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): 36/145頁
文件大?。?/td> 829K
代理商: EC000UM
MOTOROLA
EC000 CORE PROCESSOR USER’S MANUAL
7-1
SECTION 7
ELECTRICAL CHARACTERISTICS
This section provides information on the maximum ratings for the SCM68000 (EC000
core)1.
7.1 MAXIMUM RATINGS
7.2 CMOS CONSIDERATIONS
Because the basic CMOS cell is composed of two complementary transistors, a virtual semi-
conductor controlled rectifier (SCR) may be formed when an input exceeds the supply volt-
age. The SCR that is formed by this high input causes the device to become latched in a
mode that may result in excessive current drain and eventual destruction of the device.
Although the SCM68000 is implemented with input protection diodes, care should be exer-
cised to ensure that the maximum input voltage specification is not exceeded. Some sys-
tems may require that the CMOS circuitry be isolated from voltage transients; other may
require additional circuitry.
7.3 POWER CONSUMPTION
7.4 AC ELECTRICAL SPECIFICATION DEFINITIONS
The AC specifications presented consist of output delays, input setup and hold times, and
signal skew times. All signals are specified relative to an appropriate edge of the clock and
possibly to one or more other signals.
1. The SCM68000 is the name of the Verilog model for the EC000 core. The remainder of this section will refer
to the part as only the SCM68000.
Rating
Symbol
Value
Unit
Supply Voltage
VCC
–0.3 to 7.0
V
Input Voltage
Vin
–0.3 to 7.0
V
Maximum Operating Temperature
Range
TA
TL to TH
–40 to100
°C
Storage Temperature
Tstg
–55 to 150
°C
Characteristic
3.3 V
5 V
Unit
Typical
Max
Typical
Max
Operating Current @16 MHz
15
30
25
50
mA
Standby Current
TBD
mA
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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