ALE Shift Clock, Input Data | Oki MSM80C154S, MSM83C154S guide

292

MSM80C154S/83C154S

MACHINE CYCLE

ALE

SHIFT

CLOCK

OUTPUT DATA

INPUT

DATA

tXLXL

tQVXH						tXHQX

tXHDV

VALIDVALID

tXHDX

VALID

VALID

VALID

VALID

VALID

VALID

¡ Semiconductor

Image 34

Oki MSM80C154S, MSM83C154S manual ALE Shift Clock, Input Data

Contents

¡SemiconductorSemiconductor MSM80C154S/83C154S FeaturesGeneral Description Cmos 8-bit Microcontroller MSM80C154S/83C154S ¡ Semiconductor 2PORT SignalTIMER/COUNTER 0 Interrupt Address Decoder Pin Plastic DIP PIN Configuration TOP ViewPsen 44 P1.4 P1.5 P1.6 P1.7 ResetPin Plastic QFP 25 P2.7 24 P2.6 23 P2.5 P2.4 Pin Plastic Tqfp 35 EA P3.0/RXD 34 NC 33 ALE P3.1/TXD Pin Plastic QFJXTAL1 XTAL2 19 P3.7/RD 18 P3.6/WR MSM80C154S/83C154S¡ Semiconductor PIN DescriptionsALE XTAL1 ¡ SemiconductorMSM80C154S/83C154SXTAL2 Diagram of Special Function Registers Registers Special Function Registers Timer mode register Tmod Gate Interrupt signal Power control register PconCPU is reset Tcon Timer control register TconInterrupt request flag for external interrupt TR1 TF0 TR0 IE1 IT1 IE0 IT0 REN Serial port control register SconMode Reserved bit. The output data is 1 if the bit is read Interrupt enable register IEInterrupt control bit for serial port Overall interrupt control bit Priority interrupt circuit control bit Priority is assigned when bit isInterrupt priority register IP PCT PT2 PT1 PX1 PT0 PX0 Bank IZC When this bit is set toControl register Iocon Received at a serial port Timer 2 control register T2CON Memory Maps Program Area BANK3 HEX 0FF AddressingindirectregisterBIT RAM BANK2 2FH MSM80C154S/83C154S Diagram of Internal Data Memory RAM0FFH 0FH Absolute Maximum Ratings Recommended Operating Conditions DC Characteristics Electrical CharacteristicsPort 0, ALE, Psen Maximum power supply current normal operation ICC mA Maximum power supply current idle mode ICC mA Logical 0 Input Current VI=0.1 Logical 1 Output Current Output High Voltage Port 1, 2VO=0.1 Port 1, 2 Logical 1 to 0 Transition 285 Input Measuring circuitsOutput Falling Edge Psen Signal Width ALE Signal WidthAddress Setup Time To ALE Falling Edge Address Hold Time PORT0 External program memory read cycleInstr External data memory access AC characteristics External data memory read cycle External data memory write cycle Serial port I/O Extension Mode AC characteristics Parameter Symbol Min Max Unit ALE Shift Clock Input Data XTAL1 external clock input waveform conditions AC Characteristics Measuring ConditionsExternal Oscillator Signal External Clock Drive Waveform Basictiming TimingDiagram 294