SAA7385GP Philips Semiconductors, SAA7385GP Datasheet - Page 40

• Manufacturer Part Number: SAA7385GP
• Description: Error correction and host interface IC for CD-ROM SEQUOIA
• Manufacturer: Philips Semiconductors

Philips Semiconductors
Table 61 STAT field description
Table 62 Interrupt register and time-out register: 0xF0AD - 53CF94 address 0x05; note 1
Note
1. This register is used in conjunction with STAT and SEQSTP to determine the cause of an interrupt.
Table 63 INT field description
Table 64 Sequence step register and synchronous transfer register: 0xF0AE - 53CF94 address 0x06; note 1
Note
1. The register fields are described in Table 65.
1996 Jun 19
MSG, C/D, I/O
VGC
TC
PE
GE
INT
ID2 to ID0
SEL
SATN
RESEL
FC
BS
DIS
ILCMD
SRST
TIMEOUT7 to
TIMEOUT0
MNEMONIC
MNEMONIC
Error correction and host interface IC for
CD-ROM (SEQUOIA)
SEQSTP
SEQSTP
FIELD
FIELD
INT
INT
These indicate the phase on the SCSI bus.
Valid Group Code; set if the group code matches code defined in ANSI X3.131-1986.
Terminate Count; set when transfer count decrements to zero.
Parity Error; set if parity checking is enabled and a SCSI parity error occurs.
Gross Error; set on various error conditions. These errors do not cause interrupts.
Interrupt. Indicates whether device is trying to interrupt the microcontroller.
Specifies the encode destination for selection or re-selection.
Selected; set during selection phase if selected as a target with ATN negated.
Selected with ATN; set during selection if selected as a target with ATN asserted.
Reselected; set during reselection phase if reselected as an initiator.
Function complete; set after any target mode command has been completed.
Bus service. Indicates that another device is requesting service; in target mode it is asserted
whenever the initiator asserts ATN.
Disconnect. In target mode this is asserted and as a Terminate Sequence or a Command Complete
Sequence command causes disconnection.
Illegal command; set when a reserved code is placed in CMD or when the command is from a mode
group.
SCSI reset detect. This may be set if a reset on the SCSI bus is detected.
Time-out period for response to selection or re-selection.
R/W
R/W
W
W
R
R
SRST
7
7
ILCMD
6
6
DIS
5
5
40
TIMEOUT7 to TIMEOUT0
DESCRIPTION
DESCRIPTION
BS
4
4
DATA BYTE
DATA BYTE
TRANSPERIOD4 to TRANSPERIOD0
SOM
FC
3
3
RESEL
SS2
2
2
Preliminary specification
SATN
SS1
1
1
SAA7385
SEL
SS0
0
0