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YMF744B
February 3, 1999
-23-
4A-4Bh: DS-1S Power Control 1
Read / Write
Default: 0000h
Access Bus Width: 8, 16, 32-bit
b15
b14
b13
b12
b11
b10
b9
b8
b7
b6
b5
b4
b3
b2
b1
b0
PR7
PR6
PR5
PR4
PR3
PR2
PR1
PR0
-
JSR
-
-
-
DPLL
-
DMC
b0................DMC: Disable Master Clock Oscillation
Setting this bit to “1” disables the oscillation of the Master Clock (24.576 MHz).
“0”: Normal
(default)
“1”: Disable
b2................DPLL: Disable PLL Clock Oscillation
Setting this bit to “1” disables the oscillation of PLL.
“0”: Normal
(default)
“1”: Disable
b6................JSR: Joystick Reset
This bit controls reset of the flip-flop circuit following the analog comparator stage on the joystick port.
The Initial value is set to “0” immediately after power on reset or hardware reset.
“0”: Normal
(default)
“1”: Resets the flip-flop circuit following the analog comparator stage on the joystick port
b8................PR0: AC’97 Power Down Control 0
This bit controls the power state of the ADC and Input Mux in the Primary AC’97.
“0”: Normal
(default)
“1”: Power down
b9................PR1: AC’97 Power Down Control 1
This bit controls the power state of the DAC in the Primary AC’97.
“0”: Normal
(default)
“1”: Power down
b10..............PR2: AC’97 Power Down Control 2
This bit controls the power state of the Analog Mixer (Vref still on) in the Primary AC’97. This power
state retains the Reference Voltage of the AC’97.
“0”: Normal
(default)
“1”: Power down
b11..............PR3: AC’97 Power Down Control 3
This bit controls the power state of the Analog Mixer (Vref off) in the Primary AC’97. This power
state removes Reference Voltage of the AC’97.
“0”: Normal
(default)
“1”: Power down