NIPPON PRECISION CIRCUITS-17

SM5906AF

Flag

Read

name

method

FLAG6

READ

Meaning

– Indicates to the CD signal processor DSP (used for error correction, de-interleaving) that a

90H

disturbance has exceeded the RAM jitter margin.

bit 7

Set

– Set according to the YFLAG input and the operating state of YFLGS.

– FLAG6 set conditions

When YFLGS=0, YFLAG=LOW

When YFLGS=1, YFLAG=HIGH

Reset

– By 90H status read

– By 80H command when MSON=ON

– After external reset

– When MSWACL, MSRACL are issued

MSOVF

READ

Meaning

– Indicates once only that a write to external DRAM has caused an overflow. (When reset

90H

by the 90H status read command, this flag is reset even if the overflow condition continues.)

bit 6

Set

– When the write address (WA) exceeds the read address (RA)

Reset

– By 90H status read

– After external reset

– When MSWACL, MSRACL are issued

BOVF

READ

Meaning

– Indicates input data rate was too fast causing buffer overflow and loss of data

90H

Set

– When data is input while the previous data is still being processed.

bit 5

Reset

– By 90H status read

– After external reset

– When MSWACL, MSRACL are issued

SYNCER

READ

Meaning

– Indicates residual is not updated because sync data not verified for

≥ 2 blocks

90H

Set

– When sync data is not verified for

≥ 2 blocks (C2PO error etc.)

bit 4

Reset

– When sync data is verified

– After external reset

– When MSWACL, MSRACL are issued

DCOMP

READ

Meaning

– Indicates that a compare-connect sequence is operating

90H

Set

– When a (3-pair or 2-pair) compare-connect start command is received (MSDCN2=1)

bit 3

– When a direct connect command is received (MSDCN2=0, MSDCN1=1)

Reset

– 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, WREN has priority.)

– After external reset

MSWIH

READ

Meaning

– Indicates that the write sequence has stopped due to internal factors

90H

(not microcontroller commands)

bit 2

Set

– When FLAG6 (above) is set

– When BOVF (above) is set

– When MSOVF (above) is set

Reset

– 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

Status flag operation summary