- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄97874 > EC000UM EC000 Core User＇s Manual (SCM68000) PDF資料下載
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)： | 77/145頁 |
| 文件大?。?/td> | 829K |
| 代理商： | EC000UM |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁當前第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁第107頁第108頁第109頁第110頁第111頁第112頁第113頁第114頁第115頁第116頁第117頁第118頁第119頁第120頁第121頁第122頁第123頁第124頁第125頁第126頁第127頁第128頁第129頁第130頁第131頁第132頁第133頁第134頁第135頁第136頁第137頁第138頁第139頁第140頁第141頁第142頁第143頁第144頁第145頁
Signal Description
2-8
EC000 CORE PROCESSOR USER’S MANUAL
MOTOROLA
2.7.8 Autovector (AVECB)
This active-low input signal indicates that the SCM68000 should use automatic vectoring for
an interrupt during an interrupt acknowledge cycle. AVECB should be asserted only during
an interrupt acknowledge cycle or erratic controller operation may occur.
2.8 THREE-STATE CONTROL
The following signals are the enable signals to put SCM68000 signals into a high-impedence
state.
2.8.1 Address Output Enable (AOEB)
This active-low output signal is negated to put the address lines (A31–A0), function codes
(FC2–FC0), size codes (SIZ1–SIZ0), early read/write (ERWB), and read/write (RWB) into a
high-impedance state.
2.8.2 Control Output Enable (COEB)
This active-low output signal is negated to put the address strobe (ASB), data strobe (DSB),
lower data strobe (LDSB), read-modify-write (RMCB), and upper data strobe (UDSB) into a
high-impedance state.
2.8.3 Data Output Enable (DOEB)
This active-low output signal is negated to put the data lines of the SCM68000 into a high-
impedance state.
2.9 PROCESSOR STATUS
These signals are used to indicate pending interrupts and when the SCM68000 is between
bus cycles or at instruction boundaries. They also show when the instruction pipe is refilling
and when the processor has been stopped. The signals are described in the following para-
graphs.
2.9.1 Function Codes (FC2–FC0)
These active-high, three-state function code outputs indicate the mode (user or supervisor)
and the address space currently being accessed as listed in Table 2-6. The function code
outputs are valid whenever ASB is active.
Table 2-6. Function Code Outputs
Function Code Output
Cycle Time
FC2
FC1
FC0
Low
(Undefined, Reserved)
Low
High
User Data
Low
High
Low
User Program
Low
High
(Undefined, Reserved)
High
Low
(Undefined, Reserved)
High
Low
High
Supervisor Data
High
Low
Supervisor Program
High
Interrupt Acknowledge
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
..
.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| EC103B | Sensitive SCRs |
| EC103B1 | Sensitive SCRs |
| EC103B2 | Sensitive SCRs |
| EC103B3 | Sensitive SCRs |
| EC103D175 | Thyristor Product Catalog |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| EC0010-000 | 制造商:TE Connectivity 功能描述:EC0010-000 |
| EC001031 | 制造商:PHOENIX 制造商全稱:PHOENIX CONTACT 功能描述:Header, Nominal current: 12 A, Rated voltage (III/2): 320 V, Assembly: Soldering |
| EC001121 | 制造商:PHOENIX 制造商全稱:PHOENIX CONTACT 功能描述:Plug component, Nominal current: 12 A, Rated voltage (III/2): 320 V, Number of positions: 4, Pitch: 5mm, Connection method: Screw connection, Color: Black, Contact surface: Tin |
| EC001283 | 制造商:PHOENIX 制造商全稱:PHOENIX CONTACT 功能描述:Plug component, Nominal current: 12 A, Rated voltage (III/2): 320 V, Number of positions: 7, Pitch: 5.08 mm, Connection method: Solder/Slip-on connection, Color: green, Contact surface: Tin, Assembly: Direct mounting |
| EC0013-000 | 制造商:TE Connectivity 功能描述:EC0013-000 |
發(fā)布緊急采購，3分鐘左右您將得到回復。