MITSUBISHI SOUND PROCESSOR ICs
S E R IE S
S E R IE S
50
M65849BFP
SINGLE CHIP SURROUND PROCESSOR
The Power On Reset
When the IC is supplied Vcc, the reset circuit is on and after about 120ms (Vcc=5V C 24 =47µF) the
reset circuit is off automatically.
The conditions are as follows.
D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 D14 D15
L
L
L
L
H
L
L
L
H
H
H
H
H
H
L
H
MICSW
DATA LOAD
9.2ms
I(L+R) NORMAL OFF
-¥
-¥
*1 The Reset Time
The reset time depends on the external C of 24 pin and the time can be calculated
as follows.
The Reset Time (mS)=2.5 x c (mS)
Ex.)
In The Case Of c=47µF
The Reset Time 2.5 x 47=117.5 (mS)
Clock oscillator circuit
This IC incorporates a current control type clock oscillator circuit in it, thus providing circuit
configuration just by connecting an Rc for current control pin 1 (MCLKCONT).
Fully internal clock supply prevents occurrence of undesired radiation without affecting any
external circuit.
The oscillator frequency fck is following.
fck=4MHz(Rc=22kW)
DC Current
Clock
oscillator
circuit
1
Rc
Clock frequency:fck
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