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MFRC52201HN1,115 | 功能描述:RFID應答器 RoHS:否 制造商:Murata 存儲容量:512 bit 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體: 封裝:Reel |
| MFRC52201HN1,118 | 功能描述:RFID應答器 RoHS:否 制造商:Murata 存儲容量:512 bit 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體: 封裝:Reel |
| MFRC52201HN1,151 | 功能描述:RFID應答器 Contactless Reader 32-Pin RoHS:否 制造商:Murata 存儲容量:512 bit 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體: 封裝:Reel |
| MFRC52201HN1,157 | 功能描述:RFID應答器 CL READER IC’S RoHS:否 制造商:Murata 存儲容量:512 bit 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體: 封裝:Reel |
| MFRC52201HN1/TRAYB | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Contactless reader IC |
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