njw1148a New Japan Radio Co.,Ltd, njw1148a Datasheet - Page 6

• Manufacturer Part Number: njw1148a
• Description: Njw1148a Audio Processor With Sound Enhancement And Trusurround Virtualizer
• Manufacturer: New Japan Radio Co.,Ltd

NJW1148A
!CHARACTERISTICS OF BUS LINES (SDA,SCL) FOR I
NOTE). Data hold time : t
providing a hold time of at least 300nsec for the SDA in the master device.
voltage (Vf) as much as possible.
– 6 –
The SDA block in the NJW1148A does not hold data. Add external data-delay-circuit of the SDA terminal, in case of not
The time-consists of the data-delay-circuit of the SDA terminal are as follows.
In addition, Schottky barrier diode (SBD) influences a Low level at the Acknowledge. Therefore choose the low forward
Please hold the Data Hold Time (t
(a) Low level ! High level :
(b) High level ! Low level :
SCL clock frequency
Hold time (repeated) START condition.
Low period of the SCL clock
High period of the SCL clock
Set-up time for a repeated START condition
Data hold time
Data set-up time
Rise time of both SDA and SCL signals
Fall time of both SDA and SCL signals
Set-up time for STOP condition
Bus free time between a STOP and START condition
Capacitive load for each bus line
Noise margin at the Low level
Noise margin at the High level
NOTE)
PARAMETER
MASTER
HD:DAT
V
DD
R
P
HD:DAT
) to 300ns or more to avoid status of unstable at SCL falling edge.
R
P
SBD
R
D
T
T
SYMBOL
LH
HL
t
t
t
t
t
≈ R
≈ R
HD:STA
HD:DAT
SU:DAT
SU:STO
SU:STA
t
t
t
V
f
HIGH
V
LOW
C
SCL
BUF
C
t
t
nH
nL
r
f
b
D
P
D
*C
*C
D
D
2
SCL
SDA
C-BUS DEVICES
MIN.
250
4.0
4.7
4.0
4.7
4.0
4.7
0.5
0
1
-
-
-
-
Standard mode
NJW1148A
TYP.
-
-
-
-
-
-
-
-
-
-
-
-
-
-
MAX.
1000
100
300
400
C
-
-
-
-
-
-
-
-
-
-
b
; total capacitance of one bus line in pF.
MIN.
100
0.6
1.3
0.6
0.6
0.6
1.3
0.5
0
1
-
-
-
-
Fast mode
TYP.
-
-
-
-
-
-
-
-
-
-
-
-
-
-
MAX.
400
300
300
400
-
-
-
-
-
-
-
-
-
-
UNIT
kHz
pF
µs
µs
µs
µs
µs
ns
ns
ns
µs
µs
V
V