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ES9218PC 数据表(PDF) 75 Page - ESS Technology,Inc |
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ES9218PC 数据表(HTML) 75 Page - ESS Technology,Inc |
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75 / 101 page  ES9218P Datasheet CONFIDENTIAL ADVANCE INFORMATION 1.8 December 6, 2018 75 ESS TECHNOLOGY, INC. 237 South Hillview Drive, Milpitas, CA 95035, USA Tel (408) 643-8800 • Fax (408) 643-8801 Register 47: Analog Control Override (0x2F) Bits [7] [6] [5] [4] [3] [2] [1] [0] Mnemonic enfcb encp_oe enaux_oe cpl_ens cpl_enw sel3v3_ps ensm_ps sel3v3_cph Default 1’b0 1’b0 1’b0 1’b0 1’b0 1’b0 1’b0 1’b0 Bit Mnemonic Description [7] enfcb Enables the fast charge of the analog reference. • 1’b0: analog reference will be charged as quickly as possible (default) • 1’b1: analog reference will be charged at a slower rate [6] encp_oe Allows the digital core to override the charge pump settings. • 1’b0: charge pump settings are controlled via the GPIO2 pin (default) • 1’b1: charge pump settings are controlled via the digital override bits [5] enaux_oe Allows the digital core to override the output switch settings. • 1’b0: output switch is controlled via the GPIO2 pin (default) • 1’b1: output switch is controlled via the enaux register [4] cpl_ens Enables the small charge pump and places it into strong mode. The small charge pump powers the pre-amplifier of the headphone amp. • 1’b0: small charge pump (strong mode) is disabled (default) • 1’b1: small charge pump (strong mode) is enabled • Note: encp_oe must be set to 1’b1 for the digital core to control the charge pump. [3] cpl_enw Enables the small charge pump and places it into weak mode. The small charge pump powers the pre-amplifier of the headphone amp. • 1’b0: small charge pump (weak mode) is disabled (default) • 1’b1: small charge pump (weak mode) is enabled • Note: encp_oe must be set to 1’b1 for the digital core to control the charge pump. [2] sel3v3_ps Configures the voltage of the positive power supply of the output stage. • 1’b0: uses 1.8V for the positive power supply of the output stage (default) • 1’b1: uses 3.3V for the positive power supply of the output stage [1] ensm_ps Allows for a smooth transition between 1.8V and 3.3V on the positive power supply. This bit should be configured to 1’b0 immediately before changing the sel3v3_ps bit. Once sel3v3_ps has been set to the required value, then ensm_ps can be set back to 1’b1 for normal operation. • 1’b0: configure the positive supply for a transition between 1.8V and 3.3V (default) • 1’b1: normal operation [0] sel3v3_cph Configures the voltage of the negative power supply of the output stage. • 1’b0: uses 1.8V for the negative power supply of the output stage (default) • 1’b1: uses 3.3V for the negative power supply of the output stage |
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