参数资料
型号: 4021-DKDB2
厂商: Silicon Laboratories Inc
文件页数: 18/34页
文件大小: 783K
描述: KIT DEV TEST EZRADIO SI4021 TX
标准包装: 1
附件类型: 测试卡,发射器,915MHz
适用于相关产品: EZRadio?
Si4021
 
 
18
Simultaneously Pressed Push-Button Detect by Microcontroller
Vdd
Microcontroller mode
SPI
nIRQ
POR
(internal)
Push button
input 2
Push button
input 1
POR
PB1
PB1
PB2
PB1
PB2
PB1
Status rd
Status rd
Status rd
Status rd
Status rd
Status rd
Status rd
PB_nIRQdly*
Note:
*PB_nIRQdly is equal with the
debounce time
 
Simplified Block Diagram of Push-Button 14 Inputs
To Digital glitch filter for
Push-button4
Push-button1,2,3
D
Q
CLR
EVENT FLAG
SLEEP Command *
STAT. REG. READ Command **
COUNT/SINGLE
VDD
Note:
* In EEprom mode
** In uC controlled mode
Push-button1
Push-button2
Push-button4
Internal
blocker signal
to
 Push-button1
and
 Push-button2
p4
WEAK PULL-UP
 ENABLE/DISABLE
VDD
With internal weak pull-up
POR, LBD, WAKE UP TIMER,
 P. BUTTONS EVENT FLAGS
Notice:
Only one EVENT is
serviced simultaneously
the others are pending.
Digital glitch
filter
CLK
CLR for P.B1,2
b1, b2, b3
bc
 
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