Datasheet
Table Of Contents
- FEATURES
- DETAILED DESCRIPTION
- ORDERING INFORMATION
- Figure 1. Block Diagram
- PIN DESCRIPTION
- 80C32 COMPATIBILITY
- Figure 2. Comparative Timing of the DS80C320/DS80C323 and 80C32
- HIGH-SPEED OPERATION
- INSTRUCTION SET SUMMARY
- Table 1. Instruction Set Summary
- SPEED ADVANTAGE SUMMARY
- MEMORY ACCESS
- Figure 3. Typical Memory Connection
- STRETCH MEMORY CYCLE
- Table 2. Data Memory Cycle Stretch Values
- DUAL DATA POINTER
- 64-Byte Block Move without Dual Data Pointer
- 64-Byte Block Move with Dual Data Pointer
- PERIPHERAL OVERVIEW
- SERIAL PORTS
- TIMER-RATE CONTROL
- POWER-FAIL RESET
- POWER-FAIL INTERRUPT
- WATCHDOG TIMER
- Table 3. Watchdog Timeout Values
- INTERRUPTS
- Table 4. Interrupt Priority
- POWER MANAGEMENT
- IDLE MODE ENHANCEMENTS
- STOP MODE ENHANCEMENTS
- Figure 4. Ring Oscillator Startup
- TIMED ACCESS PROTECTION
- SPECIAL-FUNCTION REGISTERS
- Table 5. Special-Function Register Locations
- ELECTRICAL SPECIFICATIONS
- ABSOLUTE MAXIMUM RATINGS
- DC ELECTRICAL CHARACTERISTICS—DS80C320
- NOTES FOR DS80C320 DC ELECTRICAL CHARACTERISTICS
- TYPICAL ICC vs. FREQUENCY
- AC CHARACTERISTICS—DS80C320
- NOTES FOR DS80C320 AC ELECTRICAL CHARACTERISTICS
- MOVX CHARACTERISTICS—DS80C320
- DC ELECTRICAL CHARACTERISTICS—DS80C323
- NOTES FOR DS80C323 DC ELECTRICAL CHARACTERISTICS
- NOTES FOR DS80C323 DC ELECTRICAL CHARACTERISTICS (continued)
- AC ELECTRICAL CHARACTERISTICS—DS80C323
- NOTES FOR DS80C323 AC ELECTRICAL CHARACTERISTICS
- MOVX CHARACTERISTICS—DS80C323
- EXTERNAL CLOCK CHARACTERISTICS
- SERIAL PORT MODE 0 TIMING CHARACTERISTICS
- EXPLANATION OF AC SYMBOLS
- POWER-CYCLE TIMING CHARACTERISTICS
- NOTES FOR POWER CYCLE TIMING CHARACTERISTICS
- PROGRAM MEMORY READ CYCLE
- DATA MEMORY READ CYCLE
- DATA MEMORY WRITE CYCLE
- DATA MEMORY WRITE WITH STRETCH = 1
- DATA MEMORY WRITE WITH STRETCH = 2
- EXTERNAL CLOCK DRIVE
- SERIAL PORT MODE 0 TIMING
- POWER-CYCLE TIMING
- DATA SHEET REVISION SUMMARY
DS80C320/DS80C323 High-Speed/Low-Power Microcontrollers
27 of 38
AC ELECTRICAL CHARACTERISTICS—DS80C323
18 MHz VARIABLE CLOCK
PARAMETER SYMBOL
MIN MAX MIN MAX
UNITS
External
Oscillator
0 18 0 18
Oscillator
Frequency
External
Crystal
1/t
CLCL
1 18 1 18
MHz
ALE Pulse Width t
LHLL
68 1.5t
CLCL
-15 ns
Port 0 Address Valid
to ALE Low
t
AVLL
16 0.5t
CLCL
-11 ns
Address Hold After
ALE Low
t
LLAX1
6 (Note 5) 0.25t
CLCL
-8 (Note 5) ns
Address Hold After
ALE Low for MOVX
WR
t
LLAX2
14 0.5t
CLCL
-13 ns
ALE Low to Valid
Instruction In
t
LLIV
93 2.5t
CLCL
-46 ns
ALE Low to PSEN Low
t
LLPL
4 0.25t
CLCL
-10 ns
PSEN Pulse Width
t
PLPH
118 2.25t
CLCL
-7 ns
PSEN Low to Valid
Instruction In
t
PLIV
87 2.25t
CLCL
-38 ns
Input Instruction Hold
After
PSEN
t
PXIX
0 0 ns
Input Instruction Float
After
PSEN
t
PXIZ
51 t
CLCL
-5 ns
Port 0 Address to Valid
Instruction In
t
AVIV1
128 3t
CLCL
-39 ns
Port 2 Address to Valid
Instruction In
t
AVIV2
139 3.5t
CLCL
-56 ns
PSEN
Low to Address Float
t
PLAZ
(Note 5) (Note 5) ns
NOTES FOR DS80C323 AC ELECTRICAL CHARACTERISTICS
All parameters apply to both commercial and industrial temperature operation unless otherwise noted. Specifications to -40°C
are guaranteed by design and are not production tested. AC electrical characteristics assume 50% duty cycle for the oscillator,
oscillator frequency > 16MHz, and are not 100% production tested, but are guaranteed by design.
1. All signals rated over operating temperature at 18MHz.
2. All signals characterized with load capacitance of 80pF except Port 0, ALE,
PSEN , RD , and WR at 100pF.
Note that loading should be approximately equal for valid timing.
3. Interfacing to memory devices with float times (turn off times) over 35ns may cause contention. This will not
damage the parts, but will cause an increase in operating current.
4. Specifications assume a 50% duty cycle for the oscillator. Port 2 timing will change with the duty cycle
variations.
5. Address is held in a weak latch until over-driven by external memory.