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| 型号： | MCP1631RD-DCPC1 |
| 厂商： | Microchip Technology |
| 文件页数： | 24/44页 |
| 文件大小： | 0K |
| 描述： | REF DES BATT CHARG OR LED DRIVER |
| 标准包装： | 1 |
| 电流 - 输出 / 通道： | 700mA |
| 输出及类型： | 1，非隔离 |
| 特点： | 用于锂离子、镍氢和镍镉电池充电器的固件 |
| 输入电压： | 3.5 ~ 16 V |
| 已供物品： | 板 |
| 已用 IC / 零件： | MCP1631HV，PIC16F616 |
| 产品目录页面： | 668 (CN2011-ZH PDF) |
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PIC16F610/616/16HV610/616
DS41288F-page 30
2009 Microchip Technology Inc.
3.3.4
EXTERNAL RC MODES
The external Resistor-Capacitor (RC) modes support
the use of an external RC circuit. This allows the
designer maximum flexibility in frequency choice while
keeping costs to a minimum when clock accuracy is not
required. There are two modes: RC and RCIO.
In RC mode, the RC circuit connects to OSC1. OSC2/
CLKOUT outputs the RC oscillator frequency divided
by 4. This signal may be used to provide a clock for
external circuitry, synchronization, calibration, test or
other application requirements. Figure 3-5 shows the
external RC mode connections.
FIGURE 3-5:
EXTERNAL RC MODES
In RCIO mode, the RC circuit is connected to OSC1.
OSC2 becomes an additional general purpose I/O pin.
The RC oscillator frequency is a function of the supply
voltage, the resistor (REXT) and capacitor (CEXT) values
and the operating temperature. Other factors affecting
the oscillator frequency are:
threshold voltage variation
component tolerances
packaging variations in capacitance
The user also needs to take into account variation due
to tolerance of external RC components used.
3.4
Internal Clock Modes
The Oscillator module provides a selectable system
clock source of either 4 MHz or 8 MHz. The selectable
frequency is configured through the IOSCFS bit of the
Configuration Word.
The frequency of the internal oscillator can be can be
user-adjusted
via software using the OSCTUNE
register.
3.4.1
INTOSC AND INTOSCIO MODES
The INTOSC and INTOSCIO modes configure the
internal oscillators as the system clock source when
the device is programmed using the oscillator selection
or the FOSC<2:0> bits in the Configuration Word
register
(CONFIG).
See
Features of the CPU” for more information.
In INTOSC mode, OSC1/CLKIN is available for general
purpose I/O. OSC2/CLKOUT outputs the selected
internal oscillator frequency divided by 4. The CLKOUT
signal may be used to provide a clock for external
circuitry, synchronization, calibration, test or other
application requirements.
In INTOSCIO mode, OSC1/CLKIN and OSC2/CLKOUT
are available for general purpose I/O.
OSC2/CLKOUT(1)
CEXT
REXT
PIC MCU
OSC1/CLKIN
FOSC/4 or
Internal
Clock
VDD
VSS
Recommended values: 10 k
Ω ≤ REXT ≤ 100 kΩ, <3V
3 k
Ω ≤ REXT ≤ 100 kΩ, 3-5V
CEXT > 20 pF, 2-5V
Note
1:
Alternate pin functions are listed in
2:
Output depends upon RC or RCIO Clock
mode.
I/O(2)
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| MCP1631RD-MCC1 | 功能描述:电源管理IC开发工具 MCP1631HV Multi-Chem Chrgr Ref Design RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
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