YMF724F
b2................DPLL1: Disable PLL1 Clock Oscillation
Setting this bit to “1” disables the oscillation of PLL for the PCI Audio function.
“0”: Normal
“1”: Disable
(default)
b3................PSL0: Power Save Legacy Audio Block 0
Setting this bit to “1” stops providing the clock with the Legacy Audio function block 0. This block
includes FM Synthesizer and SB Pro engines.
“0”: Normal
(default)
“1”: Power Save
b4................PSL1: Power Save Legacy Audio Block 1
Setting this bit to “1” stops providing the clock with the Legacy Audio function block 1. This block
includes MPU401 and Joystick.
“0”: Normal
(default)
“1”: Power Save
b5................PSN: Power Save PCI Audio block
Setting this bit to “1” stops providing the clock with the PCI Audio function block. This block includes
PCI Audio, SRC, AC3F2 I/F, AC’97 I/F, H/W Vol. and SPDIF.
“0”: Normal
(default)
“1”: Power Save
b8................PR0: AC’97 Power down Control 0
This bit controls the power state of the ADC and Input Mux in 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 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 AC‘97. This power state retains
the Reference Voltage of 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 AC’97. This power state removes
Reference Voltage of AC’97.
“0”: Normal
(default)
“1”: Power down
January 14, 1999
-22-
YAMAHA [ YAMAHA CORPORATION ]
