- 您现在的位置：买卖IC网 > PDF目录10932 > MC68331CEH20 (Freescale Semiconductor)IC MCU 32BIT 20MHZ 132-PQFP PDF资料下载
参数资料
| 型号： | MC68331CEH20 |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 17/84页 |
| 文件大小： | 0K |
| 描述： | IC MCU 32BIT 20MHZ 132-PQFP |
| 标准包装： | 36 |
| 系列： | M683xx |
| 核心处理器： | CPU32 |
| 芯体尺寸： | 32-位 |
| 速度： | 20MHz |
| 连通性： | EBI/EMI，SCI，SPI，UART/USART |
| 外围设备： | POR，PWM，WDT |
| 输入/输出数： | 18 |
| 程序存储器类型： | ROMless |
| 电压 - 电源 (Vcc/Vdd)： | 4.5 V ~ 5.5 V |
| 振荡器型： | 内部 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 132-BQFP 缓冲式 |
| 包装： | 托盘 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页当前第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页
24
MC68331TS/D
When the on-chip clock synthesizer is used, system clock frequency is controlled by the bits in the upper
byte of SYNCR. Bits in the lower byte show status of or control operation of internal and external clocks.
The SYNCR can be read or written only when the CPU is operating at the supervisor privilege level.
W —Frequency Control (VCO)
This bit controls a prescaler tap in the synthesizer feedback loop. Setting the bit increases the VCO
speed by a factor of four. VCO relock delay is required.
X —Frequency Control Bit (Prescale)
This bit controls a divide by two prescaler that is not in the synthesizer feedback loop. Setting the bit
doubles clock speed without changing the VCO speed. There is no VCO relock delay.
Y[5:0] —Frequency Control (Counter)
The Y field controls the modulus down counter in the synthesizer feedback loop, causing it to divide by
a value of Y
+ 1. Values range from 0 to 63. VCO relock delay is required.
EDIV —E Clock Divide Rate
0 = ECLK frequency is system clock divided by 8.
1 = ECLK frequency is system clock divided by 16.
ECLK is an external M6800 bus clock available on pin ADDR23. Refer to 3.5 Chip Selects for more in-
formation.
SLIMP —Limp Mode Flag
0 = External crystal is VCO reference.
1 = Loss of crystal reference.
When the on-chip synthesizer is used, loss of reference frequency causes SLIMP to be set. The VCO
continues to run using the base control voltage. Maximum limp frequency is maximum specified system
clock frequency. X-bit state affects limp frequency.
SLOCK —Synthesizer Lock Flag
0 = VCO is enabled, but has not locked.
1 = VCO has locked on the desired frequency (or system clock is external).
The MCU maintains reset state until the synthesizer locks, but SLOCK does not indicate synthesizer
lock status until after the user writes to SYNCR.
RSTEN —Reset Enable
0 = Loss of crystal causes the MCU to operate in limp mode.
1 = Loss of crystal causes system reset.
STSIM —Stop Mode SIM Clock
0 = When LPSTOP is executed, the SIM clock is driven from the crystal oscillator and the VCO is
turned off to conserve power.
1 = When LPSTOP is executed, the SIM clock is driven from the VCO.
STEXT —Stop Mode External Clock
0 = When LPSTOP is executed, the CLKOUT signal is held negated to conserve power.
1 = When LPSTOP is executed, the CLKOUT signal is driven from the SIM clock, as determined by
the state of the STSIM bit.
3.4 External Bus Interface
The external bus interface (EBI) transfers information between the internal MCU bus and external de-
vices. The external bus has 24 address lines and 16 data lines.
The EBI provides dynamic sizing between 8-bit and 16-bit data accesses. It supports byte, word, and
long-word transfers. Ports are accessed through the use of asynchronous cycles controlled by the data
transfer (SIZ1 and SIZ0) and data size acknowledge pins (DSACK1 and DSACK0). Multiple bus cycles
may be required for a transfer to or from an 8-bit port.
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 |
|---|---|
| VE-26X-CU | CONVERTER MOD DC/DC 5.2V 200W |
| VI-21H-CV-S | CONVERTER MOD DC/DC 52V 150W |
| VI-21F-CV-S | CONVERTER MOD DC/DC 72V 150W |
| VE-26W-CU | CONVERTER MOD DC/DC 5.5V 200W |
| MC9S12XEP100CAG | IC MCU 16BIT 1M FLASH 144-LQFP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MC68331CEH20 | 制造商:Freescale Semiconductor 功能描述:32-Bit Microcontroller IC |
| MC68331CEH25 | 功能描述:32位微控制器 - MCU 32B MCU GPT SIM QSM RoHS:否 制造商:Texas Instruments 核心:C28x 处理器系列:TMS320F28x 数据总线宽度:32 bit 最大时钟频率:90 MHz 程序存储器大小:64 KB 数据 RAM 大小:26 KB 片上 ADC:Yes 工作电源电压:2.97 V to 3.63 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:LQFP-80 安装风格:SMD/SMT |
| MC68331CEH25 | 制造商:Freescale Semiconductor 功能描述:32-Bit Microcontroller IC |
| MC68331CFC16 | 功能描述:IC MCU 32BIT 16MHZ 132-PQFP RoHS:否 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:M683xx 其它有关文件:STM32F101T8 View All Specifications 特色产品:STM32 32-bit Cortex MCUs 标准包装:490 系列:STM32 F1 核心处理器:ARM? Cortex?-M3 芯体尺寸:32-位 速度:36MHz 连通性:I²C，IrDA，LIN，SPI，UART/USART 外围设备:DMA，PDR，POR，PVD，PWM，温度传感器，WDT 输入/输出数:26 程序存储器容量:64KB（64K x 8） 程序存储器类型:闪存 EEPROM 大小:- RAM 容量:10K x 8 电压 - 电源 (Vcc/Vdd):2 V ~ 3.6 V 数据转换器:A/D 10x12b 振荡器型:内部 工作温度:-40°C ~ 85°C 封装/外壳:36-VFQFN，36-VFQFPN 包装:托盘 配用:497-10030-ND - STARTER KIT FOR STM32497-8853-ND - BOARD DEMO STM32 UNIV USB-UUSCIKSDKSTM32-PL-ND - KIT IAR KICKSTART STM32 CORTEXM3497-8512-ND - KIT STARTER FOR STM32F10XE MCU497-8505-ND - KIT STARTER FOR STM32F10XE MCU497-8304-ND - KIT STM32 MOTOR DRIVER BLDC497-6438-ND - BOARD EVALUTION FOR STM32 512K497-6289-ND - KIT PERFORMANCE STICK FOR STM32MCBSTM32UME-ND - BOARD EVAL MCBSTM32 + ULINK-MEMCBSTM32U-ND - BOARD EVAL MCBSTM32 + ULINK2更多... 其它名称:497-9032STM32F101T8U6-ND |
| MC68331CFC16B1 | 功能描述:IC MCU 32BIT 16MHZ 132-PQFP RoHS:否 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:M683xx 其它有关文件:STM32F101T8 View All Specifications 特色产品:STM32 32-bit Cortex MCUs 标准包装:490 系列:STM32 F1 核心处理器:ARM? Cortex?-M3 芯体尺寸:32-位 速度:36MHz 连通性:I²C，IrDA，LIN，SPI，UART/USART 外围设备:DMA，PDR，POR，PVD，PWM，温度传感器，WDT 输入/输出数:26 程序存储器容量:64KB（64K x 8） 程序存储器类型:闪存 EEPROM 大小:- RAM 容量:10K x 8 电压 - 电源 (Vcc/Vdd):2 V ~ 3.6 V 数据转换器:A/D 10x12b 振荡器型:内部 工作温度:-40°C ~ 85°C 封装/外壳:36-VFQFN，36-VFQFPN 包装:托盘 配用:497-10030-ND - STARTER KIT FOR STM32497-8853-ND - BOARD DEMO STM32 UNIV USB-UUSCIKSDKSTM32-PL-ND - KIT IAR KICKSTART STM32 CORTEXM3497-8512-ND - KIT STARTER FOR STM32F10XE MCU497-8505-ND - KIT STARTER FOR STM32F10XE MCU497-8304-ND - KIT STM32 MOTOR DRIVER BLDC497-6438-ND - BOARD EVALUTION FOR STM32 512K497-6289-ND - KIT PERFORMANCE STICK FOR STM32MCBSTM32UME-ND - BOARD EVAL MCBSTM32 + ULINK-MEMCBSTM32U-ND - BOARD EVAL MCBSTM32 + ULINK2更多... 其它名称:497-9032STM32F101T8U6-ND |
发布紧急采购，3分钟左右您将得到回复。