TMF8801 datasheet(23/73 Pages) OSRAM

23 / 73 page

Document Feedback

TMF8801

Datasheet

• PUBLIC

DS000648

• v10-00 • 2022-Dec-20

│ 22

8.4

ENABLE Register (Address 0xE0)

Figure 24:

ENABLE Register

Addr: 0xE0

ENABLE

Field

Name

Rst

Type

Description

cpu_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.

8.5

INT_STATUS Register (Address 0xE1)

Figure 25:

INT_STATUS Register

Addr: 0xE1

INT_STATUS

Field

Name

Rst

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.

TMF8801 数据表(PDF) 23 Page - OSRAM GmbH

TMF8801 数据表(HTML) 23 Page - OSRAM GmbH

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

数据表下载