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364 SA-1110 Developer’s Manual
Peripheral Control Module
0h 8006 0018 MCP Status Register: MCSR Read/Write and Read-Only
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Reserved
TCE
ACE
CRC
CWC
TNE
TNF
ANE
ANF
TRO
TTU
ARO
ATU
TRS
TTS
ARS
ATS
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 ? ? ? ? 0 0 0 0
(Sheet 1 of 2)
Bits Name Description
0ATS
Audio transmit FIFO service request flag (read-only).
0 – Audio transmit FIFO is more than half-full (five or more entries filled) or MCP disabled.
1 – Audio transmit FIFO is half-full or less (four or fewer entries filled) and MCP operation is
enabled, DMA service request signalled, interrupt request signalled if not masked (if
ATE=1).
1ARS
Audio receive FIFO service request (read-only).
0 – Audio receive FIFO is less than half-full (three or fewer entries filled) or MCP disabled.
1 – Audio receive FIFO is half-full or more (four or more entries filled) and MCP operation is
enabled, DMA service request signalled, interrupt request signalled if not masked (if
ARE=1).
2TTS
Telecom transmit FIFO service request flag (read-only).
0 – Telecom transmit FIFO is more than half-full (five or more entries filled) or MCP
disabled.
1 – Telecom transmit FIFO is half-full or less (four or fewer entries filled) and MCP
operation is enabled, DMA service request signalled, interrupt request signalled if not
masked (if TTE=1).
3TRS
Telecom receive FIFO service request (read-only).
0 – Telecom receive FIFO is less than half full (three or fewer entries filled) or MCP
disabled.
1 – Telecom receive FIFO is half full or more (four or more entries filled) and MCP
operation is enabled, DMA service request signalled, interrupt request signalled if not
masked (if TRE=1).
4ATU
Audio transmit FIFO underrun.
0 – Audio transmit FIFO has not experienced an underrun.
1 – Audio transmit logic attempted to fetch data from transmit FIFO while it was empty
request interrupt.
5ARO
Audio receive FIFO overrun.
0 – Audio receive FIFO has not experienced an overrun.
1 – Audio receive logic attempted to place data into receive FIFO while it was full, request
interrupt.
6TTU
Telecom transmit FIFO underrun.
0 – Telecom transmit FIFO has not experienced an underrun.
1 – Telecom transmit logic attempted to fetch data from transmit FIFO while it was empty,
request interrupt.
7TRO
Telecom receive FIFO overrun.
0 – Telecom receive FIFO has not experienced an overrun.
1 – Telecom receive logic attempted to place data into receive FIFO while it was full,
request interrupt.
8ANF
Audio transmit FIFO not full (read-only).
0 – Audio transmit FIFO is full.
1– Audio transmit FIFO is not full.