参数资料
型号: MC68334GCFC20
厂商: MOTOROLA 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: PLASTIC, QFP-132
文件页数: 28/76页
文件大小: 444K
代理商: MC68334GCFC20
MOTOROLA
MC68334
34
MC68334TS/D REV. 1
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.
AVEC — Autovector Enable
0 = External interrupt vector enabled
1 = Autovector enabled
This field selects one of two methods of acquiring an interrupt vector number during an external 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
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
相关PDF资料
PDF描述
MC68334MFC20 32-BIT, 20 MHz, MICROCONTROLLER, PQFP132
MC68334VFC20 32-BIT, 20 MHz, MICROCONTROLLER, PQFP132
MC68334AVFC20 32-BIT, 20 MHz, MICROCONTROLLER, PQFP132
MC68334VFC16 32-BIT, 16 MHz, MICROCONTROLLER, PQFP132
MC68336AMFT20 32-BIT, 20.97 MHz, MICROCONTROLLER, PQFP16
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