ES9218PC datasheet(63/101 Pages) ESS

63 / 101 page

ES9218P Datasheet

CONFIDENTIAL ADVANCE INFORMATION 1.8

December 6, 2018

ESS TECHNOLOGY, INC. 237 South Hillview Drive, Milpitas, CA 95035, USA Tel (408) 643-8800 • Fax (408) 643-8801

Bits

[7:6]

[5:3]

[2]

[1:0]

Mnemonic

invert_gpio

reserved

auto_clk_gear

max_clk_gear

Default

2’b00

3’b000

1’b0

2’b00

Bit

Mnemonic

Description

[7:6]

invert_gpio

Allows each GPIO output to be inverted independently.

•

2’b00: normal GPIO operation (default)

•

2’b01: invert GPIO1 output only

•

2’b10: invert GPIO2 output only

•

2’b11: invert both GPIO outputs

[5:3]

reserved

[2]

auto_clk_gear

Decrease/increase the system clock by automatically adjusting the clock gear setting when the

clocking requirements reach a programmable threshold. This saves power when running at lower

sample rates.

•

1’b0: automatic clock gearing is disabled (default)

•

1’b1: automatic clock gearing is enabled

See Register 49-51: Automatic Clock Gearing Thresholds (0x31 – 0x33) for threshold setting.

[1:0]

max_clk_gear

Sets the maximum allowed divisor (/1, /2, /4, /8) of the system clock that the automatic clock gearing

circuitry can implement. This is useful when running at slow clock rates where a clock gear could slow

the CLK down below the I2C programming constraints.

•

2’b00: sets MCLK/1 as the maximum clock gearing ratio (effectively disabling the automatic

clock gearing) (default)

•

2’b01: sets MCLK/2 as the maximum clock gearing ratio

•

2’b10: sets MCLK/4 as the maximum clock gearing ratio

•

2’b11: sets MCLK/8 as the maximum clock gearing ratio

See Serial Control Interface for I2C clock requirements.

ES9218PC 数据表(PDF) 63 Page - ESS Technology,Inc

ES9218PC 数据表(HTML) 63 Page - ESS Technology,Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

数据表下载