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Table 16. Static characteristics (LPC1100, LPC1100L series) continued T amb = 40 C to +85 C, unless otherwise specified. Symbol Parameter Conditions Min Typ [1] Max Unit Standard port pins, RESET I IL LOW-level input current V I = 0 V; on-chip pull-up resistor disabled I IH I OZ HIGH-level input current OFF-state output current V I = V DD ; on-chip pull-down resistor disabled V O =0V; V O = V DD ; on-chip pull-up/down resistors disabled V I input voltage pin configured to provide a digital function [12][13] [14] - 0.5 10 na - 0.5 10 na - 0.5 10 na 0-5.0 V V O output voltage output active 0 - V DD V V IH HIGH-level input voltage 0.7V DD - - V V IL LOW-level input voltage - - 0.3V DD V 3.3 0.7 2.3V HIGH 3.3 0.3 0.99V LOW 6
LPC111X (input leakage current) 2uA 3.3 (2 10^-6) 1.7(MΩ) 7
ゲートに電圧がかかっていないとき ソース ゲート ドレイン N 型 N 型 Metal( アルミ電極 ) Oxide( 酸化絶縁膜 ) Semiconductor( 半導体 ) P 型 ゲートに電圧がかかっているときソース ゲート (+) ドレイン P 型 N 型 ー ー ー + + + N 型 FET 8
open-drain enable V DD V DD pin configured as digital output driver output enable data output strong pull-up ESD PIN strong pull-down ESD V SS V DD pull-up enable weak pull-up pin configured as digital input repeater mode enable pull-down enable weak pull-down data input pin configured as analog input analog input select analog input 002aah159 Fig 51. Open-drain mode available on series LPC1100L and LPC1100XL. Standard I/O pad configuration 9
5.0V 2.3V 1.0V 10
3.3V 11
3.3V 12
3.3V 13
3.3V 3.3 (10 10^3) =3.3 10^-4 =0.00033(A) =0.33(mA) しか流れない 10kΩ Low 14
open-drain enable V DD V DD pin configured as digital output driver output enable data output strong pull-up ESD PIN strong pull-down ESD V SS V DD pull-up enable weak pull-up pin configured as digital input repeater mode enable pull-down enable weak pull-down data input pin configured as analog input analog input select analog input 002aah159 Fig 51. Open-drain mode available on series LPC1100L and LPC1100XL. Standard I/O pad configuration 15
16
I²C Inter-Integrated Circuit 17
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SDA SCL GND SDA SCL GND SDA SCL GND SDA SCL GND 0x90 0x98 0xAA Sm 100kHz Fm 400kHz(Push-Pull) Hs 3.4MHz Fm+ 1MHz(True Open-Drain) 0b1001000 0b10010000=0x90 mbed 式 0b01001000=0x48 Arduino 式 19
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open-drain enable V DD V DD pin configured as digital output driver output enable data output strong pull-up ESD PIN strong pull-down ESD V SS V DD pull-up enable weak pull-up pin configured as digital input repeater mode enable pull-down enable weak pull-down data input pin configured as analog input analog input select analog input 002aah159 Fig 51. Open-drain mode available on series LPC1100L and LPC1100XL. Standard I/O pad configuration 21
HIGH LOW I/O 22
LOW AND 23
Fm+ Fm 24
Table 16. Static characteristics (LPC1100, LPC1100L series) continued T amb = 40 C to +85 C, unless otherwise specified. Symbol Parameter Conditions Min Typ [1] Max Unit Standard port pins, RESET I IL LOW-level input current V I = 0 V; on-chip pull-up resistor disabled I IH I OZ HIGH-level input current OFF-state output current V I = V DD ; on-chip pull-down resistor disabled V O =0V; V O = V DD ; on-chip pull-up/down resistors disabled V I input voltage pin configured to provide a digital function [12][13] [14] - 0.5 10 na - 0.5 10 na - 0.5 10 na 0-5.0 V V O output voltage output active 0 - V DD V V IH HIGH-level input voltage 0.7V DD - - V V IL LOW-level input voltage - - 0.3V DD V 3.3 0.7 2.3V HIGH 3.3 0.3 0.99V LOW 25
VDD RPU VOL VDD : VOL = ( RPU + RON ) : RON I I RON RPU = ( VDD - VOL ) I = (5.0V - 0.4V) 3mA = 1.5kΩ 26
Low High 27
I²C VDD 30% 70% VDD 5V 1.5V 3.5V (154nS) (154nS (0.8473 2.2kΩ)) - 15pF 70pF https://www.facebook.com/notes/251385944989166/ 28
Sm: RPU = 1000ns ( 0.8473 70pF ) = 16.9kΩ Fm: RPU = 300ns ( 0.8473 70pF ) = 5.1kΩ Sm 100kHz Fm 400kHz Fm+ 1MHz http://www.nxp.com/documents/user_manual/um10204_ja.pdf Rev.6 ( ) ) 29
RPU = ( VDD - VOL ) I = (5.0V - 0.4V) 3mA = 1.5kΩ I²C Sm: RPU = 1000ns ( 0.8473 70pF ) = 16.9kΩ Fm: RPU = 300ns ( 0.8473 70pF ) = 5.1kΩ 2.2k 10kΩ 30
I²C 31
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ssci.to/2574 33