CD1284 Datasheet, PDF (45/176 Pages) Intel Corporation – IEEE 1284-Compatible Parallel Interface Controller with Two High-Speed Asynchronous Serial Ports

IEEE 1284-Compatible Parallel Interface Controller — CD1284
Figure 7. Interrupt Generation Logic
KEY:[ ] = Current mode
{ } = Interface extensibility request value (see IEEE1284
Spec. for more details)
(register name[x]) : x = bit #, that is PCIER[1] = PCIER, bit 1
FAILED NEG
(INVALID
EXTCODE)
[COMPATIBLE
MODE]
NSR=0x41
TERMINATION
[COMPATIBLE
MODE]
NEG-OK
NSR=0x82
NEG-OK
IDREQ
PCIER[1]
NSR=0x89[RN ID REQUEST]{04}
NSR=0x8B[RB ID REQUEST]{05}
NSR=0x8D[ECP w/o RLE ID
REQUEST]{14}
NSR=0x8F[ECP w/ RLE ID
REQUEST]{34}
NSR=0x46 (EPP)
NSR=0x48 (RN)
NSR=0x49 (RN-ID)
NSR=0x4A (RB)
NSR=0x4B (RB-ID)
NSR=0x4C (ECP)
NSR=0x4D (ECP-ID)
NSR=0x4E (ECP-RLE)
NSR=0x4F (ECP-RLE-ID)
NSR=0x86[EPP
MODE]{40}
NSR=0x88[RN MODE]
{00} NSR=0x8A[RB
NSR=0x22 ^MODE]{01}
NSR=0x8C[ECP w/o
RLE]{10}
NSR=0x8E[ECP w/
RLE]{30}
NSR=0x16 (EPP)
NSR=0x18 (RN)
NEGCH
PCIER[5]
NSR=0x19 (RN-ID)
NSR=0x1A (RB)
NSR=0x1B (RB-ID)
NSR=0x1C (ECP)
NSR=0x1D (ECP-ID)
NSR=0x1E (ECP-RLE)
NSR=0x1F (ECP-RLE-ID)
IDREQ
PCISR[1]
NEGCH
PCISR[5]
FAILED NEG
MODE NOT
ENABLED
[COMPATIBLE
MODE]
HOST-TIMEOUT
HOST HAS NOT RESPONDED
FOR OVER 1 SEC.)
[COMPATIBLE MODE]
ID requests will fail if either the negotiation type or RID is
disabled in NER. Other negotiations will also fail if the
negotiation type is disabled.
INVALID/ImedTerm
HOST HAS VIOLATED
HANDSHAKING SEQUENCE
[COMPATIBLE MODE]
An immediate termination from the Host will
generate this interrupt
Datasheet
45