SCD1284 INTEL [Intel Corporation], SCD1284 Datasheet - Page 45

• Manufacturer Part Number: SCD1284
• Description: IEEE 1284-Compatible Parallel Interface Controller with Two High-Speed Asynchronous Serial Ports
• Manufacturer: INTEL [Intel Corporation]

Datasheet
KEY:[ ] = Current mode
Spec. for more details)
[COMPATIBLE
Figure 7. Interrupt Generation Logic
FAILED NEG
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.
{ } = Interface extensibility request value (see IEEE1284
(register name[x]) : x = bit #, that is PCIER[1] = PCIER, bit 1
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)
MODE NOT
[COMPATIBLE
ENABLED
FAILED NEG
EXTCODE)
MODE]
(INVALID
MODE]
NSR=0x41
HOST HAS NOT RESPONDED
TERMINATION
[COMPATIBLE
NSR=0x82
[COMPATIBLE MODE]
MODE]
FOR OVER 1 SEC.)
HOST-TIMEOUT
NSR=0x22
NEG-OK
NSR=0x86[EPP
MODE]{40}
NSR=0x88[RN MODE]
{00} NSR=0x8A[RB
MODE]{01}
NSR=0x8C[ECP w/o
RLE]{10}
NSR=0x8E[ECP w/
RLE]{30}
IEEE 1284-Compatible Parallel Interface Controller — CD1284
NEG-OK
An immediate termination from the Host will
generate this interrupt
HANDSHAKING SEQUENCE
NSR=0x16 (EPP)
NSR=0x18 (RN)
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)
HOST HAS VIOLATED
[COMPATIBLE MODE]
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}
INVALID/ImedTerm
PCIER[1]
IDREQ
PCIER[5]
NEGCH
NEGCH
PCISR[5]
IDREQ
PCISR[1]
45