Functional Description. AMS Mira130

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8 Functional Description

Mira130

Functional Description

8.1 Chip Description

8.1.1 Power-On Sequence

With an external supply of 1.2 V to DVDD, the following power-on sequence is required:

Figure 17:

Power-Up Sequence

T1 cut off power

DOVDD

DVDD

AVDD

XSHUTDN

I

2

C

T2

T3

T4

I

2

C activity is ready

8.1.2

(1) T1 > 0 ms, T2 > 1 ms, T3 > 2 ms, T4 > 2 ms

I/O Pins Power-On Status

Figure 18:

Pins Power-On Status

Pin Name

Built-In

Pull-Up/Pull-Down

TRIGS

FSYNC

No

No

LED STROBE

No

GPIO

No

Power Stable and

XSHUTDOWN Low

High-Z

High-Z

High-Z

High-Z

XSHUTDOWN High

Low

Low

Low

Low

Datasheet

• PUBLIC

DS000715

• v2-01 • 2020-Jul-07

48

│ 24

8.1.3

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Mira130

Functional Description

Sleep Mode

Under sleep mode, this chip stops output data, works in a low power status, and keeps registers unchanged. This chip enters sleep mode by writing 0 to register 16'h0100[0]. I

2

C access remains active:

Figure 19:

Sleep Mode Control Register

Function

Sleep mode

Address Default Value

16’h0100 1’b1

Description

Bit[0]: Manual sleep mode control

0: Sleep mode enable

1: Sleep mode disable

8.1.4 Reset Mode

During reset, this chip stops outputting data, stays in sleep mode by the software approach, and resets its registers to their default values. This chip offers two approaches to reset:

1.

Hard reset: Pull the XSHUTDN pin low, I

2

C read and write are not supported.

2.

Soft reset: Write 1 to register 16'h0103[0], reset mode lasts for 150 ns

Figure 20:

Soft Reset Control Register

Function

Soft reset

Address Default Value

16’h0103 1’b0

Description

Bit[0]: Soft reset

Datasheet

• PUBLIC

DS000715

• v2-01 • 2020-Jul-07

48

│ 25