TMF8701 datasheet(20/66 Pages) OSRAM

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Datasheet, Public

Page 19

[v2-00] 2023-Feb-21

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TMF8701 − Register Description

Figure 24:

ENABLE Register

Figure 25:

INT_STATUS Register

0xe0: ENABLE

Field

Name

Reset

Type

Description

7cpu_reset

RW_SC

Write a '1' here to reset CPU. This generates global

reset, fully resetting CPU and all CPU registers. The bit

resets itself, no need to explicitly clear it.

cpu_ready

CPU is ready to handle I²C - if this bit is zero, then only

the registers 0xe0 and above are usable, the memory

mapped I²C space is not used.

Bit gets set only explicitly by software, therefore a

functional and running firmware is necessary for this

bit to work.

pon

R_PUSH

1 = Activate oscillator

0 = Ask cpu to go to standby

Activating the oscillator is implemented in hardware.

Whenever this register is '0' and a '1' is being written,

the oscillator is being started and CPU receives a

PON1 interrupt. It is implemented in the bootloader

to execute a reset at this point, but the application

goes to an IDLE state.

De-activating the oscillator is a software assisted

process. It is important that the CPU powers down all

modules properly before turning off the oscillator,

therefore this is implemented in firmware. So writing a

'0' to this register will trigger an internal CPU interrupt.

The firmware, after powering down everything, sets

the device into standby state.

0xe1: INT_STATUS

Field

Name

Reset

Type

Description

int2

R_PUSH1

Raw histogram available interrupt for App0; asserted

when a raw histogram can be retrieved from I²C.

int2 status. If bis is asserted, and int2_enab is asserted as

well, then the INT pin will be pulled low. Writing a '1' here

will clear int1 condition.

int1

R_PUSH1

Object detection interrupt for App0; asserted when a

result from object detection is available

int1 status. If bis is asserted, and int1_enab is asserted as

well, then the INT pin will be pulled low. Writing a '1' here

will clear int1 condition.

TMF8701 数据表(PDF) 20 Page - OSRAM GmbH

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