Oki manual MSM80C154S/83C154S Diagram of Internal Data Memory RAM, 0FFH, 2FH, 0FH, Diriect

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MSM80C154S/83C154S

Diagram of Internal Data Memory (RAM)

0FFH				USER DATA RAM
80H				USER DATA RAM
80H
7FH
7FH				USER DATA RAM
30H				USER DATA RAM
30H
2FH	7F	7E	7D		7C	7B	7A	79	78
2EH
2EH	77	76	75		74	73	72	71	70
2DH
2DH	6F	6E	6D		6C	6B	6A	69	68
2CH
2CH	67	66	65		64	63	62	61	60
2BH
2BH	5F	5E	5D		5C	5B	5A	59	58
2AH
2AH	57	56	55		54	53	52	51	50
29H
29H	4F	4E	4D		4C	4B	4A	49	48
28H
28H	47	46	45		44	43	42	41	40
27H
27H	3F	3E	3D		3C	3B	3A	39	38
26H
26H	37	36	35		34	33	32	31	30
25H
25H	2F	2E	2D		2C	2B	2A	29	28
24H
24H	27	26	25		24	23	22	21	20
23H
23H	1F	1E	1D		1C	1B	1A	19	18
22H
22H	17	16	15		14	13	12	11	10
21H
21H	0F	0E	0D		0C	0B	0A	09	08

20H	07	06	05		04	03	02	01	00
1FH
1FH
					Bank 3
18H
17H
17H

Bank 2

10H

0FH

Bank 1

08H

07H

Bank 0

00H

¡ Semiconductor

255
128
127
48
47
46
45	ADDRESSINGBIT	ADDRESSINGDATA	ADDRESSINGINDIRECT1,0,REGISTER
44	ADDRESSINGBIT	ADDRESSINGDATA	ADDRESSINGINDIRECT1,0,REGISTER
44
43
42
41
40
39
38
37
36
35
34
33
32
31	ADDRESSING
24	ADDRESSING
24
23	DIRIECT
15	DIRIECT
16
	0-7
8	REGISTERS
8
7
0

280

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Contents ¡SemiconductorSemiconductor MSM80C154S/83C154S FeaturesGeneral Description Cmos 8-bit MicrocontrollerMSM80C154S/83C154S ¡ Semiconductor2PORT SignalTIMER/COUNTER 0 Interrupt Address DecoderPin Plastic DIP PIN Configuration TOP ViewPsen 44 P1.4 P1.5 P1.6 P1.7 ResetPin Plastic QFP 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 Diagram of Special Function Registers RegistersSpecial Function Registers Timer mode register Tmod GateInterrupt signal Power control register PconCPU is reset Tcon Timer control register TconInterrupt request flag for external interrupt TR1 TF0 TR0 IE1 IT1 IE0 IT0REN Serial port control register SconMode Reserved bit. The output data is 1 if the bit is read Interrupt enable register IEInterrupt control bit for serial port Overall interrupt control bitPriority interrupt circuit control bit Priority is assigned when bit isInterrupt priority register IP PCT PT2 PT1 PX1 PT0 PX0Bank IZC When this bit is set toControl register Iocon Received at a serial portTimer 2 control register T2CON Memory Maps Program AreaBANK3 HEX 0FF AddressingindirectregisterBIT RAM BANK22FH MSM80C154S/83C154S Diagram of Internal Data Memory RAM0FFH 0FHAbsolute Maximum Ratings Recommended Operating ConditionsDC Characteristics Electrical CharacteristicsPort 0, ALE, Psen Maximum power supply current normal operation ICC mA Maximum power supply current idle mode 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 Falling Edge Psen Signal Width ALE Signal WidthAddress Setup Time To ALE Falling Edge Address Hold TimePORT0 External program memory read cycleInstr 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 DataXTAL1 external clock input waveform conditions AC Characteristics Measuring ConditionsExternal Oscillator Signal External Clock Drive WaveformBasictiming TimingDiagram 294

MSM80C154S/83C154S

Diagram of Internal Data Memory (RAM)

0FFH

2FH

0FH

¡ Semiconductor

DIRIECT