SM5902AF Datasheet, PDF (14/40 Pages) Nippon Precision Circuits Inc – compression and non compression type shock-proof memory controller

ATT, MUTE settings 83
Bit Name
D7 ATT
D6 MUTE
D5 SOFT
D4
NS
D3 CMP12
D2
D1
D0
SM5902AF
Function
Attenuator enable
Forced muting (changes instantaneously)
Soft muting (changes smoothly when ON only)
Includes noise shaper function when encoding
12-bit comparison connect/ 16-bit comparison connect
83hex = 1000 0011
H operation Reset level
Attenuator ON
L
Mute ON
L
Soft mute
L
NS ON
L
12-bit comparison
L
Refer to "Attenuation", "Soft mute", "Force mute", "12-bit comparison connection".
Attenuation level settings 84
Bit Name
D7
K7
D6
K6
D5
K5
D4
K4
D3
K3
D2
K2
D1
K1
D0
K0
Function
MSB 2^-1
2^-2
2^-3
2^-4
2^-5
2^-6
2^-7
LSB 2^-8
84hex = 1000 0100
H operation Reset level
L
H
L
L
L
L
L
L
Refer to "Attenuation", "Soft mute", "Force mute".
Option settings 85
Bit Name
D7 RAMS1
D6 RAMS2
D5 YFLGS
D4 YFCKP
D3 COMPFB
D2 COMP6B
D1 COMP5B
D0 COMP4B
85hex = 1000 0101
Function
DRAM type setting
RAMS1=0 RAMS2=0 when 1MDRAM(256k × 4bit) × single
RAMS1=1 RAMS2=0 when 4MDRAM(1M × 4bit) × single
RAMS1=0 RAMS2=1 when 4MDRAM(1M × 4bit) × double
RAMS1=1 RAMS2=1 when 16MDRAM(4M × 4bit) × single
FLAG6 set conditions (reset using status read command 90H)
- 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
Full-bit compression mode
6-bit compression mode
5-bit compression mode
4-bit compression mode
H operation Reset level
L
L
L
L
L
H
L
L
When the number of compression bits is set incorrectly (2 or more bits in D0 to D3 are set to 1 or all bits are set to 0),
6-bit compression mode is selected.
NIPPON PRECISION CIRCUITS-14