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GMS90C32-GBPL40 参数 Datasheet PDF下载

GMS90C32-GBPL40图片预览
型号: GMS90C32-GBPL40
PDF下载: 下载PDF文件 查看货源
内容描述: [Microcontroller, 8-Bit, 40MHz, CMOS, PQCC44, PLASTIC, LCC-44]
分类和应用: 时钟微控制器外围集成电路
文件页数/大小: 59 页 / 724 K
品牌: HYNIX [ HYNIX SEMICONDUCTOR ]
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GMS90 Series  
HYUNDAI MicroElectronics  
SERIAL INTERFACE (USART)  
The serial port is full duplex and can operate in four modes (one synchronous mode, three asynchronous modes)  
as illustrated in Table 6. The possible baud rates can be calculated using the formulas given in Table 7.  
Table 6. USART Operating Modes  
SCON  
Mode  
Baudrate  
Description  
SM0  
SM1  
Serial data enters and exits through RxD.  
TxD outputs the shift clock. 8-bit are transmit-  
ted/received (LSB first)  
f
--O----S----C--  
0
1
0
0
12  
8-bit UART  
10 bits are transmitted (through TxD) or  
received (RxD)  
0
1
Timer 1/2 overflow rate  
9-bit UART  
f
fOSC  
--O----S----C--  
------------  
2
3
1
1
0
1
or  
11 bits are transmitted (TxD) or received (RxD)  
32  
64  
9-bit UART  
Like mode 2 except the variable baud rate  
Timer 1/2 overflow rate  
Table 7. Formulas for Calculating Baud rates  
Baud Rate  
Interface Mode  
derived from  
Baudrate  
fOSC  
0
------------  
12  
Oscillator  
2SMOD  
64  
2
------------------  
× fOSC  
2SMOD  
------------------  
32  
1,3  
× (Timer 1 overflow)  
Timer 1 (16-bit timer)  
(8-bit timer with  
8-bit auto reload)  
2SMOD  
f
------------------ ---------------------O----S----C---------------------  
1,3  
×
32  
12 × [256 (TH1)]  
fOSC  
Timer 2  
1,3  
---------------------------------------------------------------------------------  
32 × [65536 (RC2H, RC2L)]  
Oct. 2000 Ver 3.1a  
21  
 
 
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