- 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)： | 129/145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頁當前第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
Bus Operation
MOTOROLA
EC000 CORE PROCESSOR USER’S MANUAL
3-43
The negation of BERRB and HALTIB under several conditions is shown in Table 3-2.
DTACKB is assumed to be negated normally in all cases. For reliable operation, both
DTACKB and BERRB should be negated when address strobe is negated.
Table 3-2 shows when BERRB and HALTIB should be negated with respect to when they
were asserted to produce various results. The first column describes which case in Table 3-
1 is being used for asserting the signals. The third column shows the current bus state and
the fourth column shows the following bus state. The last column describes what will happen
in the next bus cycle given the conditions described in the previous columns.
Table 3-1. DTACKB, BERRB, and HALTIB Assertion Results
Case
No.
Control
Signal Input
Asserted on
Rising Edge of
State
*
Result
N
N+2
1
DTACKB
BERRB
HALTIB
A
NA
S
X
Normal cycle terminate and continue.
2
DTACKB
BERRB
HALTIB
A
NA
A/S
S
X
S
Normal cycle terminate and halt. Continue
when HALTIB negated.
3
DTACKB
BERRB
HALTIB
X
A
NA
X
S
NA
Terminate and take bus error trap.
4
DTACKB
BERRB
HALTIB
NA
A
NA
X
S
A
Terminate and retry when HALTIB negated.
5
DTACKB
BERRB
HALTIB
X
A
X
S
Terminate and retry when HALTIB negated.
6
DTACKB
BERRB
HALTIB
NA
A
X
A
S
Terminate and retry when HALTIB negated.
LEGEND:
N — The number of the current even bus state (e.g., S4, S6, etc.)
A — Signal asserted in this bus state
NA — Signal not asserted in this bus state
X — Don't care
S — Signal asserted in preceding bus state and remains asserted in this state
*The DTACKB, BERRB, and HALTIB signals are subject to the setup and hold time (spec
#47, defined in Section 7 Electrical Characteristics) before they are sampled on the
falling edge of the previous state. “Asserted” in this table refers to the time when the sig-
nals are valid internally. See 3.5 Asynchronous Operation for more details on external
asynchronous signal synchronization.
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。