MICRF219 データシートの表示（PDF） - Micrel

部品番号

コンポーネント説明

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MICRF219

300MHz to 450MHz ASK Receiver with RSSI, Auto-Poll, Bit-Check and Squelch

Micrel 

Micrel

RO2

C

RO1

C

V BIAS

R

Figure 2. Reference Oscillator Circuit

MICRF219

DOUT

CLK

Edge

Detector

CLK

Data Edge Pulses

Window

Counter

CLK 8 Stage

Shift Register

D

SQUELCH Decode

<=4

Good

>=7

Good

SQ

SQUELCH

Disables DO

R

Window

Decode

CLK

Auto Poll

Decode

Bad Bits

Decode Good

Bit Count

Good

Bit

QA1 Bad Bit

Returns to

SLEEP

WATCHDOG

Timer

Serial Control Register

D7 D8

Select 0, 2, 4, 8 Good

Bits Before Wakeup

SR

D15

WAKEUP

Timer (300µs)

D15 = 0 for Normal Operation

D15 = 1 for Auto Polled Operation

Figure 3. Autopoll, Bit-Check Block Diagram

June 2011

9

M9999-060811

(408) 944-0800

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