- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄370367 > GMS81C2020LQ (HYNIX SEMICONDUCTOR INC) IC MCU 8-BIT ROMLESS 44-PQFP PDF資料下載
參數(shù)資料
| 型號： | GMS81C2020LQ |
| 廠商： | HYNIX SEMICONDUCTOR INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | IC MCU 8-BIT ROMLESS 44-PQFP |
| 中文描述： | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP64 |
| 封裝： | LQFP-64 |
| 文件頁數(shù)： | 42/93頁 |
| 文件大?。?/td> | 853K |
| 代理商： | GMS81C2020LQ |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁當前第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁
GMS81C1404/GMS81C1408
40
June. 2001 Ver 1.2
11. CLOCK GENERATOR
The clock generator produces the basic clock pulses which
provide the system clock to be supplied to the CPU and pe-
ripheral hardware.
The main system clock oscillator oscillates
with a crystal resonator or a ceramic resonator
connected to the
Xin and Xout pins. External clocks can be input to the main
system clock oscillator. In this case, input a clock signal to
the Xin pin and open the Xout pin.
Figure 11-1 Block Diagram of Clock Pulse Generator
11.1 Oscillation Circuit
X
IN
and X
OUT
are the input and output, respectively, a in-
verting amplifier which can be set for use as an on-chip os-
cillator, as shown in Figure 11-2 .
Figure 11-2 Oscillator Connections
To drive the device from an external clock source, Xout
should be left unconnected while Xin is driven as shown in
Figure 11-3 . There are no requirements on the duty cycle
of the external clock signal, since the input to the internal
clocking circuitry is through a divide-by-two flip-flop, but
minimum and maximum high and low times specified on
the data sheet must be observed.
Oscillation circuit is designed to be used either with a ce-
ramic resonator or crystal oscillator. Since each crystal and
ceramic resonator have their own characteristics, the user
should consult the crystal manufacturer for appropriate
values of external components.
Figure 11-3 External Clock Connections
Note:
When using a system clock oscillator, carry out wir-
ing in the broken line area in Figure 11-2 to prevent
any effects from wiring capacities.
- Minimize the wiring length.
- Do not allow wiring to intersect with other signal
conductors.
- Do not allow wiring to come near changing high
current.
- Set the potential of the grounding position of the
oscillator capacitor to that of V
SS
. Do not ground to
any ground pattern where high current is present.
- Do not fetch signals from the oscillator.
Internal system clock
PRESCALER
CLOCK PULSE
GENERATOR
÷
1
Peripheral clock
÷
2
÷
4
÷
8
÷
16
÷
128
÷
256
÷
512
÷
1024
÷
32
÷
64
÷
2048
STOP
WAKEUP
fxin
OSCILLATION
CIRCUIT
Xout
Xin
Vss
C1
C2
Recommended: C1, C2 = 30pF
±
10pF for Crystals
R1 = 1M
R1
Xout
Xin
Vss
OPEN
External
Clock
Source
相關PDF資料 |
PDF描述 |
|---|---|
| GMS81C2020Q | HYUNDAI MICRO ELECTRONICS 8-BIT SINGLE-CHIP MICROCONTROLLERS |
| GMS81C2112 | HYNIX SEMICONDUCTOR 8-BIT SINGLE-CHIP MICROCONTROLLERS |
| GMS81C2112K | HYNIX SEMICONDUCTOR 8-BIT SINGLE-CHIP MICROCONTROLLERS |
| GMS81C2112Q | HYNIX SEMICONDUCTOR 8-BIT SINGLE-CHIP MICROCONTROLLERS |
| GMS81C2120 | CMOS Single-Chip 8-Bit Microcontroller with A/D Converter & VFD Driver |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| GMS81C2020Q | 制造商:HYNIX 制造商全稱:Hynix Semiconductor 功能描述:HYUNDAI MICRO ELECTRONICS 8-BIT SINGLE-CHIP MICROCONTROLLERS |
| GMS81C2112 | 制造商:HYNIX 制造商全稱:Hynix Semiconductor 功能描述:HYNIX SEMICONDUCTOR 8-BIT SINGLE-CHIP MICROCONTROLLERS |
| GMS81C2112K | 制造商:HYNIX 制造商全稱:Hynix Semiconductor 功能描述:HYNIX SEMICONDUCTOR 8-BIT SINGLE-CHIP MICROCONTROLLERS |
| GMS81C2112Q | 制造商:HYNIX 制造商全稱:Hynix Semiconductor 功能描述:HYNIX SEMICONDUCTOR 8-BIT SINGLE-CHIP MICROCONTROLLERS |
| GMS81C2120 | 制造商:HYNIX 制造商全稱:Hynix Semiconductor 功能描述:HYNIX SEMICONDUCTOR 8-BIT SINGLE-CHIP MICROCONTROLLERS |
發(fā)布緊急采購，3分鐘左右您將得到回復。