EM77950 datasheet(72/102 Pages) EMC

72 / 102 page

EM77950

BB Controller

•

Product Specification (V1.0) 10.09.2007

(This specification is subject to change without further notice)

Bit 7:

This flag enables/disables the CS interrupt.

CS flag in SSR negative edge triggers CS interrupt.

8.4.2 Interrupt Identification Register (IIR)

Name

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

IIR

EMPTY

RX_OF

LINK_

DIS

LOCK

OUT

LOCK

This is a read only register.

When the MCU accesses the IIR, all interrupts freeze. While the MCU access is

occurring, the system records the changes in the interrupts but waits until the MCU

access is complete before updating the register. A flag is active only when the

matching interrupt enable bit is set, and does not depend on the IE bit value. The flags

are set by H/W and cleared after the MCU reads the register.

Bit 0:

This bit reflects the LOCK IN flag interrupt when enabled by IER.

LOCK_IN interrupt is invoke whenever a PREAMBLE+NET_ID+NODE_ID

where recognized.

If NET_ID is disabled, then a received PREAMBLE+ NODE_ID invokes the

interrupt.

If NODE_ID is disabled, then a received PREAMBLE+ NET_ID invokes the

interrupt.

If NET_ID and NODE_ID are disabled, then a received PREAMBLE invokes

the interrupt.

Bit 1:

This bit reflects the LOCK OUT flag interrupt when enabled by IER.

LOCK_OUT interrupt is invoked whenever RFW-D100 has finished receiving a

packet. The end of the packet is determined according to the packet size.

Bit 2:

This bit reflects the LINK_DIS flag interrupt when enabled by IER.

This interrupt is invoked by the zero counter capacitor discharge mechanism.

Bit 3:

This bit reflects the RX_OF flag interrupt when enabled by IER.

Bit 4:

This bit reflects the TX EMPTY flag interrupt when enabled by IER.

Bit 5:

This bit reflects the RX FIFO AF flag interrupt when enabled by IER.

Bit 6:

This bit reflects the TX FIFO AE flag interrupt when enabled by IER.

Bit 7:

CS – when CS flag goes from “1” to “0”, an interrupt is invoked.

EM77950 Datasheet(PDF) 72 Page - ELAN Microelectronics Corp

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