SM5902AF Nippon Precision Circuits Inc, SM5902AF Datasheet - Page 14

• Manufacturer Part Number: SM5902AF
• Description: compression and non compression type shock-proof memory controller
• Manufacturer: Nippon Precision Circuits Inc

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