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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 ]
 浏览型号GMS90C32-GBPL40的Datasheet PDF文件第19页浏览型号GMS90C32-GBPL40的Datasheet PDF文件第20页浏览型号GMS90C32-GBPL40的Datasheet PDF文件第21页浏览型号GMS90C32-GBPL40的Datasheet PDF文件第22页浏览型号GMS90C32-GBPL40的Datasheet PDF文件第24页浏览型号GMS90C32-GBPL40的Datasheet PDF文件第25页浏览型号GMS90C32-GBPL40的Datasheet PDF文件第26页浏览型号GMS90C32-GBPL40的Datasheet PDF文件第27页  
GMS90 Series  
HYUNDAI MicroElectronics  
TIMER / COUNTER 0 AND 1  
Timer/Counter 0 and 1 can be used in four operating modes as listed in Table 4:  
Table 4. Timer/Counter 0 and 1 Operating Modes  
TMOD  
Input Clock  
Mode  
Description  
Gate  
X
C/T  
X
M1  
0
M0  
0
internal  
external (Max.)  
8-bit timer/counter with a  
divide-by-32 prescaler  
f
OSC ÷(12×32)  
fOSC ÷(24×32)  
0
1
2
f
f
OSC ÷12  
OSC ÷12  
f
f
OSC ÷24  
OSC ÷24  
16-bit timer/counter  
X
X
0
1
8-bit timer/counter with  
8-bit auto-reload  
X
X
1
0
Timer/counter 0 used as  
one 8-bit timer/counter and  
one 8-bit timer Timer 1  
stops  
f
OSC ÷12  
f
OSC ÷24  
3
X
X
1
1
In the "timer" function (C/T = "0") the register is incremented every machine cycle. Therefore the count rate is  
OSC/12.  
f
In the "counter" function the register is incremented in response to a 1-to-0 transition at its corresponding exter-  
nal input pin (P3.4/T0, P3.5/T1). Since it takes two machine cycles to detect a falling edge the max. count rate  
is fOSC/24. External inputs INT0 and INT1 (P3.2, P3.3) can be programmed to function as a gate to facilitate  
pulse width measurements. Figure 2 illustrates the input clock logic.  
f
÷
12  
OSC  
f
÷ 12  
OSC  
C/T  
TMOD  
0
Timer 0/1  
Input Clock  
P3.4/T0  
P3.5/T1  
1
Max. f  
/24  
OSC  
TR0 / 1  
TCON  
&
Gate  
=1  
TMOD  
1  
P3.2 / INT0  
P3.3 / INT1  
Figure 2. Timer/Counter 0 and 1 Input Clock Logic  
Oct. 2000 Ver 3.1a  
19  
 
 
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