Oki MSM83C154S, MSM80C154S manual Pin Plastic QFJ, EA P3.0/RXD 34 NC 33 ALE P3.1/TXD

Page 7

¡ 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

Image 7

Contents Cmos 8-bit Microcontroller FeaturesGeneral Description ¡SemiconductorSemiconductor MSM80C154S/83C154S¡ Semiconductor MSM80C154S/83C154SAddress Decoder SignalTIMER/COUNTER 0 Interrupt 2PORTPin 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 P1.7Pin 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 RegistersGate Special Function Registers Timer mode register TmodInterrupt signal Power control register PconCPU is reset TR1 TF0 TR0 IE1 IT1 IE0 IT0 Timer control register TconInterrupt request flag for external interrupt TconREN 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 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 RatingsDC Characteristics Electrical CharacteristicsPort 0, ALE, Psen Maximum power supply current idle mode ICC mA Maximum power supply current normal operation ICC mALogical 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 WidthPORT0 External program memory read cycleInstr 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