参数资料
型号: PIC18F6620-E/PT
厂商: Microchip Technology
文件页数: 88/165页
文件大小: 0K
描述: IC PIC MCU FLASH 32KX16 64TQFP
产品培训模块: Asynchronous Stimulus
标准包装: 160
系列: PIC® 18F
核心处理器: PIC
芯体尺寸: 8-位
速度: 25MHz
连通性: I²C,SPI,UART/USART
外围设备: 欠压检测/复位,LVD,POR,PWM,WDT
输入/输出数: 52
程序存储器容量: 64KB(32K x 16)
程序存储器类型: 闪存
EEPROM 大小: 1K x 8
RAM 容量: 3.75K x 8
电压 - 电源 (Vcc/Vdd): 4.2 V ~ 5.5 V
数据转换器: A/D 12x10b
振荡器型: 外部
工作温度: -40°C ~ 125°C
封装/外壳: 64-TQFP
包装: 托盘
2004 Microchip Technology Inc.
DS39609B-page 27
PIC18F6520/8520/6620/8620/6720/8720
If the main oscillator is configured for HS-PLL mode, an
oscillator start-up time (TOST), plus an additional PLL
time-out (TPLL), will occur. The PLL time-out is typically
2 ms and allows the PLL to lock to the main oscillator
frequency. A timing diagram, indicating the transition
from the Timer1 oscillator to the main oscillator for
HS-PLL mode, is shown in Figure 2-10.
FIGURE 2-10:
TIMING FOR TRANSITION BETWEEN TIMER1 AND OSC1 (HS WITH PLL)
If the main oscillator is configured in the RC, RCIO, EC
or ECIO modes, there is no oscillator start-up time-out.
Operation will resume after eight cycles of the main
oscillator have been counted. A timing diagram,
indicating the transition from the Timer1 oscillator to the
main oscillator for RC, RCIO, EC and ECIO modes, is
shown in Figure 2-11.
FIGURE 2-11:
TIMING FOR TRANSITION BETWEEN TIMER1 AND OSC1 (RC, EC)
Q4
Q1
Q2 Q3
Q4
Q1 Q2
OSC1
Internal System
SCS
(OSCCON<0>)
Program Counter
PC
PC + 2
Note 1: TOST = 1024 TOSC (drawing not to scale).
T1OSI
Clock
TOST
Q3
PC + 4
TPLL
TOSC
TT1P
TSCS
Q4
OSC2
PLL Clock
Input
1
2
3
4
56
78
Q3
Q4
Q1
Q1 Q2
Q3
Q4 Q1
Q2
Q3
OSC1
Internal System
SCS
(OSCCON<0>)
Program
PC
PC + 2
Note 1: RC Oscillator mode assumed.
PC + 4
T1OSI
Clock
OSC2
Q4
TT1P
TOSC
TSCS
1
23
45
6
78
Counter
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