AFE4490 datasheet(53/69 Pages) TI

53 / 69 page

AFE4400

www.ti.com

SBAS601D – DECEMBER 2012 – REVISED MAY 2013

PRPCOUNT: Pulse Repetition Period Count Register (Address = 1Dh, Reset Value = 0000h)

D23

D22

D21

D20

D19

D18

D17

D16

D15

D14

D13

D12

PRPCOUNT[15:0]

D11

D10

PRPCOUNT[15:0]

This register sets the device pulse repetition period count.

Bits D[23:16]

Must be '0'

Bits D[15:0]

PRPCOUNT[15:0]: Pulse repetition period count

The contents of this register can be used to set the pulse repetition period (in number of

clock cycles of the 4-MHz clock).

CONTROL1: Control Register 1 (Address = 1Eh, Reset Value = 0000h)

D23

D22

D21

D20

D19

D18

D17

D16

D15

D14

D13

D12

D11

D10

CLKALMPIN[2:0]

TIMEREN

This register configures the clock alarm pin and timer.

Bits D[23:12]

Must be '0'

Bits D[11:9]

CLKALMPIN[2:0]: Clocks on ALM pins

Internal clocks can be brought to the PD_ALM and LED_ALM pins for monitoring.

Note that the CLKALMPIN[2:0] register bits must be set before using this register bit.

Table 5 defines the settings for the two alarm pins.

Bit D8

TIMEREN: Timer enable

0 = Timer module is disabled and all internal clocks are off (default after reset)

1 = Timer module is enabled

Bits D[7:2]

Must be '0'

Bit D1

Must be '1'

Bit D0

Must be '0'

Table 5. PD_ALM and LED_ALM Pin Settings

CLKALMPIN[2:0]

PD_ALM PIN SIGNAL

LED_ALM PIN SIGNAL

000

Sample LED2

Sample LED1

001

LED2 pulse

LED1 pulse

010

Sample LED2

Sample LED1 pulse

011

LED2 convert

LED1 convert

100

LED2 ambient

LED1 ambient

101

No output

110

No output

111

No output

Submit Documentation Feedback

Product Folder Links: AFE4400

AFE4490 데이터시트(PDF) 53 Page - Texas Instruments

AFE4490 데이터시트(HTML) 53 Page - Texas Instruments

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

데이터시트 다운로드

링크 URL