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PDF LH77790B Data sheet ( Hoja de datos )
| Número de pieza | LH77790B | |
| Descripción | Embedded Microcontroller Thermal & Electrical Specification | |
| Fabricantes | Sharp Electrionic | |
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LH77790B
Embedded
Microcontroller
Thermal & Electrical
Specification
Version 1.0
®
1 page  
• Flexible Memory Interface
– Six Multiplexeled Chip Enables/CAS pins
– Two RAS pins
– Fully Programmable
– Six SRAM Banks (64MB each)
– Two DRAM Banks (128MB each)
– Access Privileges (System/User)
• On-Chip DRAM Controller
– Fast Page Mode
– Normal Mode
– CAS before RAS Refresh
• Programmable Peripheral Interface (PPI)
– 24 Programmable I/O Signals
– Three Modes of Operation
• Three 16-Bit Counter/Timer Channels
– Six Modes of Operation
– Binary or BCD Counting
• Hardware Watchdog Timer
– Eight Time-out Intervals
– Protection Mechanism
– Three Time-out Actions
• Little Endian
• JTAG Interface
• Dual Supply Voltage
– 5 V TTL - 25 MHz
– 3.3 V LVTTL - 16.7 MHz
LH77790B
Development Environment
The 790B Evaluation Board (part number LU7790AH2A) and the ARM Software Develop-
ment ToolKit (part number LU7V211H1) give users full access to the power and features
of the 790B and provide a complete integrated environment for development. Users will be
able to develop, benchmark, and profile both hardware and software easily and quickly.
Thermal & Electrical Specification
3
5 Page 
LH77790B
Absolute Maximum Ratings
Table 3. Absolute Maximum Ratings
PARAMETER
Supply Voltage
Input Voltage
Output Voltage
Storage Temperature
Power Dissipation (Package Limit)
SYMBOL
VCC
VIN
VOUT
TSTG
PDPKG
RATING
-0.3 to 6.0
-0.3 to VCC + 0.3
-0.3 to VCC + 0.3
-40 to +125
1
UNIT
V
V
V
°C
W
NOTE: These are stress ratings for transient conditions only. Operation at or beyond absolute
maximum rating conditions may affect reliability and cause permanent damage to the device.
Recommended Operating Conditions
Table 4. LH77790B (5 V Operation) Recommended Operating Conditions
PARAMETER
Supply Voltage
Supply Voltage
Clock Frequency
Operating Temperature
SYMBOL
VCC
VSS
FXCLK
TOPR
MIN.
4.5
0
0
0
TYP.
5.0
0
—
—
MAX.
5.5
0
25
70
UNIT
V
V
MHz
°C
NOTE: Unused input pins should be pulled LOW or HIGH to their inactive state.
Table 5. LH77790B (3.3 V Operation) Recommended Operating Conditions
PARAMETER
Supply Voltage
Supply Voltage
Clock Frequency
Operating Temperature
SYMBOL
VCC
VSS
FXCLK
TOPR
MIN.
3.0
0
0
0
TYP.
3.3
0
—
—
MAX.
3.6
0
16.7
70
UNIT
V
V
MHz
°C
NOTE: Unused input pins should be pulled LOW or HIGH to their inactive state.
Thermal & Electrical Specification
9
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet LH77790B.PDF ] | |
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