参数资料
型号: MC68332VFC20
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: 39/109页
文件大小: 787K
代理商: MC68332VFC20
MC68332
MOTOROLA
MC68332TS/D
35
DSACK — Data and Size Acknowledge
This field specifies the source of DSACK in asynchronous mode. It also allows the user to adjust bus
timing with internal DSACK generation by controlling the number of wait states that are inserted to op-
timize bus speed in a particular application. The following table shows the DSACK field encoding. The
fast termination encoding (1110) is used for two-cycle access to external memory.
SPACE — Address Space
Use this option field to select an address space for the chip-select logic. The CPU32 normally operates
in supervisor or user space, but interrupt acknowledge cycles must take place in CPU space.
IPL — Interrupt Priority Level
If the space field is set for CPU space (00), chip-select logic can be used for interrupt acknowledge.
During an interrupt acknowledge cycle, the priority level on address lines ADDR[3:1] is compared to the
value in the IPL field. If the values are the same, a chip select is asserted, provided that other option
register conditions are met. The following table shows IPL field encoding.
This field only affects the response of chip selects and does not affect interrupt recognition by the CPU.
Any level means that chip select is asserted regardless of the level of the interrupt acknowledge cycle.
DSACK
Description
0000
No Wait States
0001
1 Wait State
0010
2 Wait States
0011
3 Wait States
0100
4 Wait States
0101
5 Wait States
0110
6 Wait States
0111
7 Wait States
1000
8 Wait States
1001
9 Wait States
1010
10 Wait States
1011
11 Wait States
1100
12 Wait States
1101
13 Wait States
1110
Fast Termination
1111
External DSACK
Space Field
Address Space
00
CPU Space
01
User Space
10
Supervisor Space
11
Supervisor/User Space
IPL
Description
000
Any Level
001
IPL1
010
IPL2
011
IPL3
100
IPL4
101
IPL5
110
IPL6
111
IPL7
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
M30302MCP-XXXGP 16-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP100
M30302MEP-XXXFP 16-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP100
MPC8378ECVRAGDA 32-BIT, 266 MHz, MICROPROCESSOR, PBGA689
MB90587CPMC MICROCONTROLLER, PQFP100
MB95F212HPH-G-SNE2 MICROCONTROLLER, PDIP8
相关代理商/技术参数
参数描述
MC68332VFV16 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:32-Bit Modular Microcontroller
MC68332VFV20 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:32-Bit Modular Microcontroller
MC68334 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Technical Supplement
MC68334GCEH16 功能描述:IC MCU 16MHZ 2K RAM 132-PQFP RoHS:是 类别:集成电路 (IC) >> 嵌入式 - 微控制器, 系列:M683xx 标准包装:1 系列:87C 核心处理器:MCS 51 芯体尺寸:8-位 速度:16MHz 连通性:SIO 外围设备:- 输入/输出数:32 程序存储器容量:8KB(8K x 8) 程序存储器类型:OTP EEPROM 大小:- RAM 容量:256 x 8 电压 - 电源 (Vcc/Vdd):4 V ~ 6 V 数据转换器:- 振荡器型:外部 工作温度:0°C ~ 70°C 封装/外壳:44-DIP 包装:管件 其它名称:864285
MC68334GCEH16 制造商:Freescale Semiconductor 功能描述:Microcontroller