AT89C5122D-RDRUM datasheet(168/208 Pages) ATMEL

168 / 208 page

168

AT83R5122, AT8xC5122/23

4202F–SCR–07/2008

Reset Value = 0000 0000b

Table 107.

Interrupt Enable Register - ISEL (S:A1h)

7654

3210

CPLEV

PRESIT

RXIT

OELEV

OEEN

PRESEN

RXEN

Bit

Number

Bit

Mnemonic

Description

CPLEV

Card presence detection level

This bit indicates which CPRES level will bring about an interrupt

Set this bit to indicate that Card Presence IT will appear if CPRES is at high

level.

Clear this bit to indicate that Card Presence IT will appear if CPRES is at low

level.

Reserved

The value read from this bit is indeterminate. Do not change this bit.

PRESIT

Card presence detection interrupt flag

Set by hardware

Must be cleared by software

RXIT

Received data interrupt flag

Set by hardware

Must be cleared by software

OELEV

INT1 signal active level

Set this bit to indicate that high level is active.

Clear this bit to indicate that low level is active.

OEEN

INT1 Interrupt Disable bit

Clear to disable INT1 interrupt

Set to enable INT1 interrupt

PRESEN

Card presence detection Interrupt Enable bit

Clear to disable the card presence detection interrupt coming from SCIB.

Set to enable the card presence detection interrupt coming from SCIB.

RXEN

Received data Interrupt Enable bit

Clear to disable the RxD interrupt.

Set to enable the RxD interrupt (a minimal bit width of 100

μs is required to

wake up from power-down) .

AT89C5122D-RDRUM 数据表(PDF) 168 Page - ATMEL Corporation

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