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MPC82L54AS2 参数 Datasheet PDF下载

MPC82L54AS2图片预览
型号: MPC82L54AS2
PDF下载: 下载PDF文件 查看货源
内容描述: 8位微控制器 [8-bit micro-controller]
分类和应用: 微控制器
文件页数/大小: 74 页 / 1587 K
品牌: MEGAWIN [ MEGAWIN TECHNOLOGY CO., LTD ]
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High Speed Output Mode  
In this mode, the CEXn output (port latch) associated with the PCA module will toggle each  
time a match occurs between the PCA counter and the module’s capture registers. To activate  
this mode the TOGn, MATn, and ECOMn bits in the SFR CCAPMn must be set.  
Pulse Width Modulator Mode  
All of the PCA modules can be used as PWM outputs. The frequency of the output depends  
on the PCA counter. All of the modules will have the same frequency of output because they  
all share the PCA counter. The duty cycle of each module is independently variable using the  
module’s capture register CCAPnL [7:0] and bits EPCnL in SFR PCAPWMn. When the value  
of the SFR CL is less than the value in the module’s {EPCnL, CCAPnL [7:0]}, the output will  
be low. When it is equal to or greater than, the output will be high. When CL overflows from  
FFH to 00H, {EPCnL, CCAPnL [7:0]} is reloaded with the value in {EPCnH, CCAPnH [7:0]}.  
That allows smoothly updating the PWM duty without glitches. The bits PWMn and ECOMn  
bits in the CCAPMn must be set to enable the PWM mode.  
SFR: PCAPWM0 (PCA PWM Mode Auxiliary Register 0 )  
Bit-7  
Bit-6  
Bit-5  
Bit-4  
Bit-3  
Bit-2  
Bit-1  
Bit-0  
-
-
-
-
-
-
EPC0H  
EPC0L  
SFR: PCAPWM1 (PCA PWM Mode Auxiliary Register 1)  
Bit-7  
Bit-6  
Bit-5  
Bit-4  
Bit-3  
Bit-2  
Bit-1  
Bit-0  
-
-
-
-
-
-
EPC1H  
EPC1L  
SFR: PCAPWM2 (PCA PWM Mode Auxiliary Register 2)  
Bit-7  
Bit-6  
Bit-5  
Bit-4  
Bit-3  
Bit-2  
Bit-1  
Bit-0  
-
-
-
-
-
-
EPC2H  
EPC2L  
SFR: PCAPWM3 (PCA PWM Mode Auxiliary Register 3)  
Bit-7  
Bit-6  
Bit-5  
Bit-4  
Bit-3  
Bit-2  
Bit-1  
Bit-0  
-
-
-
-
-
-
EPC3H  
EPC3L  
EPCnL := concatenated with CCAPnL, used to control the duty of the PWM output  
The bit EPCnL is going to be combined with CCAPnL to form a 9-bit data which will  
be compared with PCA counter low byte CL, so to determine the duty of the module-n’s PWM  
output.  
If  
{CL[7:0]}  
<
{ EPCnL, CCAPnL[7:0]} , PWM output LOW  
else  
PWM output HIGH  
EPCnH := Reloaded value of EPCnL while CL[7:0] counts from FFH to 00H  
44  
MPC82x54A Data Sheet  
MEGAWIN  
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