Oki MSM83C154S 2PORT, Address Decoder, Signal, ALE Timing Pcon, Register Pchl Pcll, Pch Pcl, Air

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P2.0

2PORT

BLOCK

P2.7

ADDRESS DECODER

DPH

CONTROL

SIGNAL

R/W

SIGNAL

DIAGRAM(MSM83C154S)

ALE

TIMING

PCON

ROM

SPECIAL

P0.0

0

DPL

PLA

FUNCTION

PORT

REGISTER

PCHL

PCLL

16K WORDS x 8BITS

ADDRESS

P0.7

DECODER

XTAL1

PCH

PCL

SENSE AMP

SP

IR

AIR

XTAL2

andOSC

IOCON

C-ROM

PSEN

EA

RESET

T2CON

TL2

TH2

R/W AMP

ACC

TR2

TR1

P1.0

RAM

RAMDP

1

RCAP2L

RCAP2H

256 WORDS

PSW

BR

TIMER/

x 8BITS

PORT

ALU

COUNTER 2

P1.7

P3.0

3

PORT

TH1

TL1

TH0

TL0

TMOD

TCON

IE

IP

SBUF(T)

SBUF(R)

SCON

P3.7

TIMER/COUNTER 0 & 1

INTERRUPT

SERIAL IO

261

¡ Semiconductor

MSM80C154S/83C154S

Image 3

Contents Cmos 8-bit Microcontroller FeaturesGeneral Description ¡SemiconductorSemiconductor MSM80C154S/83C154S¡ Semiconductor MSM80C154S/83C154SAddress Decoder SignalTIMER/COUNTER 0 Interrupt 2PORTPIN Configuration TOP View Pin Plastic DIPPsen 25 P2.7 24 P2.6 23 P2.5 P2.4 ResetPin Plastic QFP 44 P1.4 P1.5 P1.6 P1.7Pin 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 Registers Diagram of Special Function RegistersGate Special Function Registers Timer mode register TmodPower control register Pcon Interrupt signalCPU is reset TR1 TF0 TR0 IE1 IT1 IE0 IT0 Timer control register TconInterrupt request flag for external interrupt TconSerial port control register Scon RENMode Overall interrupt control bit Interrupt enable register IEInterrupt control bit for serial port Reserved bit. The output data is 1 if the bit is readPCT PT2 PT1 PX1 PT0 PX0 Priority is assigned when bit isInterrupt priority register IP Priority interrupt circuit control bitBank Received at a serial port When this bit is set toControl register Iocon IZCTimer 2 control register T2CON Program Area Memory MapsBANK2 HEX 0FF AddressingindirectregisterBIT RAM BANK30FH MSM80C154S/83C154S Diagram of Internal Data Memory RAM0FFH 2FHRecommended Operating Conditions Absolute Maximum RatingsElectrical Characteristics DC CharacteristicsPort 0, ALE, Psen Maximum power supply current idle mode ICC mA Maximum power supply current normal operation 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 To ALE Falling Edge Address Hold Time ALE Signal WidthAddress Setup Time Falling Edge Psen Signal WidthExternal program memory read cycle PORT0Instr External data memory access AC characteristics External data memory write cycle External data memory read cycleParameter Symbol Min Max Unit Serial port I/O Extension Mode AC characteristicsInput Data ALE Shift ClockExternal Clock Drive Waveform AC Characteristics Measuring ConditionsExternal Oscillator Signal XTAL1 external clock input waveform conditions294 Basictiming TimingDiagram