AS3911 datasheet(85/149 Pages) AMSCO

85 / 149 page

ams Datasheet, Confidential: 2013-Oct [2-03]

AS3911 – 85

Appl icatio n I n f o rm a t i o n

Main Interrupt Register

Figure 71:

Main Interrupt Register

Notes:

1. At power-up and after Set Default command, content of this register is set to 0.

2. After Main Interrupt Register has been read, its content is set to 0, except for bits 1 and 0, which are set to 0 after corresponding

interrupt register is read.

Address 17h: Main Interrupt Register

Type: R

Bit

Name

Default

Function

Comments

7I_osc

IRQ when oscillator frequency is

stable

Set after oscillator is started

by setting Operation Control

I_wl

IRQ due to FIFO water level

Set during receive, informing

that FIFO is almost full and

has to be read out.

Set during transmit,

informing that FIFO is almost

empty and that additional

data has to be sent.

I_rxs

IRQ due to start of receive

I_rxe

IRQ due to end of receive

I_txe

IRQ due to end of transmission

I_col

IRQ due to bit collision

I_tim

IRQ due to timer or NFC event

Details are in Timer and NFC

Interrupt Register

0I_err

IRQ due to error and wake-up

timer

Details are in Error and

Wake-up Interrupt Register

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