MFRC522 datasheet(39/109 Pages) NXP

39 / 109 page

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Product data sheet

Rev. 3.2 — 22 May 2007

39 of 109

NXP Semiconductors

MFRC522

Contactless Reader IC

9.2.3.12

TCounterValReg

Contains the current value of the timer.

Remark: The Counter value is split into two 8-bit register.

9.2.4 Page 3: Test

9.2.4.1

Reserved

Functionality is reserved for further use.

Table 99:

TCounterValReg (Higher bits) register (address 2Eh); reset value: XXh

Bit

Symbol

TCounterVal_Hi

Access

Rights

Table 100: Description of higher TCounterValReg bits

Bit

Symbol

Description

7 to 0

TCounterVal_Hi

Current value of the timer, higher 8 bits.

Table 101: TCounterValReg (Lower bits) register (address 2Fh); reset value: XXh

Bit

Symbol

TCounterVal_Lo

Access

Rights

Table 102: Description of lower TCounterValReg bits

Bit

Symbol

Description

7 to 0

TCounterVal_Lo

Current value of the timer, lower 8 bits.

Table 103: Reserved register (address 30h); reset value: 00h

Bit

Symbol

Access

Rights

RFU

Table 104: Description of Reserved register bits

Bit

Symbol

Description

7 to 0

Reserved for future use.

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