ak7712a-vt AKM Semiconductor, Inc., ak7712a-vt Datasheet - Page 19

• Manufacturer Part Number: ak7712a-vt
• Description: Built-in 20-bit Adc/dac Sophisticated Audio Dsp
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
7) Refresh Interface Timing of DRAM(External RAM) (CAS before RAS Refresh)
0180-E-02
6) Read/write Interface Timing of Pseudo SRAM(External RAM)
8) Read/Write Interface Timing of DRAM(External RAM) (Page Mode)
(AVDD,DVDD,AVB,DVB=5.0V±5%, Ta=25 C, CL=20pF)
(AVDD,DVDD,AVB,DVB=5.0V±5%, Ta=25 C, CL=20pF)
(AVDD,DVDD,AVB,DVB=5.0V±5%, Ta=25 C, CL=20pF)
Write hold time after CASRF
Write pulse width
Read cycle
Pulse width of RASCE"H"
Pulse width of RASCE"L"
RASCE Pre-charge CASRF hold time
CASRF setup time at auto refresh
CASRF hold time at auto refresh
Address delay time fromOE " " (write)
Address delay time fromOE " " (read)
RASCE preceded address setup time
RASCE followed address hold time
CASRF preceded address setup time
CASRF followed address hold time
CASRF hold time after write
Data setup time
Data hold time after write
Pulse width of CASRF"H"
Pulse width of CASRF"L"
Address delay time from OE " " (writing)
Address delay time from OE " " (reading)
Hold time of column address
Address setup time
Pulse width of chip enable
Pre-charge time of chip enable
Chip enable time
Pulse width of write command
Data set time
Data hold time
Parameter
Parameter
Parameter
t
t
t
t
t
t
t
t
t
t
t
t
t
Symbol
AOEW
AOER
SURA
HRA
SUCA
HCLCA
HWCH
HCLW
W
SUD
HWLD
WCH
WCL
Symbol
Symbol
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
AOEW
AOER
CAH
AS
CE
P
CW
WP
DW
DH
CRD
WRH
WRL
RPC
SUR
HRRC
- 19 -
-15
-15
min
min
min
240
105
105
200
110
100
80
10
10
90
40
90
35
10
10
12
10
45
40
55
40
60
22
54
18.432
18.432
18.432
0
(normal mode)
max
max
max
15
70
15
70
-18
-18
min
min
min
260
120
120
220
XTI(MHz)
120
100
100
110
XTI(MHz)
XTI(MHz)
90
12
12
50
40
12
12
14
12
45
43
65
43
70
24
62
16.934
16.934
16.934
0
max
max
max
18
80
18
80
-20
-20
min
min
min
360
170
170
130
320
170
135
135
160
100
15
15
60
60
15
15
18
15
60
60
90
60
32
90
12.288
12.288
12.288
0
[AK7712A-VT]
max
max
max
110
110
20
20
1997/12
Units
Units
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns