He aha te I2C
Ko te I2C he kawa rangatū e whakamahia ana mo te atanga waea-rua hei hono i nga taputapu iti-tere penei i nga microcontrollers, EEPROMs, A/D me D/A converters, atanga I/O, me etahi atu peripheral rite i roto i nga punaha whakauru. He tukutahi, he rangatira maha, he taurekareka, he whakawhiti paatete, he mutunga kotahi, he pahi korero rangatū i hangaia e Philips Semiconductors (inaianei ko NXP Semiconductors) i te tau 1982.
Ka whakamahia e I²C e rua nga awa Tuwhera Tuwhera (raraunga rangatū (SDA) me te karaka rangatū (SCL)) me te whakamahi i nga parenga ki te kukume i te kaha. Ka taea e I²C te awhe ngaohiko whakahaere nui, engari ko te taumata ngaohiko angamaheni he +3.3V, +5v ranei.
Ka whakamahia e te hoahoa tohutoro I²C he mokowā wāhitau 7-bit engari e 16 ngā wāhitau kei te rāhui, kia taea ai e ia te kōrero ki te 112 ngā kōpuku i roto i te roopu pahi [a]. He rereke nga ahuatanga o te pahi I²C noa: aratau paerewa (100 kbit/s), aratau iti-tere (10 kbit/s), engari ka taea te tuku i te auau karaka kia taka ki te kore, ko te tikanga ka whakatarewahia te korero. Ka taea e te reanga hou o te pahi I²C te whakawhitiwhiti korero me etahi atu pona (tautoko mokowhiti moka-10) i te tere tere: aratau tere (400 kbit/s), aratau tere me te (1 Mbit/s), aratau tere-tere (3.4 Mbit /s), aratau tere-tere (5 Mbit/s).
He aha te I²S?
Ko te I²S (Inter-IC Sound) he paerewa atanga pahi rangatū hiko e whakamahia ana mo te hono tahi i nga taputapu ororongo mamati, i whakauruhia tenei paerewa e Philips Semiconductor i te tau 1986. Ka whakamahia hei whakawhiti i nga raraunga ororongo PCM i waenga i nga iahiko whakauru i nga taputapu hiko.
Te Atanga Pūmārō I2S:
1. Raina karaka moka
Ka karanga okawa "Karaka Rangatū Tonu (SCK)". Ko te tikanga ka tuhia hei "karaka moka (BCLK)".
Arā, ko ia moka o te raraunga e hāngai ana ki te ororongo matihiko, he paoro to SCLK.
Te auau o te SCLK = 2 × te auau tauira × te maha o nga paraka tauira.
2. Raina karaka kupu
E mohiotia ana ko "whiriwhiri kupu (WS)". [E kiia ana ko "LRCLK" ranei "Tukutahi anga (FS)".
0 = hongere maui, 1 = hongere matau
3. Kia kotahi te iti rawa o te raina raraunga maha
Ka kiia ko "Raraunga Rangatū (SD)", engari ka taea te karanga ko SDATA, SDIN, SDOUT, DACDAT, ADCDAT, aha atu.
Hoahoa wa o I²S
