參數(shù)資料
型號(hào): MC68HC908JK8CP
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDIP20
封裝: PLASTIC, DIP-20
文件頁(yè)數(shù): 29/56頁(yè)
文件大?。?/td> 648K
代理商: MC68HC908JK8CP
MC68HC908JL8SM/D
Serial Communications Interface Module (SCI)
MC68HC908JL8MC68HC908JK8
SCI Control
Register 1
LOOPS — Loop Mode Select Bit
This read/write bit enables loop mode operation. In loop mode the RxD pin
is disconnected from the SCI, and the transmitter output goes into the
receiver input. Both the transmitter and the receiver must be enabled to use
loop mode. Reset clears the LOOPS bit.
1 = Loop mode enabled
0 = Normal operation enabled
ENSCI — Enable SCI Bit
1 = SCI enabled
TXINV — Transmit Inversion Bit
1 = Transmitter output inverted
M — Mode (Character Length) Bit
1 = 9-bit SCI characters
0 = 8-bit SCI characters
WAKE — Wakeup Condition Bit
This read/write bit determines which condition wakes up the SCI: a logic 1
(address mark) in the most significant bit position of a received character or
an idle condition on the RxD pin. Reset clears the WAKE bit.
1 = Address mark wakeup
0 = Idle line wakeup
ILTY — Idle Line Type Bit
This read/write bit determines when the SCI starts counting logic 1s as idle
character bits. The counting begins either after the start bit or after the stop
bit. If the count begins after the start bit, then a string of logic 1s preceding
the stop bit may cause false recognition of an idle character. Beginning the
count after the stop bit avoids false idle character recognition, but requires
properly synchronized transmissions. Reset clears the ILTY bit.
1 = Idle character bit count begins after stop bit
0 = Idle character bit count begins after start bit
PEN — Parity Enable Bit
1 = Parity function enabled
PTY — Parity Bit
1 = Odd parity
0 = Even parity
$0013
Bit 7
654321
Bit 0
LOOPS
ENSCI
TXINV
M
WAKE
ILTY
PEN
PTY
Reset:
00000000
Figure 27. SCI Control Register 1 (SCC1)
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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