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ST72P63BE1M1 Datasheet(PDF) 90 Page - STMicroelectronics |
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ST72P63BE1M1 Datasheet(HTML) 90 Page - STMicroelectronics |
90 / 145 page ![]() ST7263BDx ST7263BHx ST7263BKx ST7263BE 90/145 sion. The resetting of the BUSY bit can then be handled in a similar manner as the BERR flag being set. – AF: Detection of a non-acknowledge bit. In this case, the EVF and AF bits are set by hardware with an interrupt if the ITE bit is set. To resume, set the START or STOP bit. The AF bit is cleared by reading the I2CSR2 reg- ister. However, if read before the completion of the transmission, the AF flag will be set again, thus possibly generating a new interrupt. Soft- ware must ensure either that the SCL line is back at 0 before reading the SR2 register, or be able to correctly handle a second interrupt during the 9th pulse of a transmitted byte. – ARLO: Detection of an arbitration lost condition. In this case the ARLO bit is set by hardware (with an interrupt if the ITE bit is set and the interface goes automatically back to slave mode (the M/SL bit is cleared). Note: In all these cases, the SCL line is not held low; however, the SDA line can remain low if the last bits transmitted are all 0. While AF=1, the SCL line may be held low due to SB or BTF flags that are set at the same time. It is then necessary to re- lease both lines by software. |