SPC7283 Epson Electronics America, Inc., SPC7283 Datasheet - Page 50

• Manufacturer Part Number: SPC7283
• Description: IEEE1394 Controller
• Manufacturer: Epson Electronics America, Inc.

S1R72803F00A
LINK Core Interrupt Status Register 0
Bit7 Unknown Expected Channel
Bit6 DuplicateChannelDetected
Bit5 ISO Arbitration Failed
Bit4 ISO Arbitration Failed
Bit3 Cycle Timer Over Flow
Bit2 Local Cycle Event Occurred
Bit1 Cycle Start Packet Lost
Bit0 CycleStartPkt Arbitration Failed
46
Address Register Name
0x05
The value of each bit of this register indicates the status of a corresponding interrupt source. If these bits become
“1” when the associated bit of the LINKIntEnb0 Register is “1”, this register asserts the interrupt signal to the
CPU.
The CPU reads this register after receiving the interrupt signal to locate an interrupt source. By writing the read
value again, it clears these bits.
When a packet of ISO channel not set in the CHANNEL_AVAILABLE Register is detected, this bit becomes
“1”.
It is enabled when the WonIRM = “1” of IRM IDStat Register (the self node is IRM).
When a packet of a same channel is detected in the ISO period of 1 cycle, this bit becomes “1”.
It is enabled when the WonIRM = “1” of IRM IDStat Register (the self node is IRM).
When an ISO packet transmit request is received but a SubAction Gap is detected before it is transmitted, this
bit becomes “1”.
When a Cycle_START packet is received but a SubAction Gap cannot be detected even after the
ISOCHRONOUS_CYCLE_TIME has passed, this bit becomes “1”.
When the CYCLE_TIMER overflows, this bit becomes “1”.
When an local cycle event occurs, this bit becomes “1”.
When the CYCLE_START_PACKET does not exist over two local cycle events, this bit becomes “1”.
When a CYCLE_START_PACKET cannot be transmitted before the SubActionGap after a local cycle event
occurs, this bit becomes “1”. This bit is enabled when cmstr = “1”.
LinkIntStat0
7: UnExpCh
6: DupliCh
5: IsoArbFaild
4: CycTooLong
3: CycOverFlw
2: CycEvent
1: CycLost
0: CycArbFail
Bit Symbol
R(W) 0: None
R(W) 0: None
R(W) 0: None
R(W) 0: None
R(W) 0: None
R(W) 0: None
R(W) 0: None
R(W) 0: None
R/W
EPSON
1: Unknown Expected Channel
1: DuplicateChannelDetected
1: Iso Arbtration Failed
1: ISO Arbitration Failed
1: Cycle Timer Over Fullow
1: Cycle Start Packet Lost
1: CycleStartPkt Arbtration Fail
1: Local Cycle Event Occured
Description
H.Rst S.Rst B.Rst
0x00 0x00
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