参数资料
型号: MC68HC912BL16FU8
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 16-BIT, FLASH, 8 MHz, MICROCONTROLLER, PQFP64
封装: QFP-64
文件页数: 13/128页
文件大小: 3326K
代理商: MC68HC912BL16FU8
MC68HC912BL16TS/D
11
Figure 4 Common Crystal Connections
Figure 5 External Oscillator Connections
XTAL is the crystal output. The XTAL pin must be left unterminated when an external CMOS compatible
clock input is connected to the EXTAL pin. The XTAL output is normally intended to drive only a crystal.
The XTAL output can be buffered with a high-impedance buffer to drive the EXTAL input of another de-
vice.
In all cases take extra care in the circuit board layout around the oscillator pins. Load capacitances
shown in the oscillator circuits include all stray layout capacitances. Refer to Figure 4 and Figure 5 for
diagrams of oscillator circuits.
3.3.2 E-Clock Output (ECLK)
ECLK is the output connection for the internal bus clock and is used to demultiplex the address and data
and is used as a timing reference. ECLK frequency is equal to 1/2 the crystal frequency out of reset.
In normal single-chip mode the E-clock output is off at reset to reduce the effects of RFI but can be
turned on if necessary.
In special single-chip mode the E-clock output is on at reset but can be turned off.
In special peripheral mode the E clock is an input to the MCU.
All clocks, including the E-clock, are halted when the MCU is in STOP mode. It is possible to configure
the MCU to interface to slow external memory. ECLK can be stretched for such accesses.
10 M
MCU
C
EXTAL
XTAL
2 x E
CRYSTAL
COMMON XTAL CONN
NC
MCU
EXTAL
XTAL
2 x E
CMOS-COMPATIBLE
EXT EXTAL CONN
EXTERNAL OSCILLATOR
F
re
e
sc
a
le
S
e
m
ic
o
n
d
u
c
to
r,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
c
..
.
相关PDF资料
PDF描述
MC68HC912BL16VFU8 16-BIT, FLASH, 8 MHz, MICROCONTROLLER, PQFP64
MK74CG117AFT 90 MHz, OTHER CLOCK GENERATOR, PDSO48
MC68HC08AS32ACFU 8-BIT, MROM, 8.4 MHz, MICROCONTROLLER, PQFP64
MC68HRC98JL3ECFA 8-BIT, FLASH, 4 MHz, MICROCONTROLLER, PQFP48
MC68HRC98JL3EMDW 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDSO28
相关代理商/技术参数
参数描述
MC68HC916P1CAA16 功能描述:16位微控制器 - MCU 16B MCU 32K FLASH RoHS:否 制造商:Texas Instruments 核心:RISC 处理器系列:MSP430FR572x 数据总线宽度:16 bit 最大时钟频率:24 MHz 程序存储器大小:8 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:2 V to 3.6 V 工作温度范围:- 40 C to + 85 C 封装 / 箱体:VQFN-40 安装风格:SMD/SMT
MC68HC916P1CFU16 制造商:Rochester Electronics LLC 功能描述:16BIT W/32KB FLASH EEPRO - Bulk
MC68HC916P1VAA16 功能描述:IC MCU 32K FLASH 16MHZ 80-QFP RoHS:是 类别:集成电路 (IC) >> 嵌入式 - 微控制器, 系列:HC16 标准包装:1 系列:AVR® ATmega 核心处理器:AVR 芯体尺寸:8-位 速度:16MHz 连通性:I²C,SPI,UART/USART 外围设备:欠压检测/复位,POR,PWM,WDT 输入/输出数:32 程序存储器容量:32KB(16K x 16) 程序存储器类型:闪存 EEPROM 大小:1K x 8 RAM 容量:2K x 8 电压 - 电源 (Vcc/Vdd):2.7 V ~ 5.5 V 数据转换器:A/D 8x10b 振荡器型:内部 工作温度:-40°C ~ 125°C 封装/外壳:44-TQFP 包装:剪切带 (CT) 其它名称:ATMEGA324P-B15AZCT
MC68HC916P3CFU16 制造商:Rochester Electronics LLC 功能描述:16BIT MCU FOR GENERAL - Bulk
MC68HC98LJ12CFU 制造商:Rochester Electronics LLC 功能描述: 制造商:Freescale Semiconductor 功能描述: