- 您现在的位置：买卖IC网 > PDF目录98079 > SDA20C440 (SIEMENS A G) 8-BIT, MROM, MICROCONTROLLER, PQFP80 PDF资料下载
参数资料
| 型号： | SDA20C440 |
| 厂商： | SIEMENS A G |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, MICROCONTROLLER, PQFP80 |
| 封装： | PLASTIC, MQFP-80 |
| 文件页数： | 16/55页 |
| 文件大小： | 990K |
| 代理商： | SDA20C440 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页当前第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页
SDA 20C440
Semiconductor Group
23
Multiprocessor-Communication
Mode III is used for communication in multiprocessor systems. In this mode, 9 data bits are received
and transmitted. The contents of the nineth received data bit is written into bit RB8 of register
SACON1, and the nineth transmitted data bit is taken from bit TB8 of the register SACON1.
When the mask-address-interrupt bit MAI of register SACON1 is set, the SART-module can be
programmed in a way that after a stopbit was received, a transmit-interrupt is released only if bit
RB8 is set. If bit MAI is not set, a transmit-interrupt is never caused when nine databits and the
stopbit are received. Setting of bit MAI is only to be used in mode III.
Loop Back Mode
The loop back mode is only used for test purpose. It is activated when the bit LBE of the SACON0
register is set. In this case, the transmitted informations do not appear on the output pin but they are
switched to the receive part of the SART-module internally. Therefore the transmitted bits are
received simultaneously. The disconnecting of the pins is independend of the setting of the port
function register.
All the control bits are in function, the test can use all kinds of data transmission, all unmasked
interrupt sources also release an interrupt and the receiver must be activated.
Baudrate Generator
The speed of the communication is set by programming the 8-bit-reload-counter and the divider of
the integrated baudrate generator. The baudrate is derived from the clock of a central prescaler and
based on the external reference frequency (quartz, ceramic resonator or RC-oscillator).
Any value between 0 and FFH may be written into the baudrate reload register SABAUD. The
baudrate is calculated as follows:
Standard baudrates may be set according to the following table:
Baudrate
[kBd]
SASCAL
SABAUD
Fault [%]
2.4
3
103
+ 0.16
4.8
3
51
+ 0.16
9.6
3
25
+ 0.16
10.4
3
23
+ 0.16
19.2
3
12
+ 0.16
38.4
0
51
+ 0.16
57.6
0
34
– 0.79
76.8
0
25
+ 0.16
115.2
0
16
+ 2.12
180
0
10
+ 1.01
BR: =
f
REF
2 (SASCAL + 1)
× (SABAUD + 1)
相关PDF资料 |
PDF描述 |
|---|---|
| SDA20C840 | 8-BIT, MROM, 4.5 MHz, MICROCONTROLLER, PQFP80 |
| SDC2200DUT3D | 1500 MHz, MICROPROCESSOR, CPGA453 |
| SDC2800DUT3D | 2000 MHz, MICROPROCESSOR, CPGA453 |
| SED1200F0B | 16 X 50 DOTS DOT MAT LCD DRVR AND DSPL CTLR, PQFP80 |
| SED1210F0A | 16 X 40 DOTS DOT MAT LCD DRVR AND DSPL CTLR, PQFP80 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SDA2101 | 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:FREQUENCY DIVIDER 1:64 |
| SDA2112-2 | 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:TV PLL FOR 125KHZ RESOLUTION |
| SDA2120 | 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:120 MHz PLL for AM/FM Receivers |
| SDA2121-2 | 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:PLL WITH I2C BUS FOR AM/FM RECEIVERS |
| SDA2121-2X | 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:PLL WITH I2C BUS FOR AM/FM RECEIVERS |
发布紧急采购，3分钟左右您将得到回复。