SM5903CF Datasheet, PDF (16/31 Pages) Nippon Precision Circuits Inc – compression and non compression type anti-shock memory controller

SM5903CF
Status flag operation summary
Flag
name
FLAG6
Read
method
READ
90H
bit 7
Meaning
Set
Reset
MSOVF
READ
90H
bit 6
Meaning
Set
Reset
BOVF
READ
90H
bit 5
Meaning
Set
Reset
DCOMP
READ
90H
bit 3
Meaning
Set
Reset
MSWIH
READ
90H
bit 2
Meaning
Set
Reset
MSRIH
READ
90H
bit 1
Meaning
Set
Reset
- Indicates to the CD signal processor DSP (used for error correction, de-interleaving) that a
disturbance has exceeded the RAM jitter margin.
- Set according to the YFLAG input and the operating state of YFCKP and YFLGS.
FLAG6 set conditions
When YFLGS=0, YFCKP=0, YFCLK input falling edge, YFLAG=L
When YFLGS=0, YFCKP=1, YFCLK input rising edge, YFLAG=L
When YFLGS=1, YFCKP=0, YFLAG=L
When YFLGS=1, YFCKP=1, YFLAG=H
- By 90H status read
- By 80H command when MSON=ON
- After external reset
- Indicates once only that a write to external DRAM has caused an overflow. (When reset
by the 90H status read command, this flag is reset even if the overflow condition continues.)
- When the write address (WA) exceeds the read address (RA)
- By 90H status read
- When a read address clear (MSRACL) or write address clear (MSWACL) command is issued
- After external reset
- Indicates that a input data was spilled
(When input buffer memory overflow because sampling rate of input data is too fast.)
- When inputs a data during a buffer memory overflow
- By 90H status read
- When a read address clear (MSRACL) or write address clear (MSWACL) command is issued
- After external reset
- Indicates that a compare-connect sequence is operating
- When a (3-pair or 2-pair) compare-connect start command is received (MSDCN2=1)
- When a direct connect command is received (MSDCN2=0, MSDCN1=1)
- When a (3-pair or 2-pair) comparison detects conforming data
- When the connect has been performed after receiving a direct connect command
- When a compare-connect stop command (MSDCN2=0, MSDCN1=0) is received
- When a MSWREN=1 command is received (However, if a compare-connect command is
received at the same time, the compare-connect command has priority.)
- After external reset
- Indicates that the encode sequence has stopped due to internal factors
(not microcontroller commands)
- When FLAG6 (above) is set
- When BOVF (above) is set
- When MSOVF (above) is set
- When conforming data is detected after receiving a compare-connect start command
- When the connect has been performed after receiving a direct connect command
- When a read address clear (MSRACL) or write address clear (MSWACL) command is received
- After external reset
- Indicates that the decode sequence has stopped due to internal factors
(not microcontroller commands)
- When the valid data residual becomes 0
- By 90H status read
- When a read address clear (MSRACL) or write address clear (MSWACL) command is issued
- After external reset
NIPPON PRECISION CIRCUITS-16