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93AA66A 数据表(PDF) 10 Page - Microchip Technology |
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93AA66A 数据表(HTML) 10 Page - Microchip Technology |
10 / 24 page 93AA66A/B/C, 93LC66A/B/C, 93C66A/B/C DS21795B-page 10 2003 Microchip Technology Inc. 2.9 WRITE ALL (WRAL) The Write All (WRAL) instruction will write the entire memory array with the data specified in the command. For 93AA66A/B/C and 93LC66A/B/C devices, after the last data bit is clocked into DI, the falling edge of CS initiates the self-timed auto-erase and programming cycle. For 93C66A/B/C devices, the self-timed auto- erase and programming cycle is initiated by the rising edge of CLK on the last data bit. Clocking of the CLK pin is not necessary after the device has entered the WRAL cycle. The WRAL command does include an automatic ERAL cycle for the device. Therefore, the WRAL instruction does not require an ERAL instruction but the chip must be in the EWEN status. The DO pin indicates the READY/BUSY status of the device if CS is brought high after a minimum of 250 ns low (TCSL). Note: Issuing a Start bit and then taking CS low will clear the READY/BUSY status from DO. VCC must be ≥ 4.5V for proper operation of WRAL. FIGURE 2-10: WRAL TIMING FOR 93AA AND 93LC DEVICES FIGURE 2-11: WRAL TIMING FOR 93C DEVICES CS CLK DI DO HIGH-Z 1 0 0 01 X ••• X Dx ••• D0 HIGH-Z BUSY READY TWL VCC must be ≥ 4.5V for proper operation of WRAL. TCSL TSV TCZ CS CLK DI DO HIGH-Z 1 0 0 01 X ••• X Dx ••• D0 HIGH-Z BUSY READY TWL TCSL TSV TCZ |
类似零件编号 - 93AA66A |
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类似说明 - 93AA66A |
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