YMF721 Datasheet, PDF (24/41 Pages) LSI Computer Systems – FM + Wavetable Synthesizer LSI

YMF721
AC Characteristics
1. CPU interface (Refer to Fig. 1, 2, 3)
Item
Symbol Min. Typ. Max. Unit
Address set up to /IOW, /IOR active
t_AS
30
Address hold to /IOW, /IOR inactive t_AH
10
/IOW Write Pulse Width
t_WW
50
Write Data set up to /IOW active
t_WDS
10
Write Data hold to /IOW inactive
t_WDH
10
/IOR Read Pulse Width
t_RW
80
Read Data access time
t_ACC
Read Data hold from /IOR inactive
t_RDH
10
ns
ns
ns
ns
ns
ns
60 ns
ns
Chip select setup time
t_CS
5
ns
Chip select hold time
t_CH
10
ns
RESET Pulse Width
t_RST
100
ms
Notes : V_SS=0[V], T_OP=0~70°C, V_DD=5.0±0.25[V]
2. Serial audio interface (Refer to Fig. 4.)
Item
Symbol Condition Min. Typ.
CLKO frequency
CLKO duty
f_CLKO16
D_CLKO16
- 16.9344
40
50
BCO frequency
BCO duty
Serial data setup time
Serial data hold tim
LRO setup time
LRO hold time
WCO setup time
WCO hold time
f_BCK
- 2.1168
D_BCLK
40
50
t_DS BCO - /DO3-0 -
118
t_DH BCO ¯ /DO3-0 -
118
t_LRS BCO - /LRO
-
118
t_LRH BCO ¯ /LRO
-
118
t_WCS BCO - /WCO
-
118
t_WCH BCO ¯ /WCO
-
118
Notes : V_SS=0[V], T_OP=0~70°C, V_DD=5.0±0.25[V]
Sampling frequency (fs) is 44.1 kHz. Duty factor is measured at 1/2 V_DD
Max.
-
60
-
60
-
-
-
-
-
-
Unit
MHz
%
MHz
%
ns
ns
ns
ns
ns
ns
3. Others
Item
Symbol
Condition
Master Clock Frequency
(X’tal 33) Duty
f₃₃
V_DD=5.0±0.25[V]
D_f33 V_DD=3.3±0.3[V]
Power Consumption
I_OP1
V_DD=5.25[V]
(during normal operation)
I_OP2
V_DD=3.60[V]
Power Consumption
I_OP3
V_DD=5.25[V]
(during power down mode)
I_OP4
V_DD=3.60[V]
Notes : V_SS=0[V], T_OP=0~70°C
/RESETSEL = "H". Duty factor is measured at 1/2 V_DD
Min. Typ. Max. Unit
33.8688
MHz
40
50
60 %
40
50 mA
25
30 mA
25
50 mA
15
30 mA
- 24 -
July 10, 1997