參數(shù)資料
型號: PIC17LC766T-08/L
廠商: Microchip Technology
文件頁數(shù): 28/159頁
文件大小: 0K
描述: IC MCU OTP 16KX16 A/D PWM 84PLCC
標準包裝: 300
系列: PIC® 17C
核心處理器: PIC
芯體尺寸: 8-位
速度: 8MHz
連通性: I²C,SPI,UART/USART
外圍設備: 欠壓檢測/復位,POR,PWM,WDT
輸入/輸出數(shù): 66
程序存儲器容量: 32KB(16K x 16)
程序存儲器類型: OTP
RAM 容量: 902 x 8
電壓 - 電源 (Vcc/Vdd): 3 V ~ 5.5 V
數(shù)據(jù)轉換器: A/D 16x10b
振蕩器型: 外部
工作溫度: 0°C ~ 70°C
封裝/外殼: 84-LCC(J 形引線)
包裝: 帶卷 (TR)
Section 4 Clock Pulse Generator (CPG)
R01UH0025EJ0300 Rev. 3.00
Page 91 of 1336
Sep 24, 2010
SH7261 Group
4.5
Changing the Frequency
The frequency of the CPU clock (I
φ) and peripheral clock (Pφ) can be changed either by changing
the multiplication rate of PLL circuit 1 or by changing the division rates of divider. All of these
are controlled by software through the frequency control register (FRQCR). The methods are
described below.
4.5.1
Changing the Multiplication Rate
A PLL settling time is required when the multiplication rate of PLL circuit 1 is changed. The on-
chip WDT counts the settling time.
1. In the initial state, the multiplication rate of PLL circuit 1 is 1 time.
2. Set a value that will become the specified oscillation settling time in the WDT and stop the
WDT. The following must be set:
WTCSR.TME
= 0: WDT stops
WTCSR.CKS[2:0]: Division ratio of WDT count clock
WTCNT counter: Initial counter value
3. Set the desired value in the STC[2:0] bits. The division ratio can also be set in the IFC[2:0] and
PFC[2:0] bits.
4. This LSI pauses temporarily and the WDT starts incrementing. The CPU and peripheral clocks
both stop and the WDT is supplied with the clock. The clock will continue to be output at the
CKIO pin. This state is the same as software standby mode. Whether or not registers are
initialized depends on the module. For details, see section 27, Power-Down Modes.
5. Supply of the clock that has been set begins at WDT count overflow, and this LSI begins
operating again. The WDT stops after it overflows.
相關PDF資料
PDF描述
PIC17LC766T-08I/PT IC MCU OTP 16KX16 A/D PWM 80TQFP
PIC17LC766T-08I/L IC MCU OTP 16KX16 A/D PWM 84PLCC
PIC17LC766-08/PT IC MCU OTP 16KX16 A/D PWM 80TQFP
PIC16LF1823-I/SL IC MCU 8BIT FLASH 14SOIC
PIC12C508A-04/P IC MCU OTP 512X12 8DIP
相關代理商/技術參數(shù)
參數(shù)描述
PIC18C242/JW 功能描述:8位微控制器 -MCU 16KB 512 RAM 23I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
PIC18C242-E/SO 功能描述:8位微控制器 -MCU 16KB 512 RAM 23I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
PIC18C242-E/SP 功能描述:8位微控制器 -MCU 16KB 512 RAM 23I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
PIC18C242-I/SO 功能描述:8位微控制器 -MCU 16KB 512 RAM 23I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
PIC18C242-I/SO 制造商:Microchip Technology Inc 功能描述:8BIT CMOS MCU SMD 18C242 SOIC28