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(1) Microprocessor mode [OJ

Dans le document ~ SINGLE-CHIP 16-BITI Enlarged (Page 191-198)

Wtie,n the system is reset with the CNV~s pin connected to odd-numbered address and an even~numbered address are being accessed simultaneously,

ALE is the address latch enable signal. It is used for latch-ingthe,address signal from a multiplexed signal containing addresses and data. When ALE is at the "H" level, the latch opens to pass off the address signal. When ALE is at the

"L" level, it retains the address signal.

HOLD is the hold request signal. ,It is an input signal used

ternal clock", later than the status signal changes to [ST1 connected to 2Vee. This mode is usually used for evaluation equipment.

16·BIT CMOS MICROCOMPUTER

the CPU uses flag x, however, the MX signal carries the

Table 9. Relationship between the CNVss pin input levels and processor modes

CNV ss Mode Description

Microprocessor mode upon Vss • Microprocessor starting after reset. Evaluation

or chip mode can be selected

CLOCK GENERATING CIRCUIT

Figure 90 shows a block diagram of the clock generator.

When a STP instruction is executed, the internal clock 1>

stops oscillating at "L" level. At the same time, FFF'6 is written to watchdog timer and the watchdog timer input connection is forced to f32 . This connection is broken' and connected to the input determined by the watchdog timer frequency selection flag when the most significant bit of the watchdog timer is cleared or reset.

Oscillation restarts when an interrupt is received, but the internal clock 1> remains at "L" level until the most signifi-cant bit of the watchdog timer is cleared. This is to avoid the unstable interval at the start of oscillation when using a ceramic resonator. When a WIT instruction is executed, the internal clock 1> stops at "L" level, but the oscillator does not stop. The clock is restarted when an interrupt is re-ceived. Instructions can be executed immediately because the oscillator is not stopped.

The stop or wait state is released when an interrupt is re-ceived or when reset is issued. Therefore, interrupts must be enabled before executing a STP or WIT instruction.

Figure 91 shows a circuit example using a ceramic (or quartz crystal) resonator. Use the manufacturer's recom-mended values for constants such as capacitance which differ for each resonator. Figure 92 shows an example of using an external clock signal.

Interrupt request S Q

STP instruction R WIT instruction R

MITSUBISHI MICROCOMPUTERS

M37720S1FP,M37720S1AFP

16·BIT CMOS MICROCOMPUTER

M37720S1FP

X,N XOUT

37 lMQ 38

Rd

<

lOt I I

r

-Fig.91 Circuit using a ,ceramic resonator

M37720S1FP

37

External clock source Vee

n n n r

Vss -I U U U

Fig.92 External clock input circuit

Reset

XOUT

38 Open

Clock 1> 1 output

Fig.90 Block diagram of a clock generator

2-162

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"'ELECTRIC

MITSUBISHI MICROCOMPUTERS

M37720S1FP,M37720S1AFP

ADDRESSING MODES

The M37720S1 FP has 28 powerful addressing modes.

Refer to the MELPS 7700 addressing mode description for the details of each addressing mode.

MACHINE INSTRUCTION LIST

The M37720S1 FP has 103 machine instructions. Refer to the MELPS 7700 machine instruction list for details.

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16-BIT CMOS MICROCOMPUTER

2-163

~ ~

!I I

I

MITSUBISHI MICROCOMPUTERS

M37720S1FP,M37720S1AFP

16-BIT CMOS MICROCOMPUTER

ABSOLUTE MAXIMUM RATINGS

Symbol

Input voltage A,/D,-A'5/D15. A16/Do-A"/D,. P4,-P4"

P50-P5" P6o-P6" P7o-P7" pao-PB"

P90-P9" Pl0o-Pl0" RDY, HOLD, X'N, VREF

Output voltage Ao/MAo-A,/MA" A,/D,-A15/D15, A16/Do-A"fO" P4,-P4" P50-P5"

P6o-P6" P7o-P7" PBo-pa,. P90-P9"

P10o ... P107, 1>1, RESEToUT , XOUT , E, STO, ST1, ALE, BLE, BHE, R/IV

Power dissipation T opr Operating temperature T sto Storage temperature

Conditions Ratings

RECOMMENDED OPERATING CONDITIONS

(Vee=5V±10%, Ta=-20-85°C, unless otherwise noted) Limits

Symbol Parameter Unit

Min. Typ. Max.

Vee Supply voltage 4.5 5.0 5.5 V

AVee Analog supply voltage Vee V

Vss Supply voltage 0 V

AVss Analog supply voltage 0 V

High-level input voltage P4,-P47 , P50-P5" P6o-P6"

V ,H P7o-P7" PBo-pa" P90-P9" High-level peak output current Ao/MAo ... AlIMA7, As/Ds-Ats/D15,

A16/Do-A23/07, P43 ... P47, P50 ... P57, 10H(peak) P6o-P6" P7o-P7" P8o-P8"

pgo-P9" PIOo-Pl0" h -10 mA

RESET OUT, STO, ST1, ALE, BlE, BHE, R/iN

High-level average output current Ao/MAo-A7/MA7, Aa/Da""A15/D15, A16lDo- A23/D" P43-P47 , P50-P5"

I

IOHcavg) P60-P67, P7o-P7" P8o-P8" P90-P9" -5 mA

Pl0o-Pl0" ~" RESETouT,STO, sn,

ALE, SlE, BHE, R/iN Low·level peak output current Ao/MAo ... A7/MA7, As/Os ... A15/D15,

A16/Do ... A23/D7, P43-P47, P50""P57, loLl peak) P6o-P6" P7o-P7" P8o-P8" P90-P9"

- - - 10 mA

Pl0o-PlO" ~" RESETouT, STO, sn,

ALE, SlE, SHE, R/iN

Low·level average output current Ao/MAo ... A7/MA7, As/Ds ... A15/D15, A16/Do""A23/D7, P43-P47, P50""P571

IOLlavg) P6o-P6" P7o-P7" P8o-P8" 5 mA

P90-P9" Pl0o-Pl0" ~" RESETouT, STO, sn, ALE, SlE, SHE, R/iN

f(X,N )

I

M37720Sl FP 8

External clock frequency input

I

M37720Sl AFP

16 MHz

MITSUBISHI MICROCOMPUTERS

M37720S1FP,M37720S1AFP

16-BIT CMOS MICROCOMPUTER

M37720S1FP

ELECTRICAL CHARACTERISTICS

(Vcc =5V, Vss=ov, Ta=25'C, f(X'N)=8MHz, unless otherwise noted) Limits

Symbol Parameter Test conditions Unit

Min. Typ. Max.

High-level output voltage Ao/MAo-A,/MA" A,/D,-A15/D15, A16/Do-A23/07. P43 ... P47,

V OH P50-P5" P60-P6" P70-P7"

10H=-lOmA 3 V

P8Q-P8" P90-P9" P1Oo-Pl0"

- - -

-¢" RESETouT, STO, ST1, ALE, BLE, BHE, R/W

High-level output voltage Ao/MAo-A,/MA" A,/D,-A'51D15,

V OH A16lDo-A"ID" Mila, MAg, RAS, - IOH=-400!,A 4.7 V

CAS, ¢" STO, ST1, BLE, BHE, R/W

10H=-lOmA 3.1

V OH High-level output voltage ALE

4.8 V

IOH=-400!,A

High-level output voltage E 10H=-lOmA 3.4

V OH V

IOH=-400!,A 4.8

Low-level output voltage Ao/MAo-A7/MA?, Aa/Da-A1s/D15, A16iDo-A"ID" P43-P4" P50-P5"

VOL P60-P6" P70-P7" P80-P8"

P90-P9" Pl00-Pl0" ¢" 10L=lOmA 2 V

RESET OUT, STO, ST1, ALE, BLE,

-

-BHE, R/W

Low-level output voltage Ao/MAo-A,/MA" A,/D,-A,51D'5, -VOL A16IDO-A23/D" MA" MAg, RAS,

IOL=-2mA 0.45 V

CAS, ¢" STO, ST1, BLE, BHE,

-R/W

10L=lOmA 1.9

VOL Low-level output voltage ALE

0.43 V

loc.=2mA

Low-level output voltage E 10L-lOmA 1.6

VOL V

IOL=2mA 0.4

I

Hysteresis RDY, HOLD, TA2'N-TA4'N, T80'N, TB1'N.

-

-VT+-VT- INTo-INT" ADTRG, CTSo, CTS" CLKo, CLK, 0.4 1 V

DMAREQO-DMAREQ3, TC

Vr+-VT- Hysteresis RESET . - 0.2 0.5 V

VT+-VT - Hysteresis X1N 0.1 0.3 V

High-level input current As/Ds--..A1s/D15, A1f/Do-A23/D7.

P43-P4" P50-P5" P60-P6,.

I'H P70-P7" PSo-PS" P90-P9" V,=5V 5 J"A

Pl00-PIO"RDY, HOLD, BYTE, CNVss, X'N, RESET -

-Low-level input current Aa/Os ... A1SJD15, A16/Do ... A23/07, P43-P4" P50-P5" P60-P6"

III P70-P7" P80-P8" P90-P9" v,=OV -5 J"A

PIOo-PIO" RDY, HOLD, BYTE, CNVss, X'N, RESET

VRAM RAM hold voltage When clock is stopped 2 V

f(X'N)=8MHz square waveform 9 18 mA

Icc Power supply current T a=25'C when clock is stopped 1

T a=85'C when clock is stopped 20 J"A

2-165

.

MITSUBISHI MICROCOMPUTERS

M37720S1FP,M37720S1AFP

16-BIT CMOS MICROCOMPUTER

M37720S1AFP

ELECTRICAL CHARACTERISTICS

(Vcc =5V, Vss=ov, T a=25'C, f(X'N)=16MHz)

Symbol

Parameter Test conditions

High-level output voltage Ao/MAo ... Al/MA?, Aa/Ds ... A1S/015,

High-level output voltage Ao/MAo-A7/MA?, Aa/Ds ... AH/D15,

A16/Do-A"ID 7, MAs, MAg, RAS, IOH=-400!,A CAS, ¢" STO, ST1, BLE, BHE, R/IV

IOH=-10mA High·level output voltage ALE

IOH=-400!,A

- IOH=-10mA

High-level output voltage E

IOH=-400,uA Low-level output voltage Ao/MAo-A7/MA?, Aa/Oa--Als/D15,

A1S/Do ... A23/D7, P43-P47 , P50 ... P57, Low-level output voltage ALE

IOL=2mA -Low-level input current A8/0s ... A15/015, A16/0o ... A23/07,

P43-P47, P50~P57, P6o-P67,

P7o-P77, paO-P87, P90-P97, V,=OV PIOo-Pl07, RDY, HOLD, BYTE,

-CNVss, X'N, RESET

RAM hold voltage When clock is stopped

f(X,N)=16MHz square waveform

Power supply current T a=25"C when clock is stopped

MITSUBISHI MICROCOMPUTERS

M37720S1FP,M37720S1AFP

i6-BIT CMOS MICROCOMPUTER

A-O CONVERTER CHARACTERISTICS

(Vcc =5V, Vss=ov, Ta=25'C, unless otherwise noted) Limits

TIMING REQUIREMENTS

(Vcc=5V±10%, Vss=ov, Ta=25"C, unless otherwise noted)

External clock input

Dans le document ~ SINGLE-CHIP 16-BITI Enlarged (Page 191-198)