參數(shù)資料
型號： SAX-XC878-13FFI3V3
廠商： INFINEON TECHNOLOGIES AG
元件分類： 微控制器/微處理器
英文描述： 8-BIT, FLASH, 24 MHz, RISC MICROCONTROLLER, PQFP64
封裝： PLASTIC, TQFP-64
文件頁數(shù)： 137/141頁
文件大?。?/td> 2385K
代理商： SAX-XC878-13FFI3V3
XC878CLM
Functional Description
Data Sheet
88
V1.1, 2009-08
3.13.2
Baud Rate Generation using Timer 1
In UART modes 1 and 3 of UART module, Timer 1 can be used for generating the
variable baud rates. In theory, this timer could be used in any of its modes. But in
practice, it should be set into auto-reload mode (Timer 1 mode 2), with its high byte set
to the appropriate value for the required baud rate. The baud rate is determined by the
Timer 1 overflow rate and the value of SMOD as follows:
(3.6)
3.14
Normal Divider Mode (8-bit Auto-reload Timer)
Setting bit FDM in register FDCON to 1 configures the fractional divider to normal divider
mode, while at the same time disables baud rate generation (see Figure 25). Once the
fractional divider is enabled (FDEN = 1), it functions as an 8-bit auto-reload timer (with
no relation to baud rate generation) and counts up from the reload value with each input
clock pulse. Bit field RESULT in register FDRES represents the timer value, while bit
field STEP in register FDSTEP defines the reload value. At each timer overflow, an
overflow flag (FDCON.NDOV) will be set and an interrupt request generated. This gives
an output clock fMOD that is 1/n of the input clock fDIV, where n is defined by 256 - STEP.
The output frequency in normal divider mode is derived as follows:
(3.7)
Table 31
Deviation Error for UART with Fractional Divider enabled
f
PCLK
Prescaling Factor
(2BRPRE)
Reload Value
(BR_VALUE + 1)
STEP
Deviation
Error
24 MHz
1
6 (6H)
59 (3BH)
+0.03 %
12 MHz
1
3 (3H)
59 (3BH)
+0.03 %
8MHz
1
2 (2H)
59 (3BH)
+0.03 %
6MHz
1
6 (6H)
236 (ECH)
+0.03 %
Mode 1, 3 baud rate
2
SMOD
fPCLK
×
32 2
256 TH1
–
()
×
-----------------------------------------------------
=
fMOD
fDIV
1
256 STEP
–
------------------------------
×
=
相關PDF資料
PDF描述
SAX-XC878-13FFI5V 8-BIT, FLASH, 24 MHz, RISC MICROCONTROLLER, PQFP64
SAX-XC878CM-13FFI5V 8-BIT, FLASH, 24 MHz, RISC MICROCONTROLLER, PQFP64
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SAX-XC878M-13FFI5V 8-BIT, FLASH, 24 MHz, RISC MICROCONTROLLER, PQFP64
相關代理商/技術參數(shù)
參數(shù)描述
SAX-XC878-16FFA 3V3 AC 功能描述:8位微控制器 -MCU 8-Bit Single Chip Microcontroller 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
SAX-XC878-16FFA 5V AA 功能描述:IC MCU 8BIT FLASH 64-LQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:XC8xx 標準包裝:1,900 系列:XC8xx 核心處理器:XC800 芯體尺寸:8-位 速度:27MHz 連通性:CAN，SPI，SSI，UART/USART 外圍設備:欠壓檢測/復位，POR，PWM，WDT 輸入/輸出數(shù):40 程序存儲器容量:52KB（52K x 8） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:3.25K x 8 電壓 - 電源 (Vcc/Vdd):4.5 V ~ 5.5 V 數(shù)據(jù)轉換器:A/D 8x10b 振蕩器型:內部 工作溫度:-40°C ~ 105°C 封裝/外殼:64-LQFP 包裝:帶卷 (TR)
SAX-XC878-16FFA 5V AC 功能描述:8位微控制器 -MCU 8-Bit Single-Chip Microcontroller 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
SAX-XC878-16FFA5V 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:8-Bit Single-Chip Microcontroller
SAX-XC878-16FFA5VAA 功能描述:8位微控制器 -MCU 8 BIT FLASH 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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