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參數(shù)資料
| 型號： | MC68HC05P9AVDW |
| 廠商： | MOTOROLA INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28 |
| 封裝： | SOIC-28 |
| 文件頁數(shù)： | 37/90頁 |
| 文件大?。?/td> | 285K |
| 代理商： | MC68HC05P9AVDW |
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GENERAL RELEASE SPECIFICATION
MOTOROLA
SIMPLE SERIAL INPUT/OUTPUT PORT
MC68HC05P9A
7-4
Rev. 2.0
7.2.2 SIOP Status Register (SSR)
This register is located at address $000B and contains only two bits.
SPIF — Serial Peripheral Interface Flag
This bit is set upon occurrence of the last rising clock edge and indicates that a
data transfer has taken place. It has no effect on any further transmissions and
can be ignored without problem. SPIF is cleared by reading the SSR with SPIF
set followed by a read or write of the serial data register. If it is cleared before
the last edge of the next byte, it will be set again. Reset clears this bit.
DCOL — Data Collision
This is a read-only status bit which indicates that an invalid access to the data
register has been made. This can occur any time after the rst falling edge of
SCK and before SPIF is set. A read or write of the data register during this time
will result in invalid data being transmitted or received.
DCOL is cleared by reading the status register with SPIF set followed by a read
or write of the data register. If the last part of the clearing sequence is done
after another transmission has been started, DCOL will be set again. If the
DCOL bit is set and the SPIF is not set, clearing the DCOL requires turning the
SIOP off then turning it back on. Reset also clears this bit.
$0B
SPIF
DCOL
000000
RESET:
00000000
Figure 7-4. SIOP Status Register
相關PDF資料 |
PDF描述 |
|---|---|
| MC68HC05P9AVP | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP28 |
| MC68HC05P9AP | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP28 |
| MC68HC05P9ACDW | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28 |
| MC68HC05P9P | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP28 |
| MC68HC05P9CDW | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MC68HC05P9AVP | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit |
| MC68HC05P9DW | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNIT |
| MC68HC05P9P | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNIT |
| MC68HC05PV8 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Techinal Data - rev 1.9 |
| MC68HC05PV8A | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Techinal Data - rev 1.9 |
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