参数资料
型号: MTA81010-LPI/P
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 4 MHz, RISC MICROCONTROLLER, PDIP28
封装: PLASTIC, DIP-28
文件页数: 28/76页
文件大小: 745K
代理商: MTA81010-LPI/P
MTA81010
DS39005D-page 34
1995 Microchip Technology Inc.
The oscillator frequency, divided by 4, is available on
the OSC2/CLKOUT pin, and can be used for test
purposes or to synchronize other logic (Figure 2-2 for
timing).
FIGURE 11-1: CRYSTAL OPERATION OR
CERAMIC RESONATOR (XT
OR LP TYPES ONLY)
TABLE 11-1:
CAPACITOR SELECTION
FOR CERAMIC RESONATORS
Higher capacitance increases the stability of oscillator
but also increases the start-up time. These values are
for design guidance only. Since each resonator has its
own characteristics, the user should consult the
resonator manufacturer for appropriate values of
external components.
Oscillator
Type
Resonator
Frequency
Capacitor Range
C1 = C2
XT
455 kHz
2.0 MHz
4.0 MHz
150 - 330 pF
20 - 330 pF
Rs may be required in XT mode for AT strip-cut
crystals to avoid overdriving. See Table 11-1 and
Table 11-2 for recommended values of C1, C2 per
oscillator type and frequency.
C1
C2
XTAL
OSC2
Note1
OSC1
RF
SLEEP
To internal
logic
RS
MTA81010
FIGURE 11-2: EXTERNAL CLOCK INPUT
OPERATION (XT OR LP
TYPES ONLY)
TABLE 11-2:
CAPACITOR SELECTION
FOR CRYSTAL OSCILLATOR
Higher capacitance increases the stability of oscillator
but also increases the start-up time. These values are
for design guidance only. Rs may be required in XT
mode to avoid overdriving crystals with low drive level
specification.
Since
each
crystal
has
its
own
characteristics, the user should consult the crystal
manufacturer
for
appropriate
values of
external
components.
FIGURE 11-3: RC OSCILLATOR (RC TYPE
ONLY)
Osc
Type
Freq
C1
C2
LP
32 kHz
15 pF
XT
100 kHz
200 kHz
450 kHz
1 MHz
2 MHz
4 MHz
15 - 30 pF
15 pF
200 -300 pF
100 -200 pF
15 - 100 pF
15 - 30 pF
15 pF
Clock from
ext. system
OSC1
OSC2
MTA81010
Open
VDD
Rext
Cext
VSS
OSC1
OSC2/CLKOUT
Fosc/4
MTA81010
相关PDF资料
PDF描述
MTA81010S-RCI/SO 8-BIT, OTPROM, 4 MHz, RISC MICROCONTROLLER, PDSO28
MTA81010-XTI/P 8-BIT, OTPROM, 4 MHz, RISC MICROCONTROLLER, PDIP28
MTA81010T-XT/SO 8-BIT, OTPROM, 4 MHz, RISC MICROCONTROLLER, PDSO28
MTA81010S-XTI/SO 8-BIT, OTPROM, 4 MHz, RISC MICROCONTROLLER, PDSO28
MTA81010-LPI/SO 8-BIT, OTPROM, 4 MHz, RISC MICROCONTROLLER, PDSO28
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