Dynamic Engineering IP-CF Benutzerhandbuch - Seite 10

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Status Register

Ip_cf_stat $04 IP-CF Status read/write

DATA BIT

15-9

7-6

5-4

FIGURE 3

Bits marked '0' are set to '0'. Bits marked undefined are used for special purposes and

will not return predicable status – should be masked off.

CD are the Card Detect bits for the two potential CompactFLASH devices. The internal

socket is device 1. The card detect bits can be used to determine if a CompactFLASH

device is installed. The bits are active low => "00" when a card is installed and "11"

when no device is present. The type of device installed can be read from the Identify

Drive table located within the CompactFLASH device.

IREQ is the interrupt request from the CompactFLASH before it is gated with the master

interrupt enable. The interrupt can be polled from the status register if non – interrupt

driven operation is preferred.

Passed Diagnostics and Device Active Slave Present are status signals created by the

CompactFLASH device(s) and read through the status register. For an exact definition

of the bits please refer to the CompactFLASH manual.

Direct Data

E m b e d d e d

DESCRIPTION

undefined read-only

'0'

CD22-CD21 external device

CD12-CD11 internal device

'0'

IREQ

PDIAG – Passed Diagnostics

DASP – Device Active Slave Present

IP-CF STATUS BIT MAP

S o l u t i o n s

P g

1 0

o f

2 0