UPD7759C NEC [NEC], UPD7759C Datasheet - Page 14

• Manufacturer Part Number: UPD7759C
• Description: ADPCM SPEECH SYNTHESIZER LSIs
• Manufacturer: NEC [NEC]

14
2.3 STANDBY MODE
(1) TIMING REQUIREMENTS
(2) SWITCHING CHARACTERISTICS
TIMING CHART (Standby mode)
Standby escape signal
L*
Operation mode hold time
D/A converter activate
/inactivate time
BUSY set up time
Synthesis start time
BUSY output delay
Note L*: Signal to release standby mode.
Note
pulse width
=
I
AVO
CS ST : When operation mode is stand alone mode.
CS WR : When operation mode is slave mode
L*
BUSY
Parameters
Parameters
max
mid
0
t
STB
Symbol
Symbol
t
t
t
t
t
t
SSS
SBS
STB
AW
DA
SB
V
after synthesis
from L*
after D/A converter activation
In standby mode, oscillation
start time is included.
t
DA
DD
= 5 V
10 %
Conditions
Conditions
t
SB
t
AW
t
SBS
t
DA
MIN.
MIN.
350
t
SSS
TYP.
TYP.
46.5
6.25
2.9
2.1
4
Synthesis
MAX.
MAX.
2.2
47
10
80
3
Unit
Unit
ms
ms
ms
PD7759
ns
s
s