參數(shù)資料
型號： S9S12Q12J2VFAE1
廠商： Freescale Semiconductor
文件頁數(shù)： 341/644頁
文件大?。?/td> 0K
描述： MCU 16BIT 48LQFP
標準包裝： 250
系列： HCS12
核心處理器： HCS12
芯體尺寸： 16-位
速度： 16MHz
連通性： CAN，EBI/EMI，SCI，SPI
外圍設(shè)備： POR，PWM，WDT
輸入/輸出數(shù)： 31
程序存儲器容量： 128KB（128K x 8）
程序存儲器類型： 閃存
RAM 容量： 4K x 8
電壓 - 電源 (Vcc/Vdd)： 2.35 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 8x10b
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 105°C
封裝/外殼： 48-LQFP
包裝： 托盤
Chapter 13 Serial Communications Interface (S12SCIV2) Block Description
Freescale Semiconductor
MC9S12Q128
405
Rev 1.10
13.4.5
Single-Wire Operation
Normally, the SCI uses two pins for transmitting and receiving. In single-wire operation, the RXD pin is
disconnected from the SCI. The SCI uses the TXD pin for both receiving and transmitting.
Figure 13-22. Single-Wire Operation (LOOPS = 1, RSRC = 1)
Enable single-wire operation by setting the LOOPS bit and the receiver source bit, RSRC, in SCI control
register 1 (SCICR1). Setting the LOOPS bit disables the path from the Rx Input signal to the receiver.
Setting the RSRC bit connects the receiver input to the output of the TXD pin driver. Both the transmitter
and receiver must be enabled (TE = 1 and RE = 1).The TXDIR bit (SCISR2[1]) determines whether the
TXD pin is going to be used as an input (TXDIR = 0) or an output (TXDIR = 1) in this mode of operation.
13.4.6
Loop Operation
In loop operation the transmitter output goes to the receiver input. The Rx Input signal is disconnected
from the SCI
.
Figure 13-23. Loop Operation (LOOPS = 1, RSRC = 0)
Enable loop operation by setting the LOOPS bit and clearing the RSRC bit in SCI control register 1
(SCICR1). Setting the LOOPS bit disables the path from the Rx Input signal to the receiver. Clearing the
RSRC bit connects the transmitter output to the receiver input. Both the transmitter and receiver must be
enabled (TE = 1 and RE = 1).
13.5
Initialization Information
13.5.1
Reset Initialization
The reset state of each individual bit is listed in Section 13.3, “Memory Map and Registers” which details
the registers and their bit elds. All special functions or modes which are initialized during or just
following reset are described within this section.
RXD
TRANSMITTER
RECEIVER
Tx OUTPUT SIGNAL
Tx INPUT SIGNAL
RXD
TRANSMITTER
RECEIVER
Tx OUTPUT SIGNAL
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
S9S12Q12J2VFAE1R 功能描述:16位微控制器 - MCU HCS12 MICROCONTROL RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數(shù)據(jù)總線寬度:16 bit 最大時鐘頻率:24 MHz 程序存儲器大小:8 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風格:SMD/SMT
S9S12Q12J2VFUE1 制造商:Freescale Semiconductor 功能描述:16-BIT HCS12 CISC 128KB FLASH 2.5V/5V 80-PIN PQFP TRAY - Trays
S9S12Q12J2VFUE1R 制造商:Freescale Semiconductor 功能描述:16-BIT HCS12 CISC 128KB FLASH 2.5V/5V 80-PIN PQFP T/R - Tape and Reel
S9S12Q32F1CFAE1 制造商:Freescale Semiconductor 功能描述:16-BIT HCS12 CISC 32KB FLASH 2.5V/5V 48-PIN LQFP TRAY - Bulk
S9S12Q32F1MFAE1 制造商:Freescale Semiconductor 功能描述:16-BIT HCS12 CISC 32KB FLASH 2.5V/5V 48-PIN LQFP TRAY - Bulk
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