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AS2701AT Datasheet(PDF) 10 Page - ams AG |
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AS2701AT Datasheet(HTML) 10 Page - ams AG |
10 / 16 page AS-Interface Slave IC AS2701A (ISA3+) Rev. C, October 2000 Page 10 of 16 e) Interface to the ext. E 2PROM (U5R, SCL, SDA) / functional, electrical and timing characteristics Symbol Parameter min max Unit Note VU5R Output Voltage to E 2PROM 4.5 5.5 V IU5R ≤3 mA CU5R Load Capacity to U5R 10 220 nF Ceramics capacitor IU5R Output Current to U5R 3 mA VOL Output Voltage “Low” 0 0.2 * VU5R V IOL = 10 µA VOH Output Voltage “High” 0.8 * VU5R VU5R V -IOH = 10 µA VIL Input Voltage “Low”(only SDA) -0.3 0.3 * VU5R V -IIL = 1.5… 0.2mA VIH Input Voltage “High”(only SDA) 0.7 * VU5R VU5R + 0.3 V IIH = -1… 1 µA tDATAinSU Set-up Time for Data Input 0.25 µs tDATAinHO Hold Time for Data Input 0 µs tAA Time from SCK Low to SDA Data Out and ACK Out 3.5 µs tDATAoutHO Hold Time for Data Output 0.3 µs tSTARTSU Set-up Time for Start Condition 4.7 µs tSTARTHO Hold Time for Start Condition 4 µs tSTOPSU Set-up Time for Stop Condition 4.7 µs tBUF Time which has to be Free for Bus: Before Next Transmission 4.7 µs tR Rise Time 1000 ns tF Fall Time 300 ns tLOW Impulse LOW Time 4700 ns tHIGH Impuls HIGH Time 4000 ns tSCL Clock Frequency for E 2PROM 100 kHz fc = 5.333 MHz SCL SDA in SDA out t STARTSU t LOW t DATAinHO t DATAoutHO t DATAinSU t STARTHO t F t F t AA t HIGH t STOPSU t R t BUF t R The U5R supply pin provides a typically 5V supply voltage to the external E 2PROM, and has a biasing capability only for this purpose. Programming of the E 2PROM is possible with the E2PROM soldered-in into the AS-Interface Slave unit's pc-board by accessing the SCL / SDA serial bus with an external programming hardware. |
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