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XC68HC912D60FU8 参数 Datasheet PDF下载

XC68HC912D60FU8图片预览
型号: XC68HC912D60FU8
PDF下载: 下载PDF文件 查看货源
内容描述: 超前信息 - 冯4.0 [Advance Information - Rev 4.0]
分类和应用: 微控制器和处理器外围集成电路时钟
文件页数/大小: 432 页 / 2948 K
品牌: MOTOROLA [ MOTOROLA ]
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Freescale Semiconductor, Inc.  
Multiple Serial Interface  
Serial Communication Interface (SCI)  
15.4.3 SCI Register Descriptions  
Control and data registers for the SCI subsystem are described below.  
The memory address indicated for each register is the default address  
that is in use after reset. Both SCI have identical control registers  
mapped in two blocks of eight bytes.  
Bit 7  
BTST  
0
6
BSPL  
0
5
BRLD  
0
4
SBR12  
0
3
SBR11  
0
2
SBR10  
0
1
SBR9  
0
Bit 0  
SBR8  
0
High  
RESET:  
SC0BDH/SC1BDH — SCI Baud Rate Control Register  
$00C0/$00C8  
Bit 7  
SBR7  
0
6
SBR6  
0
5
SBR5  
0
4
SBR4  
0
3
SBR3  
0
2
SBR2  
1
1
SBR1  
0
Bit 0  
SBR0  
0
Low  
RESET:  
SC0BDL/SC1BDL — SCI Baud Rate Control Register  
$00C1/$00C9  
SCxBDH and SCxBDL are considered together as a 16-bit baud rate  
control register.  
Read any time. Write SBR[12:0] anytime. Low order byte must be written  
for change to take effect. Write SBR[15:13] only in special modes. The  
value in SBR[12:0] determines the baud rate of the SCI. The desired  
baud rate is determined by the following formula:  
MCLK  
SCI Baud Rate = --------------------  
16 × BR  
which is equivalent to:  
MCLK  
BR = -----------------------------------------------  
16 × SCI Baud Rate  
BR is the value written to bits SBR[12:0] to establish baud rate.  
NOTE: The baud rate generator is disabled until TE or RE bit in SCxCR2  
register is set for the first time after reset, and/or the baud rate generator  
is disabled when SBR[12:0] = 0.  
68HC(9)12D60 — Rev 4.0  
MOTOROLA  
Advance Information  
241  
Multiple Serial Interface  
For More Information On This Product,  
Go to: www.freescale.com  
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