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參數(shù)資料
| 型號： | AN3729 |
| 英文描述： | MA31750 - Bus arbiter |
| 中文描述： | MA31750 -總線仲裁器 |
| 文件頁數(shù)： | 3/5頁 |
| 文件大?。?/td> | 54K |
| 代理商： | AN3729 |
AN3726: MA31750 - Application Note 3
3/5
Register
R0-R15
T0-T11
A
IC
Register Description
General purpose register R0-R15
Microcode registers T0-T11
Operand or alternate address register
Instruction Counter (take great care when modifying this value)
Code (bottom 12 bits)
000-00F
010-01B
01C
01D
Table 2: Register Map
Figure 2: Console Operation Flowchart
CONREQN low
Is CONREQN low
Execute command
Specified operation is
performed.
Read command
register @ 8402
No
Disable
Processor leaves
Console Mode if a
Pending Interrupt is
asserted
Continue
Processor leaves
Console Mode
Processor waits for CONREQN
high before proceeding.
Processor exits console
mode with CONREQN high.
Pipeline is refilled and
normal execution is
resumed.
At least one 1750 instruction
is executed.
Has current
1750 instruction
finished
No
Is CONREQN low
Yes
Pending Interrupt
Yes
Yes
No
No
Yes
BPT instruction
Processor executes Console
Command immediately
Is CONREQN high
**
Yes
No
**
CONREQN is sampled during the
1st internal cycle in the console loop
Is
console present
in internal config
word
Yes
Read system
configuration word
Is
console
present
No
Continue with
normal operation
No
Yes
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