Oki MSM83C154S, MSM80C154S manual General Description, Features, Cmos 8-bit Microcontroller

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¡SemiconductorSemiconductor MSM80C154S/83C154S

MSM80C154S/83C154S

CMOS 8-bit Microcontroller

GENERAL DESCRIPTION

The MSM80C154S/MSM83C154S, designed for the high speed version of the existing MSM80C154/MSM83C154, is a higher performance 8-bit microcontroller providing low-power consumption.

The MSM80C154S/MSM83C154S covers the functions and operating range of the existing MSM80C154/83C154/80C51F/80C31F.

The MSM80C154S is identical to the MSM83C154S except it does not contain the internal program memory (ROM).

FEATURES

• Operating range
Operating frequency	: 0 to 3 MHz (Vcc=2.2 to 6.0 V)
	0 to 12 MHz (Vcc=3.0 to 6.0 V)
	0 to 24 MHz (Vcc=4.5 to 6.0 V)
Operating voltage	: 2.2 to 6.0 V
Operating temperature	: –40 to +85°C (Operation at +125°C conforms to
	the other specification.)

•Fully static circuit

•Upward compatible with the MSM80C51F/80C31F

• On-chip program memory	:	16K words x 8 bits ROM (MSM83C154S only)
• On-chip data memory	:	256 words x 8 bits RAM
• External program memory address space :		64K bytes ROM (Max)
• External data memory address space	:	64K bytes RAM
• I/O ports	:	4 ports x 8 bits
(Port 1, 2, 3, impedance programmable)	:	32
• 16-bit timer/counters	:	3
• Multifunctional serial port	:	I/O Expansion mode
	:	UART mode (featuring error detection)

•6-source 2-priority level Interrupt and multi-level

Interrupt available by programming IP and IE registers

•Memory-mapped special function registers

•Bit addressable data memory and SFRs

• Minimum instruction cycle	: 500 ns @ 24 MHz operation
• Standby functions	: Power-down mode (oscillator stop)
	Activated by software or hardware; providing
	ports with floating or active status
	The software power-down stet mode is termi-
	nated by interrupt signal enabling execution from
	the interrupted address.

259

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Contents General Description Features¡SemiconductorSemiconductor MSM80C154S/83C154S Cmos 8-bit Microcontroller¡ Semiconductor MSM80C154S/83C154STIMER/COUNTER 0 Interrupt Signal2PORT Address DecoderPin Plastic DIP PIN Configuration TOP ViewPsen Pin Plastic QFP Reset44 P1.4 P1.5 P1.6 P1.7 25 P2.7 24 P2.6 23 P2.5 P2.4Pin 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 Interrupt request flag for external interrupt Timer control register TconTcon TR1 TF0 TR0 IE1 IT1 IE0 IT0REN Serial port control register SconMode Interrupt control bit for serial port Interrupt enable register IEReserved bit. The output data is 1 if the bit is read Overall interrupt control bitInterrupt priority register IP Priority is assigned when bit isPriority interrupt circuit control bit PCT PT2 PT1 PX1 PT0 PX0Bank Control register Iocon When this bit is set toIZC Received at a serial portTimer 2 control register T2CON Program Area Memory MapsBIT RAM HEX 0FF AddressingindirectregisterBANK3 BANK20FFH MSM80C154S/83C154S Diagram of Internal Data Memory RAM2FH 0FHRecommended 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 Address Setup Time ALE Signal WidthFalling Edge Psen Signal Width To ALE Falling Edge Address Hold TimePORT0 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 Oscillator Signal AC Characteristics Measuring ConditionsXTAL1 external clock input waveform conditions External Clock Drive Waveform294 Basictiming TimingDiagram