CXA1998 SONY [Sony Corporation], CXA1998 Datasheet - Page 19

• Manufacturer Part Number: CXA1998
• Description: Recording/Playback Equalizer Amplifier
• Manufacturer: SONY [Sony Corporation]

• XRESET (Pin 27) input level detection is done by comparison with V
• For resetting with CPU when power is turned ON
• Examples of AGC control during timer recording
• Make sure that V
The level should be V
(1) Resets when power is turned ON (AGC function operates).
(2) AGC is turned OFF after AGC inputs (Pins 5 and 32) rise.
(3) AGC is turned ON and timer recording begins.
applying CR time constant to XRESET (Pin 27) and turning power ON.
(External capacitor charge of AGC TC is discharged.)
XRESET
XRESET
(Pin 23)
(Pin 27)
(Pin 23)
(Pin 27)
V
V
DD
DD
DD
0V
DD
is 4.0V or more and XRESET is 1.5V or less, and 1µs or more when resetting by
4.0V or more
4.0V or more
1.5V or less
/2 > XRESET during the interval A.
1µs or more
1µs or more
A
– 19 –
DD
/2.
5.0V
CXA1998AQ