Basictiming TimingDiagram, 294 | Oki MSM80C154S, MSM83C154S instruction

CYCLE

M1

M1

M2

M1

Basictiming

TimingDiagram

MSM80C154S/83C154S

STEP

S1

S2

S3

S4

S5

S6

S1

S2

S3

S4

S5

S6

S1

S2

S3

S4

S5

S6

S1

S2

S3

S4

S5

S6

XTAL 1

1

0

ALE

1

0

294

1

PSEN

0

RD/WR

1

0

DPL&Rr

1

PORT-0

PCL

PCL

PCL

ACC & RAM

PCL

PCL

PCL

0

PORT-2

1

PCH

PCH

PCH

PCH

DPH & PORT DATA

PCH

PCH

PCH

0

DATA STABLE

DATA STABLE

1

CPU¬PORT 0

PORT¬CPU

1

PORT OLD DATA

PORT NEW DATA

0

Instruction decoding

Instruction decoding

Instruction decoding

Instruction execution

Instruction execution

Instruction execution

PC+1

PC+1

PC+1

PC+1

PC+1

TM+1

TM+1

TM+1

TM+1

¡

External data memory instruction

Semiconductor

Port output/input

execution

Port output/input

instruction execution

instruction execution

Image 36

Oki MSM80C154S, MSM83C154S manual Basictiming TimingDiagram, 294

Contents

Features General Description¡SemiconductorSemiconductor MSM80C154S/83C154S Cmos 8-bit Microcontroller MSM80C154S/83C154S ¡ Semiconductor Signal TIMER/COUNTER 0 Interrupt2PORT Address Decoder PIN Configuration TOP View Pin Plastic DIPPsen Reset Pin Plastic QFP44 P1.4 P1.5 P1.6 P1.7 25 P2.7 24 P2.6 23 P2.5 P2.4 Pin Plastic Tqfp Pin Plastic QFJ 35 EA P3.0/RXD 34 NC 33 ALE P3.1/TXDXTAL1 XTAL2 19 P3.7/RD 18 P3.6/WR PIN Descriptions MSM80C154S/83C154S¡ SemiconductorALE ¡ SemiconductorMSM80C154S/83C154S XTAL1XTAL2 Diagram of Special Function Registers Registers Special Function Registers Timer mode register Tmod Gate Power control register Pcon Interrupt signalCPU is reset Timer control register Tcon Interrupt request flag for external interruptTcon TR1 TF0 TR0 IE1 IT1 IE0 IT0 Serial port control register Scon RENMode Interrupt enable register IE Interrupt control bit for serial portReserved bit. The output data is 1 if the bit is read Overall interrupt control bit Priority is assigned when bit is Interrupt priority register IPPriority interrupt circuit control bit PCT PT2 PT1 PX1 PT0 PX0 Bank When this bit is set to Control register IoconIZC Received at a serial port Timer 2 control register T2CON Memory Maps Program Area HEX 0FF Addressingindirectregister BIT RAMBANK3 BANK2 MSM80C154S/83C154S Diagram of Internal Data Memory RAM 0FFH2FH 0FH Absolute Maximum Ratings Recommended Operating Conditions Electrical Characteristics DC CharacteristicsPort 0, ALE, Psen Maximum power supply current normal operation ICC mA Maximum power supply current idle mode ICC mA Output High Voltage Port 1, 2 Logical 0 Input Current VI=0.1 Logical 1 Output CurrentVO=0.1 Port 1, 2 Logical 1 to 0 Transition 285 Measuring circuits InputOutput ALE Signal Width Address Setup TimeFalling Edge Psen Signal Width To ALE Falling Edge Address Hold Time External program memory read cycle PORT0Instr 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 AC Characteristics Measuring Conditions External Oscillator SignalXTAL1 external clock input waveform conditions External Clock Drive Waveform Basictiming TimingDiagram 294