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| 型号： | MC68332GCFC20B1 |
| 厂商： | FREESCALE SEMICONDUCTOR INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 32-BIT, 20 MHz, MICROCONTROLLER, PQFP132 |
| 封装： | 0.950 X 0.950 INCH, 0.025 INCH PITCH, PLASTIC, QFP-132 |
| 文件页数： | 31/109页 |
| 文件大小： | 787K |
| 代理商： | MC68332GCFC20B1 |
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MOTOROLA
MC68332
28
MC68332TS/D
3.4.8 Data Transfer Mechanism
The MCU architecture supports byte, word, and long-word operands, allowing access to 8- and 16-bit
data ports through the use of asynchronous cycles controlled by the data transfer and size acknowledge
inputs (DSACK1 and DSACK0).
3.4.9 Dynamic Bus Sizing
The MCU dynamically interprets the port size of the addressed device during each bus cycle, allowing
operand transfers to or from 8- and 16-bit ports. During an operand transfer cycle, the slave device sig-
nals its port size and indicates completion of the bus cycle to the MCU through the use of the DSACK0
and DSACK1 inputs, as shown in the following table.
For example, if the MCU is executing an instruction that reads a long-word operand from a 16-bit port,
the MCU latches the 16 bits of valid data and then runs another bus cycle to obtain the other 16 bits.
The operation for an 8-bit port is similar, but requires four read cycles. The addressed device uses the
DSACK0 and DSACK1 signals to indicate the port width. For instance, a 16-bit device always returns
DSACK0 = 1 and DSACK1 = 0 for a 16-bit port, regardless of whether the bus cycle is a byte or word
operation.
Dynamic bus sizing requires that the portion of the data bus used for a transfer to or from a particular
port size be fixed. A 16-bit port must reside on data bus bits [15:0] and an 8-bit port must reside on data
bus bits [15:8]. This minimizes the number of bus cycles needed to transfer data and ensures that the
MCU transfers valid data.
The MCU always attempts to transfer the maximum amount of data on all bus cycles. For a word oper-
ation, it is assumed that the port is 16 bits wide when the bus cycle begins. Operand bytes are desig-
nated as shown in the following figure. OP0 is the most significant byte of a long-word operand, and
OP3 is the least significant byte. The two bytes of a word-length operand are OP0 (most significant) and
OP1. The single byte of a byte-length operand is OP0.
Figure 8 Operand Byte Order
3.4.10 Operand Alignment
The data multiplexer establishes the necessary connections for different combinations of address and
data sizes. The multiplexer takes the two bytes of the 16-bit bus and routes them to their required po-
sitions. Positioning of bytes is determined by the size and address outputs. SIZ1 and SIZ0 indicate the
remaining number of bytes to be transferred during the current bus cycle. The number of bytes trans-
ferred is equal to or less than the size indicated by SIZ1 and SIZ0, depending on port width.
Table 10 Effect of DSACK Signals
DSACK1
DSACK0
Result
1
Insert Wait States in Current Bus Cycle
1
0
Complete Cycle —Data Bus Port Size is 8 Bits
0
1
Complete Cycle —Data Bus Port Size is 16 Bits
0
Reserved
Operand
Byte Order
31
24
23
16
15
8
7
0
Long Word
OP0
OP1
OP2
OP3
Three Byte
OP0
OP1
OP2
Word
OP0
OP1
Byte
OP0
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Freescale Semiconductor, Inc.
For More Information On This Product,
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| MC68332GCFV20 | 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:32-Bit Modular Microcontroller |
| MC68332GCFVV16 | 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:32-Bit Modular Microcontroller |
| MC68332GCPV16 | 功能描述:IC MCU 32BIT 16MHZ GMASK 144LQFP 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 |
| MC68332GCPV16B1 | 功能描述:IC MCU 32BIT 16MHZ 144-LQFP RoHS:否 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:M683xx 标准包装:250 系列:56F8xxx 核心处理器:56800E 芯体尺寸:16-位 速度:60MHz 连通性:CAN，SCI，SPI 外围设备:POR，PWM，温度传感器，WDT 输入/输出数:21 程序存储器容量:40KB（20K x 16） 程序存储器类型:闪存 EEPROM 大小:- RAM 容量:6K x 16 电压 - 电源 (Vcc/Vdd):2.25 V ~ 3.6 V 数据转换器:A/D 6x12b 振荡器型:内部 工作温度:-40°C ~ 125°C 封装/外壳:48-LQFP 包装:托盘 配用:MC56F8323EVME-ND - BOARD EVALUATION MC56F8323 |
| MC68332GCPV20 | 功能描述:IC MCU 32BIT 20MHZ GMASK 144LQFP 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 |
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