NEC PD75P308 AC Characteristics Ta = -10 to + 70C, VDD = 5V ±5%, Interrupt mode register IM0

Page 19

μPD75P308

AC CHARACTERISTICS (Ta = -10 to + 70°C, VDD = 5V ±5%)

Operation Other Than Serial Transfer

Parameter

Symbol

Conditions

MIN.

TYP.

MAX.

Unit

CPU Clock Cycle Time*1

w/main system clock

0.95

64

μs

(Minimum Instruction

Execution Time

tCY

w/subsystem clock

114

122

125

μs

= 1 Machine Cycle)

TI0 Input Frequency

fTI

0

1

MHz

TI0 Input High-, Low-Level

tTIH, tTIL

0.48

μs

Widths

Interrupt Input High-, Low-Level

tINTH,

INT0

*2

μs

tINTL

Widths

KR0-7, INT1, 2, 4

10

μs

Low-Level Width

tRSL

10

μs

RESET

t cy vs VDD

70

(with main system clock)

* 1: The CPU clock (Φ) cycle time is determined

by the oscillation frequency of the connected

64

60

oscillator, system clock control register

6

(SCC), and processor clock control register

(PCC).

5

The figure on the right is cycle time tCY vs.

4

supply voltage VDD characteristics at the

s]

main system clock.

μ[

3

cy

2: 2tCY or 128/fXX depending on the setting of

t

time

the interrupt mode register (IM0).

2

Cycle

1

0.5

0

1

2

3

4

5

6

Supply voltage V

[V]

DD

19

Image 19

Contents Quality Grade FeaturesDescription Ordering InformationΜPD75P308 PIN ConfigurationBlock Diagram Contents PIN Functions Port PinsNON Port Pins PIN INPUT/OUTPUT Circuits Schmitt trigger input with hysteresis characteristicsInput buffer of Cmos standard Type F-B COMIN/OUT SEG Type M-C Connect capacitor between VDD and P00/INT4, Reset pinEprom Differences Between μPD75P308 and μPD75308Operation Modes for WRITING/VERIFYING Program Memory Program memory address 0 clear mode+12.5 Write mode Verify mode Program inhibit mode Or H Writing and Verifying Prom Program MemoryVDD+1 Program Memory Write ProcedureProgram Memory Read Procedure Erasure μPD75P308K only Absolute Maximum Ratings Ta = 25C Electrical SpecificationsMain System Clock Ceramic Oscillator Ta = -10 to +70C Main System Clock Oscillator Circuit CharacteristicsTa = -10 to +70C, VDD = 5 to ±5 Recommended Oscillation Circuit ConstantsCapacitance Ta = 25C, VDD = 0 DC Characteristics Ta = -10 to +70C, VDD = 5V ±5% Interrupt mode register IM0 AC Characteristics Ta = -10 to + 70C, VDD = 5V ±5%Operation Other Than Serial Transfer Serial Transfer Operation SBI Mode SCK external clock output master SBI Mode SCK internal clock output masterClock Timing AC Timing Test Point excluding X1 and XT1 inputsTI0 Timing TWO-LINE Serial I/O Mode Serial Transfer Timing THREE-LINE Serial I/O ModeInterrupt Input Timing Serial Transfer Timing BUS Release Signal TransferCommand Signal Transfer Reset Input TimingTa = -10 to +70C Data Retention Timing releasing Stop mode by ResetBTM3 BTM2 BTM1 BTM0 Other than X1 or Program Memory Read Timing Program Memory Write TimingMD0 MD1 PIN Plastic QFP 14×20 Package DrawingsMillimeters Inches PIN Ceramic WqfnΜPD75P308GF-3B9 80-pin plastic QFP 14 x 20 mm Recommended Soldering ConditionsVPS Prom writing tools Appendix A. Development ToolsAppendix B. Related Documents Fix the input level of Cmos devices Processing of Unused Pins Cmos Devices onlyStatic Electricity ALL MOS Devices Status Before Initialization ALL MOS DevicesMemo