Pin Plastic QFJ, EA P3.0/RXD 34 NC 33 ALE P3.1/TXD

¡ Semiconductor

MSM80C154S/83C154S

PIN CONFIGURATION (Continued)

P0.3 40

P0.2 41

P0.1 42

P0.0 43

VCC 44

NC 1 P1.0/T2 2 P1.1/T2EX 3 P1.2 4 P1.3 5 P1.4 6

39 P0.4

P1.5 7

38 P0.5

P1.6 8

37 P0.6

P1.7 9

36 P0.7

RESET 10

35 EA

P3.0/RXD 11

34 NC

NC 12

33 ALE

P3.1/TXD 13

32 PSEN

P3.2/INT0 14

31 P2.7

P3.3/INT1 15

30 P2.6

P3.4/T0 16

29 P2.5

P3.5/T1/HPDI 17

28P2.4

27P2.3

26P2.2

25P2.1

24P2.0

23NC

22VSS

21XTAL1

20XTAL2

19P3.7/RD

18 P3.6/WR

NC : No-connection pin

44-Pin Plastic QFJ

265

Page 7

Image 7

Oki MSM83C154S, MSM80C154S manual Pin Plastic QFJ, EA P3.0/RXD 34 NC 33 ALE P3.1/TXD, XTAL1 XTAL2 19 P3.7/RD 18 P3.6/WR

Contents

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