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MFRC522 数据表(PDF) 59 Page - NXP Semiconductors

部件名 MFRC522
功能描述  Contactless reader IC
PDF  96 Pages
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制造商  NXP [NXP Semiconductors]
网页  http://www.nxp.com
标志 NXP - NXP Semiconductors

MFRC522 数据表(HTML) 59 Page - NXP Semiconductors

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MFRC522_33
© NXP B.V. 2009. All rights reserved.
Product data sheet
PUBLIC
Rev. 3 — 26 October 2009
112133
59 of 96
NXP Semiconductors
MFRC522
Contactless reader IC
Remark: The reload value bits are contained in two 8-bit registers.
9.3.3.12
TCounterValReg register
Contains the timer value.
Remark: The timer value bits are contained in two 8-bit registers.
Table 109. TReloadReg (higher bits) register (address 2Ch); reset value: 00h bit allocation
Bit
7
6
5
4
3
2
1
0
Symbol
TReloadVal_Hi[7:0]
Access
R/W
Table 110. TReloadReg register higher bit descriptions
Bit
Symbol
Description
7 to 0
TReloadVal_Hi
[7:0]
defines the higher 8 bits of the 16-bit timer reload value
on a start event, the timer loads the timer reload value
changing this register affects the timer only at the next start event
Table 111. TReloadReg (lower bits) register (address 2Dh); reset value: 00h bit allocation
Bit
7
6
5
4
3
2
1
0
Symbol
TReloadVal_Lo[7:0]
Access
R/W
Table 112. TReloadReg register lower bit descriptions
Bit
Symbol
Description
7 to 0
TReloadVal_Lo
[7:0]
defines the lower 8 bits of the 16-bit timer reload value
on a start event, the timer loads the timer reload value
changing this register affects the timer only at the next start event
Table 113. TCounterValReg (higher bits) register (address 2Eh); reset value: xxh bit
allocation
Bit
7
6
5
4
3
2
1
0
Symbol
TCounterVal_Hi[7:0]
Access
R
Table 114. TCounterValReg register higher bit descriptions
Bit
Symbol
Description
7 to 0
TCounterVal_Hi
[7:0]
timer value higher 8 bits
Table 115. TCounterValReg (lower bits) register (address 2Fh); reset value: xxh bit
allocation
Bit
7
6
5
4
3
2
1
0
Symbol
TCounterVal_Lo[7:0]
Access
R



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