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參數(shù)資料
| 型號(hào)： | 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)： | 77/118頁 |
| 文件大?。?/td> | 750K |
| 代理商： | MC68HC705C9ACFNE |
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Functional Description
MC68HC05C9A Advance Information Data Sheet, Rev. 4.1
Freescale Semiconductor
61
9.5 Functional Description
A block diagram of the SCI is shown in Figure 9-1. Option bits in serial control register1 (SCCR1) select
the wakeup method (WAKE bit) and data word length (M bit) of the SCI. SCCR2 provides control bits that
individually enable the transmitter and receiver, enable system interrupts, and provide the wakeup enable
bit (RWU) and the send break code bit (SBK). Control bits in the baud rate register (BAUD) allow the user
to select one of 32 different baud rates for the transmitter and receiver.
Data transmission is initiated by writing to the serial communications data register (SCDR). Provided the
transmitter is enabled, data stored in the SCDR is transferred to the transmit data shift register. This
transfer of data sets the transmit data register empty flag (TDRE) in the SCI status register (SCSR) and
generates an interrupt (if transmitter interrupts are enabled). The transfer of data to the transmit data shift
register is synchronized with the bit rate clock (see Figure 9-2). All data is transmitted least significant bit
first. Upon completion of data transmission, the transmission complete flag (TC) in the SCSR is set
(provided no pending data, preamble, or break is to be sent) and an interrupt is generated (if the transmit
complete interrupt is enabled). If the transmitter is disabled, and the data, preamble, or break (in the
transmit data shift register) has been sent, the TC bit will be set also. This will also generate an interrupt
if the transmission complete interrupt enable bit (TCIE) is set. If the transmitter is disabled during a
transmission, the character being transmitted will be completed before the transmitter gives up control of
the TDO pin.
When SCDR is read, it contains the last data byte received, provided that the receiver is enabled. The
receive data register full flag bit (RDRF) in the SCSR is set to indicate that a data byte has been
transferred from the input serial shift register to the SCDR; this will cause an interrupt if the receiver
interrupt is enabled. The data transfer from the input serial shift register to the SCDR is synchronized by
the receiver bit rate clock. The OR (overrun), NF (noise), or FE (framing) error flags in the SCSR may be
set if data reception errors occurred.
An idle line interrupt is generated if the idle line interrupt is enabled and the IDLE bit (which detects idle
line transmission) in SCSR is set. This allows a receiver that is not in the wakeup mode to detect the end
of a message, or the preamble of a new message, or to re-synchronize with the transmitter. A valid
character must be received before the idle line condition or the IDLE bit will not be set and idle line
interrupt will not be generated.
Figure 9-2. Rate Generator Division
OSC FREQ
(fOSC)
÷2
BUS FREQ
(fOP)
SCP0–SCP1
SCI PRESCALER
SELECT
N
SCR0–SCR2
SCI RATE
SELECT
M
÷16
SCI TRANS
CLOCK (TX)
SCI RECEIVE
CLOCK (RT)
CONTROL
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| MC68HC705C9ACP | 功能描述:IC MCU 2.1MHZ 16K OTP 40-DIP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:HC05 其它有關(guān)文件:STM32F101T8 View All Specifications 特色產(chǎn)品:STM32 32-bit Cortex MCUs 標(biāo)準(zhǔn)包裝:490 系列:STM32 F1 核心處理器:ARM? Cortex?-M3 芯體尺寸:32-位 速度:36MHz 連通性:I²C，IrDA，LIN，SPI，UART/USART 外圍設(shè)備:DMA，PDR，POR，PVD，PWM，溫度傳感器，WDT 輸入/輸出數(shù):26 程序存儲(chǔ)器容量:64KB（64K x 8） 程序存儲(chǔ)器類型:閃存 EEPROM 大小:- RAM 容量:10K x 8 電壓 - 電源 (Vcc/Vdd):2 V ~ 3.6 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 10x12b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:36-VFQFN，36-VFQFPN 包裝:托盤 配用:497-10030-ND - STARTER KIT FOR STM32497-8853-ND - BOARD DEMO STM32 UNIV USB-UUSCIKSDKSTM32-PL-ND - KIT IAR KICKSTART STM32 CORTEXM3497-8512-ND - KIT STARTER FOR STM32F10XE MCU497-8505-ND - KIT STARTER FOR STM32F10XE MCU497-8304-ND - KIT STM32 MOTOR DRIVER BLDC497-6438-ND - BOARD EVALUTION FOR STM32 512K497-6289-ND - KIT PERFORMANCE STICK FOR STM32MCBSTM32UME-ND - BOARD EVAL MCBSTM32 + ULINK-MEMCBSTM32U-ND - BOARD EVAL MCBSTM32 + ULINK2更多... 其它名稱:497-9032STM32F101T8U6-ND |
| 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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(fēng)格:SMD/SMT |
| MC68HC705C9AVFNE | 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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(fēng)格:SMD/SMT |
| MC68HC705E6CDW | 制造商:Motorola Inc 功能描述: 制造商:MOTOROLA 功能描述: |
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