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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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H8S/2225 数据表(PDF) 607 Page - Renesas Technology Corp |
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H8S/2225 数据表(HTML) 607 Page - Renesas Technology Corp |
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607 / 1071 page  Section 14 IEBus™ Controller (IEB) [H8S/2258 Group] Rev. 5.00 Aug 08, 2006 page 521 of 982 REJ09B0054-0500 Bit Bit Name Initial Value R/W Description 0 ACK 0 R/W Acknowledge bit Status Indicates the data received in the acknowledge bit of the data field. • Acknowledge bit other than in the data field The IEB terminates the transmission and enters the wait state if a NAK is received. In this case, this bit and the TxE flag are set to 1. • Acknowledge bit in the data field The IEB retransmits data up to the maximum number of bytes defined by communications mode until an ACK is received from the receive unit if a NAK is received from the receive unit during data field transmission. In this case, when an ACK is received from the receive unit during retransmission, this flag is not set and transmission will be continued. When transmission is terminated without receiving an ACK, this flag is set to 1. Note: This flag is invalid in broadcast communications. [Setting condition] When the acknowledge bit of 1 (NAK) is detected [Clearing condition] When writing 0 after reading ACK = 1 |
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