- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄98012 > MC68HC55CD (FREESCALE SEMICONDUCTOR INC) 4 CHANNEL(S), SERIAL COMM CONTROLLER, PDSO16 PDF資料下載
參數(shù)資料
| 型號： | MC68HC55CD |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4 CHANNEL(S), SERIAL COMM CONTROLLER, PDSO16 |
| 封裝： | SOIC-16 |
| 文件頁數(shù)： | 17/40頁 |
| 文件大?。?/td> | 284K |
| 代理商： | MC68HC55CD |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁當前第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁
MC68HC55 Technical Data
Technical Data
MC68HC55
24
Functional Description
After the last CRC bit, the DSI_R_PUSH state is entered. This state
ensures that the CRC flag is stable prior to adjusting the receive (and
transmit) FIFO pointers. The DSI_X_POP state prevents an
X_FIFO_POP from occurring at the same time as an R_FIFO_PUSH.
After DSI_X_POP, the state transitions back to the
WAIT_FRAME_DELAY state. This state ensures proper frame spacing
is allowed to charge up the storage capacitors in remote nodes. Notice
that the delay counter was reset at the end of the last CRC bit so the
delay period can start to time out even while the DSI_R_PUSH and
DSI_X_POP states are being processed.
describes the operation of the transmit FIFO. This FIFO is
four levels deep, including the stage which is written into by the SPI and
the stage which provides the data for the current DSI serial transfer.
State transitions in this state machine occur at the trailing edges of
X_FIFO_PUSH and X_FIFO_POP.
Figure 4-5. State Diagram — Transmit FIFO
TX_IDLE
TX_NOT_EMPTY
TX_FULL
~EN or ABORT or RESET/
X_PUSH_PTR = 0
X_POP_PTR = 0
X_FIFO_EMPTY = TRUE
X_FIFO_PUSH/
X_PUSH_PTR = X_PUSH_PTR+1
X_FIFO_EMPTY = FALSE
X_FIFO_PUSH &
X_PUSH_PTR != X_POP_PTR –1/
X_FIFO_POP &
(X_POP_PTR != X_PUSH_PTR –1)/
X_POP_PTR = X_POP_PTR+1
(X_POP_PTR = X_PUSH_PTR –1)/
X_POP_PTR = X_POP_PTR+1
X_FIFO_EMPTY = TRUE
X_PUSH_PTR = X_PUSH_PTR+1
X_FIFO_PUSH &
X_PUSH_PTR = X_POP_PTR –1/
X_PUSH_PTR = X_PUSH_PTR+1
X_FIFO_POP/
X_POP_PTR = X_POP_PTR+1
STATE TRANSITIONS OCCUR
ON THE TRAILING EDGES OF
X_FIFO_PUSH AND X_FIFO_POP
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MC68HC705C4ACFN | 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PQCC44 |
| MC68HC705C4ACP | 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDIP40 |
| MC68HC705C4ACFB | 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PQFP44 |
| MC68HC705CL4FU | 8-BIT, MROM, 1.84 MHz, MICROCONTROLLER, PQFP80 |
| MC68HC705E1P | 8-BIT, OTPROM, 1 MHz, MICROCONTROLLER, PDIP28 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC68HC68T1P | 制造商:Motorola Inc 功能描述: |
| MC68HC705B16CFN | 制造商:Motorola Inc 功能描述: |
| MC68HC705B16FN | 制造商:Rochester Electronics LLC 功能描述: |
| MC68HC705B16NB | 制造商:Rochester Electronics LLC 功能描述: |
| MC68HC705B16NCB | 制造商:Rochester Electronics LLC 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復。