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MICRF620Z 데이터시트(PDF) 18 Page - Micrel Semiconductor

부품명 MICRF620Z
상세설명  434MHz ISM Band Transceiver Module
PDF  21 Pages
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제조업체  MICREL [Micrel Semiconductor]
홈페이지  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

MICRF620Z 데이터시트(HTML) 18 Page - Micrel Semiconductor

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Micrel, Inc.
MICRF620/MICRF620Z
July 2006
18
M9999-120205
If FEE = -128 and still counting dwn-pulses:
1) =>-129 = +127
2) 126
3) 125
To avoid this situation, always make sure max count is
between limits.
Application Circuit Illustration
Figure 11. Circuit illustration of MICRF620, LDO and MCU
Figure 12 shows a typical set-up with the MICRF620, a
Low-Drop-Out voltage regulator (LDO)
and a mikro-
controller (MCU). When the MICRF620 and the MCU runs
on the same power supply (min 2.0, max. 2.5V), the IO
can be connected directly to the MCU. If the MCU needs a
higher VDD than the max. specified VDD of the MICRF620
(2.5V), voltage dividers need to be added on the IO lines
not to override the max. input voltage.
Figure 11 shows a recommended voltage divider circuit for
a MCU running at 3.0V and the MICRF620 at 2.5V.
3k3
18k
3k3
18k
3k3
18k
15k
MICRF6xx
MCU
CS
SCLK
IO
DATAIXO
DATACLK
LD
RSSI
CS
SCLK
IO
DATAIXO
DATACLK
LD
RSSI
Figure 12. How to connect MICRF620 (2.5V) and MCU (3.0V)



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