Oki MSM80C154S, MSM83C154S manual Basictiming TimingDiagram, 294

Page 36

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

Contents Features General Description¡SemiconductorSemiconductor MSM80C154S/83C154S Cmos 8-bit MicrocontrollerMSM80C154S/83C154S ¡ SemiconductorSignal TIMER/COUNTER 0 Interrupt2PORT Address DecoderPIN 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 P2.4Pin 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 RegistersSpecial Function Registers Timer mode register Tmod GatePower control register Pcon Interrupt signalCPU is reset Timer control register Tcon Interrupt request flag for external interruptTcon TR1 TF0 TR0 IE1 IT1 IE0 IT0Serial 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 bitPriority is assigned when bit is Interrupt priority register IPPriority interrupt circuit control bit PCT PT2 PT1 PX1 PT0 PX0Bank When this bit is set to Control register IoconIZC Received at a serial portTimer 2 control register T2CON Memory Maps Program AreaHEX 0FF Addressingindirectregister BIT RAMBANK3 BANK2MSM80C154S/83C154S Diagram of Internal Data Memory RAM 0FFH2FH 0FHAbsolute Maximum Ratings Recommended Operating ConditionsElectrical Characteristics DC CharacteristicsPort 0, ALE, Psen Maximum power supply current normal operation ICC mA Maximum power supply current idle mode ICC mAOutput 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 TimeExternal program memory read cycle PORT0Instr External data memory access AC characteristics External data memory read cycle External data memory write cycleSerial port I/O Extension Mode AC characteristics Parameter Symbol Min Max UnitALE Shift Clock Input DataAC Characteristics Measuring Conditions External Oscillator SignalXTAL1 external clock input waveform conditions External Clock Drive WaveformBasictiming TimingDiagram 294