參數(shù)資料
型號(hào): ATF16V8BQL-15PC
廠商: Atmel
文件頁數(shù): 18/26頁
文件大?。?/td> 0K
描述: IC PLD 8CELL LOW PWR 15NS 20DIP
標(biāo)準(zhǔn)包裝: 18
系列: 16V8
可編程類型: EE PLD
宏單元數(shù): 8
輸入電壓: 5V
速度: 15ns
安裝類型: 通孔
封裝/外殼: 20-DIP(0.300",7.62mm)
供應(yīng)商設(shè)備封裝: 20-PDIP
包裝: 管件
25
7707F–AVR–11/10
AT90USB82/162
6.
System Clock and Clock Options
6.1
Clock Systems and their Distribution
Figure 6-1 presents the principal clock systems in the AVR and their distribution. All of the clocks
need not be active at a given time. In order to reduce power consumption, the clocks to modules
not being used can be halted by using different sleep modes, as described in “Power Manage-
ment and Sleep Modes” on page 41. The clock systems are detailed below.
Figure 6-1.
Clock Distribution
6.1.1
CPU Clock – clk
CPU
The CPU clock is routed to parts of the system concerned with operation of the AVR core.
Examples of such modules are the General Purpose Register File, the Status Register and the
data memory holding the Stack Pointer. Halting the CPU clock inhibits the core from performing
general operations and calculations.
6.1.2
I/O Clock – clk
I/O
The I/O clock is used by the majority of the I/O modules, like Timer/Counters, SPI, and USART.
The I/O clock is also used by the External Interrupt module, but note that some external inter-
rupts are detected by asynchronous logic, allowing such interrupts to be detected even if the I/O
clock is halted.
6.1.3
Flash Clock – clk
FLASH
The Flash clock controls operation of the Flash interface. The Flash clock is usually active simul-
taneously with the CPU clock.
General I/O
Modules
CPU Core
RAM
clk
I/O
AVR Clock
Control Unit
clk
CPU
Flash and
EEPROM
clk
FLASH
Source clock
Watchdog Timer
Reset Logic
Clock
Multiplexer
Watchdog clock
Calibrated RC
Oscillator
Crystal
Oscillator
External Clock
System Clock
Prescaler
Clock
Switch
Watchdog
Oscillator
USB
clk
USB (48MHz)
PLL Clock
Prescaler
clk
Pllin (8MHz)
USB PLL
X6
clk
XTAL (2-16 MHz)
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ATF16V8BQL-15PC-RET 制造商:Atmel Corporation 功能描述:
ATF16V8BQL-15PI 功能描述:EEPLD - 電子擦除可編程邏輯設(shè)備 250 GATE EPLD 15NS IND TEMP RoHS:否 制造商:Atmel 邏輯系列:ATF16V8BQL 最大工作頻率:62 MHz 可編程輸入/輸出端數(shù)量:20 電源電流:20 mA 延遲時(shí)間:15 ns 每個(gè)宏指令的積項(xiàng)數(shù):8 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 大電池?cái)?shù)量:8 最小工作溫度:- 40 C 最大工作溫度:+ 85 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-20
ATF16V8BQL-15PU 功能描述:EEPLD - 電子擦除可編程邏輯設(shè)備 15 ns 20 I/O Pins 8 macorcells 8 reg RoHS:否 制造商:Atmel 邏輯系列:ATF16V8BQL 最大工作頻率:62 MHz 可編程輸入/輸出端數(shù)量:20 電源電流:20 mA 延遲時(shí)間:15 ns 每個(gè)宏指令的積項(xiàng)數(shù):8 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 大電池?cái)?shù)量:8 最小工作溫度:- 40 C 最大工作溫度:+ 85 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-20
ATF16V8BQL-15SC 功能描述:EEPLD - 電子擦除可編程邏輯設(shè)備 250 GATE 15 NS WAFER - 15NS RoHS:否 制造商:Atmel 邏輯系列:ATF16V8BQL 最大工作頻率:62 MHz 可編程輸入/輸出端數(shù)量:20 電源電流:20 mA 延遲時(shí)間:15 ns 每個(gè)宏指令的積項(xiàng)數(shù):8 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 大電池?cái)?shù)量:8 最小工作溫度:- 40 C 最大工作溫度:+ 85 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-20
ATF16V8BQL-15SI 功能描述:EEPLD - 電子擦除可編程邏輯設(shè)備 250 GATE 15 NS WAFER - 15NS RoHS:否 制造商:Atmel 邏輯系列:ATF16V8BQL 最大工作頻率:62 MHz 可編程輸入/輸出端數(shù)量:20 電源電流:20 mA 延遲時(shí)間:15 ns 每個(gè)宏指令的積項(xiàng)數(shù):8 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 大電池?cái)?shù)量:8 最小工作溫度:- 40 C 最大工作溫度:+ 85 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-20