AS3955 datasheet(75/111 Pages) AMSCO

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[v1-01] 2015-Apr-29

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AS3955 − Register Description

The 6-bit register addresses below are defined in hexadecimal

notation. The possible address range is from 00h to 3Fh.

There are two types of registers implemented in AS3955:

configuration registers and display registers. The configuration

registers are used to configure AS3955. They can be written and

read through SPI / I²C (RW). The display registers are read-only

(RO); they contain information about AS3955 internal state,

which can be accessed through SPI / I²C.

Registers Overview

Figure 82:

List of the SPI / I²C Internal Registers

Address [hex]

Content

Comment

Type

IO Configuration Register

IC Configuration Register 0

Default: IC_CFG0

RO/RW

IC Configuration Register 1

Default: IC_CFG1

IC Configuration Register 2

Default: IC_CFG2+ battery supply

enable

RO/RW

RFID Status Display Register

IC Status Display Register

Mask Interrupt Register 0

Default: MIRQ_0

Mask Interrupt Register 1

Default: MIRQ_1

Interrupt Register 0

Interrupt Register 1

Buffer Status Register 2

Buffer Status Register 1

Last NFC Address Access

Version Control – Major

Revision

Version Control – Minor

Revision

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