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Z8F021APH020SC 参数 Datasheet PDF下载

Z8F021APH020SC图片预览
型号: Z8F021APH020SC
PDF下载: 下载PDF文件 查看货源
内容描述: Z8喝采! XP -R 4K系列高性能8位微控制器 [Z8 Encore! XP-R 4K Series High-Performance 8-Bit Microcontrollers]
分类和应用: 微控制器和处理器外围集成电路光电二极管时钟
文件页数/大小: 276 页 / 3422 K
品牌: ZILOG [ ZILOG, INC. ]
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Z8 Encore! XP® 4K Series  
Product Specification  
131  
The comparator may be powered down to reduce supply current. See the Power Control  
Register 0 on page 30 for details.  
Because of the propagation delay of the comparator, it is not recommended to enable or  
reconfigure the comparator without first disabling interrupts and waiting for the com-  
parator output to settle. Doing so can result in spurious interrupts. The following exam-  
ple shows how to safely enable the comparator:  
Caution:  
di  
ld cmp0, r0 ; load some new configutation  
nop  
nop  
; wait for output to settle  
clr irq0 ; clear any spurious interrupts pending  
ei  
Comparator Control Register Definitions  
Comparator Control Register  
The Comparator Control Register (CMP0) configures the comparator inputs and sets the  
value of the internal voltage reference.  
Table 78. Comparator Control Register (CMP0)  
BITS  
7
6
5
4
3
2
1
0
INPSEL  
INNSEL  
REFLVL  
Reserved (20-/28-pin)  
REFLVL (8-pin)  
FIELD  
RESET  
R/W  
0
0
0
1
0
1
0
0
R/W  
R/W  
R/W  
R/W  
R/W  
R/W  
R/W  
R/W  
F90H  
ADDR  
INPSEL—Signal Select for Positive Input  
0 = GPIO pin used as positive comparator input  
1 = temperature sensor used as positive comparator input  
INNSEL—Signal Select for Negative Input  
0 = internal reference disabled, GPIO pin used as negative comparator input  
1 = internal reference enabled as negative comparator input  
REFLVL—Internal Reference Voltage Level (this reference is independent of the ADC  
voltage reference). Note that the 8-pin devices contain two additional LSBs for increased  
resolution.  
For 20-/28-pin devices:  
PS022815-0206  
Comparator