Rainbow-electronics AT89LV51 Manual de usuario

4-45Features•Compatible with MCS-51™ Products•4K Bytes of Reprogrammable Flash Memory– Endurance: 1,000 Write/Erase Cycles•2.7V to 6V Operating Range•

AT89LV514-54Absolute Maximum Ratings*DC CharacteristicsTA = -40°C to 85°C, VCC = 2.7V to 6.0V (unless otherwise noted)Notes: 1. Under steady state (no

AT89LV514-55AC Characteristics Under operating conditions, load capacitance for Port 0, ALE/PROG, and PSEN = 100 pF; load capacitance for all other ou

AT89LV514-56External Program Memory Read CycleExternal Data Memory Read CycletLHLLtLLIVtPLIVtLLAXtPXIZtPLPHtPLAZtPXAVtAVLLtLLPLtAVIVtPXIXALEPSENPORT 0

AT89LV514-57External Data Memory Write CycleExternal Clock Drive WaveformsExternal Clock DriveSymbol Parameter Min Max Units1/tCLCLOscillator Frequenc

AT89LV514-58Serial Port Timing: Shift Register Mode Test Conditions(VCC = 2.7V to 6V; Load Capacitance = 80 pF)Shift Register Mode Timing WaveformsAC

AT89LV514-59Notes: 1. XTAL1 tied to GND for Icc (power down)2. Lock bits programmed AT89LV51TYPICAL ICC (ACTIVE) at 25 C048121620240 4 8 12162024F (M

AT89LV514-60Ordering InformationSpeed (MHz) Power Supply Ordering Code Package Operation Range12 2.7V to 6V AT89LV51-12ACAT89LV51-12JCAT89LV51-12PC44A

AT89LV514-46Block Diagram

AT89LV514-47The AT89LV51 provides the following standard features:4K bytes of Flash, 128 bytes of RAM, 32 I/O lines, two 16-bit timer/counters, a five

AT89LV514-48EA/VPPExternal Access Enable. EA must be strapped to GND inorder to enable the device to fetch code from external pro-gram memory location

AT89LV514-49Oscillator Characteristics XTAL1 and XTAL2 are the input and output, respectively,of an inverting amplifier which can be configured for us

AT89LV514-50Program Memory Lock Bits On the chip are three lock bits which can be left unpro-grammed (U) or can be programmed (P) to obtain the addi-t

AT89LV514-51Programming InterfaceEvery code byte in the Flash array can be written and theentire array can be erased by using the appropriate combi-na

AT89LV514-52Flash Programming and Verification Characteristics TA = 0°C to 70°C, VCC = 5.0V ± 10%Note: 1. Only used in 12-volt programming mode.Symbol

AT89LV514-53Flash Programming and Verification Waveforms (VPP = 12V)tGLGHtGHSLtAVGLtSHGLtDVGLtGHAXtAVQVtGHDXtEHSHtELQVtWCBUSYREADYtGHBLtEHQZP1.0 - P1.