Clock Arbitration???

**dvkkt** · 04-12-2007, 09:30 PM

Clock arbitration occurs, when the master, during any receive, transmit or repeated Start/Stop condition, de-asserts the SCL pin (SCL allowed to float high). When the SCL pin is allowed to float high, the baud rate generator (BRG) is suspended from counting until the SCL pin is actually sampled high. When the SCL pin is sampled high, the baud rate generator is reloaded with the contentsof SSPADD<6:0> and begins counting.This ensures that the SCL high time will always be at least one BRG rollover count,in the event that the clock is held low by an external device.
Bác nào rõ giải thích giùm tui, đọc hoài mà chả hiểu nó nói cái gì? phần I2C Master mode trong datasheet của con PIC6F87xA trang 96, bác nào giải thích từng đoạn giùm.
1. de-asserts the SCL pin (SCL allowed to float high)
2. When the SCL pin is allowed to float high
3. This ensures that the SCL high time will always be at least one BRG rollover count
Nhận xét chủ quan, tài liệu datasheet thằng microchip viết không sáng sủa lắm, câu chữ lủng củng.

04-12-2007, 09:30 PM	#1
dvkkt Đệ tử 3 túi Tham gia ngày: Oct 2007 Nơi Cư Ngụ: TPHCM Bài gửi: 55 :	Clock Arbitration??? Clock arbitration occurs, when the master, during any receive, transmit or repeated Start/Stop condition, de-asserts the SCL pin (SCL allowed to float high). When the SCL pin is allowed to float high, the baud rate generator (BRG) is suspended from counting until the SCL pin is actually sampled high. When the SCL pin is sampled high, the baud rate generator is reloaded with the contentsof SSPADD<6:0> and begins counting.This ensures that the SCL high time will always be at least one BRG rollover count,in the event that the clock is held low by an external device. Bác nào rõ giải thích giùm tui, đọc hoài mà chả hiểu nó nói cái gì? phần I2C Master mode trong datasheet của con PIC6F87xA trang 96, bác nào giải thích từng đoạn giùm. 1. de-asserts the SCL pin (SCL allowed to float high) 2. When the SCL pin is allowed to float high 3. This ensures that the SCL high time will always be at least one BRG rollover count Nhận xét chủ quan, tài liệu datasheet thằng microchip viết không sáng sủa lắm, câu chữ lủng củng.