YSS943 YAMAHA [YAMAHA CORPORATION], YSS943 Datasheet - Page 30

• Manufacturer Part Number: YSS943
• Description: ADAMB Advanced Digital Audio Multi channel decode processor
• Manufacturer: YAMAHA [YAMAHA CORPORATION]

(d) External memory interface
30
1) Read
When EM_CYC = c, EM_WEH = w, and EM_OEH = o, the timing is as described below.
No.
1
2
3
4
5
6
7
8
MEMA18-0
nMEMWE
MEMD7-0
nMEMCE
nMEMOE
Read cycle time
Address access time
nMEMOE access time
Data setup time
Data hold time
Address setup time
Address hold time
nMEMOE pulse width
Parameter
Symbol Condition
t
t
t
t
RCYC
t
t
t
t
EAC
DSR
DHR
ASR
AHR
REP
AA
6
CL = 20 pF
CL = 20 pF
CL = 20 pF
CL = 20 pF
CL = 20 pF
CL = 20 pF
2
3
8
1
Min.
25
0
4
Read
Data
YSS944/943/940
T
t
5
T
ASR+
CLK
7
CLK
T
Typ.
× (2^o+1)
CLK
t
× (2c+2)
REP+
× 1
t
AHR
T
T
CLK
CLK
× (2c+3)-25
× (2c+2)-25
Max.
Unit
ns
ns
ns
ns
ns
ns
ns
ns