參數(shù)資料
型號： EC000UM
英文描述： EC000 Core User＇s Manual (SCM68000)
中文描述： EC000核心用戶手冊（SCM68000）
文件頁數(shù)： 107/145頁
文件大小： 829K
代理商： EC000UM
Bus Operation
MOTOROLA
EC000 CORE PROCESSOR USER’S MANUAL
3-23
Figure 3-18. Bus Arbitration Unit State Diagrams
RA
XX
RA
XX
XA
RA
RX
1
R = Bus Request Internal
A = Bus Grant Acknowledge Internal
G = Bus Grant
T = Three-State Control to Bus Control Logic
X = Don't Care
NOTES:
1. State machine will not change if
the bus is S0 or S1. Refer to
3.3 BUS ARBITRATION CONTROL
2. The address bus will be placed in
the high-impedance state if T is
asserted and ASB is negated.
R
X
R
(a) 3-Wire Bus Arbitration
(b) 2-Wire Bus Arbitration
GT
RA
XA
RA
GT
RA
GT
R+A
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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