參數(shù)資料
型號： MC68HC705C9ACFNE
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PQCC44
封裝： PLASTIC, LCC-44
文件頁數(shù)： 81/118頁
文件大?。?/td> 750K
代理商： MC68HC705C9ACFNE
Transmit Data Out (TDO)
MC68HC05C9A Advance Information Data Sheet, Rev. 4.1
Freescale Semiconductor
65
9.12 Transmit Data Out (TDO)
Transmit data is the serial data from the internal data bus that is applied through the SCI to the output
line. Data format is as discussed in 9.6 Data Format and shown in Figure 9-3. The transmitter generates
a bit time by using a derivative of the RT clock, thus producing a transmission rate equal to 1/16th that of
the receiver sample clock.
9.13 SCI I/O Registers
The following I/O registers control and monitor SCI operation:
SCI data register (SCDR)
SCI control register 1 (SCCR1)
SCI control register 2 (SCCR2)
SCI status register (SCSR)
9.13.1 SCI Data Register
The SCI data register (SCDR), shown in Figure 9-8, is the buffer for characters received and for
characters transmitted.
9.13.2 SCI Control Register 1
The SCI control register 1 (SCCR1), shown in Figure 9-9, has these functions:
Stores ninth SCI data bit received and ninth SCI data bit transmitted
Controls SCI character length
Controls SCI wakeup method
R8 — Bit 8 (Received)
When the SCI is receiving 9-bit characters, R8 is the ninth bit of the received character. R8 receives
the ninth bit at the same time that the SCDR receives the other eight bits. Resets have no effect on the
R8 bit.
$0011
Bit 7
6543
2
1
Bit 0
Read:
BIT7
BIT6
BIT55
BIT4
BIT3
BIT2
BIT1
BIT0
Write:
Reset:
Unaffected by reset
Figure 9-8. SCI Data Register (SCDR)
$000E
Bit 7
6543
2
1
Bit 0
Read:
R8
T8
M
WAKE
Write:
Reset:
U
0
U
0
= Unimplemented
U = Undetermined
Figure 9-9. SCI Control Register 1 (SCCR1)
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相關代理商/技術參數(shù)
參數(shù)描述
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MC68HC705C9ACPE 制造商:Freescale Semiconductor 功能描述:
MC68HC705C9AFNE 功能描述:8位微控制器 -MCU 8B MCU 352 BYTES RAM RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
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MC68HC705E6CDW 制造商:Motorola Inc 功能描述: 制造商:MOTOROLA 功能描述:
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