ASM330LHB datasheet(111/131 Pages) STMICROELECTRONICS

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Embedded advanced features

The following table provides a list of the registers for the embedded advanced features page 1. These registers

are accessible when PAGE_SEL[3:0] are set to 0001 in PAGE_SEL (02h).

Table 247. Register address map - embedded advanced features page 1

Name

Type

Default

Comment

Hex

Binary

FSM_LC_TIMEOUT_L

R/W

01111010

00000000

FSM_LC_TIMEOUT_H

R/W

01111011

00000000

FSM_PROGRAMS

R/W

01111100

00000000

FSM_START_ADD_L

R/W

01111110

00000000

FSM_START_ADD_H

R/W

01111111

00000000

Reserved registers must not be changed. Writing to those registers may cause permanent damage to the device.

The content of the registers that are loaded at boot should not be changed. They contain the factory calibration

values. Their content is automatically restored when the device is powered up.

Write procedure example:

Example: write value 01h in register at address 7Ch (FSM_PROGRAMS) in page 1

1. Write bit FUNC_CFG_EN = 1

in FUNC_CFG_ACCESS (01h)

// Enable access to embedded functions registers

2. Write bit PAGE_WRITE = 1

in PAGE_RW (17h) register

// Select write operation mode

3. Write 0001 in PAGE_SEL[3:0] field

of register PAGE_SEL (02h)

// Select page 1

4. Write 7Ch in PAGE_ADDR register (08h)

// Set address

5. Write 01h in PAGE_DATA register (09h)

// Set value to be written

6. Write bit PAGE_WRITE = 0

in PAGE_RW (17h) register

// Write operation disabled

7. Write bit FUNC_CFG_EN = 0

in FUNC_CFG_ACCESS (01h)

// Disable access to embedded functions registers

Read procedure example:

Example: read value of register at address 7Ch (FSM_PROGRAMS) in page 1

1. Write bit FUNC_CFG_EN = 1

in FUNC_CFG_ACCESS (01h)

// Enable access to embedded functions registers

2. Write bit PAGE_READ = 1

in PAGE_RW (17h) register

// Select read operation mode

3. Write 0001 in PAGE_SEL[3:0] field

of register PAGE_SEL (02h)

// Select page 1

4. Write 7Ch in PAGE_ADDR register (08h)

// Set address

5. Read value of PAGE_DATA register (09h)

// Get register value

6. Write bit PAGE_READ = 0

in PAGE_RW (17h) register

// Read operation disabled

7. Write bit FUNC_CFG_EN = 0

in FUNC_CFG_ACCESS (01h)

// Disable access to embedded functions registers

ASM330LHB

Embedded advanced features

DS13773 - Rev 7

page 111/131

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