Oki MSM80C154S, MSM83C154S User Manual

MSM80C154S/83C154S¡ Semiconductor

¡ Semiconductor

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 termi­nated by interrupt signal enabling execution from
the interrupted address.

259

¡ SemiconductorMSM80C154S/83C154S

• Package options

40-pin plastic DIP (DIP40-P-600-2.54) :

44-pin plastic QFP (QFP44-P-910-0.80-2K) :

44-pin QFJ (QFJ44-P-S650-1.27) : (Product name: MSM80C154SJS/

44-pin TQFP (TQFP44-P-1010-0.80-K) : (Product name: MSM80C154STS-K/

(Product name: MSM80C154SRS/

MSM83C154S-xxxRS)

(Product name: MSM80C154SGS-2K/

MSM83C154S-xxxGS-2K)

MSM83C154S

MSM83C154S-xxxTS-K)

xxx: indicates the code number

-xxx

JS)

260

P2.0

BLOCK DIAGRAM (MSM83C154S)

XTAL1

XTAL2

RESET

P1.0

P1.7

ALE

PSEN

EA

P2.7

P0.0

P0.7

OSC and TIMING

PORT 1PORT 3

PORT 2PORT 0

PCONIOCON

PCHL

PCH

T2CON

TIMER/

COUNTER 2

PCLL

TL2

RCAP2L

PCL

ROM

16K WORDS x 8BITS

ADDRESS DECODER

SENSE AMP

TH2

RCAP2H

R/W AMP

RAM

256 WORDS

x 8BITS

DPH

DPL

SP

RAMDP

CONTROL SIGNAL

PLA

IR AIR

TR2ACC

PSW

SIGNALR/W

SPECIAL
FUNCTION
REGISTER

ADDRESS
DECODER

C-ROM

TR1

BR

ALU

MSM80C154S/83C154S¡ Semiconductor

261

P3.0

P3.7

TH1 TL1 TH0 TL0 TMOD TCON IE IP SBUF(T) SBUF(R)

TIMER/COUNTER 0 & 1

INTERRUPT

SERIAL IO

SCON

PIN CONFIGURATION (TOP VIEW)

¡ SemiconductorMSM80C154S/83C154S

P1.0/T2

P1.1/T2EX

P1.2
P1.3
P1.4
P1.5
P1.6
P1.7

RESET

P3.0/RXD

P3.1/TXD
P3.2/INT0
P3.3/INT1

P3.4/T0

P3.5/T1/HPDI

P3.6/WR

P3.7/RD

XTAL2
XTAL1

V

1
2
3
4
5
6
7
8
9

10
11
12
13
14
15
16
17
18

19
20

SS

40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21

V

CC

P0.0
P0.1
P0.2
P0.3
P0.4
P0.5
P0.6
P0.7

EA

ALE

PSEN

P2.7
P2.6
P2.5
P2.4
P2.3
P2.2
P2.1
P2.0

262

40-Pin Plastic DIP

PIN CONFIGURATION (Continued)

P1.4
4443424140393837363534

P1.3

P1.2

P1.1

P1.0NCV

MSM80C154S/83C154S¡ Semiconductor

CC

P0.0

P0.1

P0.2

P0.3

P1.5
P1.6
P1.7

RESET

P3.0/RXD

NC

P3.1/TXD
P3.2/INT0
P3.3/INT1

P3.4/T0

P3.5/T1/HPDI

1
2
3
4
5
6
7
8

9
10
11

1213141516171819202122

SSVSS

V

XTAL2

XTAL1

P3.7/RD

P3.6/WR

NC : No-connection pin

44-Pin Plastic QFP

P2.0

P2.1

P2.2

P2.3

P2.4

33
32
31
30
29
28
27
26
25
24
23

P0.4
P0.5
P0.6
P0.7
EA
NC
ALE
PSEN
P2.7
P2.6
P2.5

263

CC

P0.0

P0.1

P0.2

P1.4

P1.3

P1.2

P1.1

P1.0NCV

4443424140393837363534

P0.3

¡ SemiconductorMSM80C154S/83C154S

P1.5
P1.6
P1.7

RESET

P3.0/RXD

NC

P3.1/TXD
P3.2/INT0
P3.3/INT1

P3.4/T0

P3.5/T1/HPDI

1
2
3
4
5
6
7
8

9
10
11

1213141516171819202122

SSVSS

V

XTAL2

XTAL1

P3.7/RD

P3.6/WR

NC : No-connection pin

44-Pin Plastic TQFP

P2.0

P2.1

P2.2

P2.3

P2.4

33
32
31
30
29
28
27
26
25
24
23

P0.4
P0.5
P0.6
P0.7
EA
NC
ALE
PSEN
P2.7
P2.6
P2.5

264

PIN CONFIGURATION (Continued)

P0.5

P0.4
3938373635343332313029

P0.6

P0.7EANC

ALE

PSEN

P2.7

P2.6

MSM80C154S/83C154S¡ Semiconductor

P2.5

P0.3
P0.2
P0.1
P0.0

V

NC

P1.0/T2

P1.1/T2EX

P1.2
P1.3
P1.4

40
41
42
43
44

CC

1
2
3
4
5
6

7

8

9

P1.5

10111213141516

P1.6

P1.7

NC

RESET

P3.0/RXD

P3.1/TXD

P3.2/INT0

P3.3/INT1

17

P3.4/T0

P3.5/T1/HPDI

28
27
26
25
24
23
22
21
20
19
18

P2.4
P2.3
P2.2
P2.1
P2.0
NC
V

SS

XTAL1
XTAL2
P3.7/RD
P3.6/WR

NC : No-connection pin

44-Pin Plastic QFJ

265

PIN DESCRIPTIONS

Symbol Descriptipn

P0.0 to P0.7

Bidirectional I/O ports. They are also the data/address bus (input/output of data and output of
lower 8-bit address when external memory is accessed).
They are open-drain outputs when used as I/O ports, but 3-state outputs when used as data/address
bus.

¡ SemiconductorMSM80C154S/83C154S

P1.0 to P1.7

P2.0 to P2.7

P3.0 to P3.7

P1.0 to P1.7 are quasi-bidirectional I/O ports. They are pulled up internally when used as input
ports. Two of them have the following secondary functions:

•P1.0 (T2)

•P1.1 (T2EX)

P2.0 to P2.7 are quasi-bidirectional I/O ports. They also output the higher 8-bit address when
an external memory is accessed. They are pulled up internally when used as input ports.

P3.0 to P3.7 are quasi-bidirectional I/O ports. They are pulled up internally when used as input
ports. They also have the following secondary functions:

•P3.0 (RXD)
Serial data input/output in the I/O expansion mode and serial data input in the UART mode when

the serial port is used.

•3.1 (TXD)
Synchronous clock output in the I/O expansion mode and serial data output in the UART mode
when the serial port is used.

•3.2 (INT0)
Used as input pin for the external interrupt 0, and as count-up control pin for the timer/counter 0.

•3.3 (INT1)
Used as input pin for the external interrupt 1, and as count-up control pin for the timer/counter 1.

•3.4 (T0)
Used as external clock input pin for the timer/counter 0.

•3.5 (T1)
Used as external clock input pin for the timer/counter 1 and power-down-mode control input pin.

•3.6 (WR)
Output of the write-strobe signal when data is written into external data memory.

•3.7 (RD)
Output of the read-strobe signal when data is read from external data memory.

: used as external clock input pins for the timer/counter 2.
: used as trigger input for the timer/counter 2 to be reloaded or captured;
causing the timer/counter 2 interrupt.

ALE

PSEN

EA

266

Address latch enable output for latching the lower 8-bit address during external memory access.
Two ALE pulses are activated per machine cycle except during external data memory access at
which time one ALE pulse is skipped.

Program store enable output which enables the external memory output to the bus during external
program memory access. Two PSEN pulses are activated per machine cycle except during
external data memory access at which two PSEN pulses are skipped.

When EA is held at "H" level, the MSM 83C154S executes instructions from internal program
memory at address 0000H to 3FFFH, and executes instructions from external program memory
above address 3FFFH.
When EA is held at "L" level, the MSM80C154S/MSM83C154S executes instructions from external
program memory for all addresses.

PIN Descriptions (Continued)

Symbol Descriptipn

RESET

If this pin remains "H" for at least one machine cycle, the MSM80C154S/MSM83C154S is reset.
Since this pin is pulled down internally, a power-on reset is achieved by simply connecting a
capacitor between V

and this pin.

CC

MSM80C154S/83C154S¡ Semiconductor

XTAL1
XTAL2
V

CC

V

SS

Oscillator inverter input pin. External clock is input through XTAL1 pin.
Oscillator inverter output pin.
Power supply pin during both normal operation and standby operations.
GND pin.

267

REGISTERS

Diagram of Special Function Registers

¡ SemiconductorMSM80C154S/83C154S

REGISTER

NAME

IOCON

B

ACC

PSW

TH2

TL2

RCAP2H

RCAP2L

T2CON

IP

P3

IE

P2

SBUF

SCON

P1
TH1
TH0

TL1
TL0

TMOD

TCON
PCON

DPH

DPL

SP
P0

b7 b5 b4 b3 b2 b1 b0b6
FF
F7
E7

D7

CF
BF

B7

AF

A7

9F
97

8F

87

FE
F6
E6
D6

CE
BE
B6
AE
A6

9E
96

8E

86

BIT ADDRESS

FD
F5
E5
D5

CD
BD
B5
AD
A5

9D
95

8D

85

FC
F4
E4
D4

CC
BC
B4
AC
A4

9C
94

8C

84

FB
F3
E3
D3

CB
BB
B3
AB
A3

9B
93

8B

83

FA
F2
E2
D2

CA
BA
B2
AA
A2

9A
92

8A

82

F9
F1
E1

D1

C9
B9
B1
A9
A1

99
91

89

81

F8
F0
E0

D0

C8
B8
B0
A8
A0

98
90

88

80

DIRECT

ADDRESS

0F8H (248)
0F0H (240)
0E0H (224)

0D0H (208)

0CDH (205)

0CCH (204)
0CBH (203)
0CAH (202)
0C8H (200)
0B8H (184)
0B0H (176)
0A8H (168)
0A0H (160)

99H (153)
98H (152)
90H (144)
8DH (141)
8CH (140)
8BH (139)
8AH (138)
89H (137)
88H (136)
87H (135)
83H (131)
82H (130)
81H (129)
80H (128)

268

Special Function Registers

Timer mode register (TMOD)

MSM80C154S/83C154S¡ Semiconductor

NAME

TMOD 89H GATE C/T M1 M0 GATE C/T M1 M0

BIT LOCATION FLAG FUNCTION

TMOD.0 M0 M1 M0

TMOD.2 C/T

TMOD.3 GATE

TMOD.4 M0 M1 M0

TMOD.5 M1

TMOD.6 C/T

TMOD.7 GATE

ADDRESS

MSB LSB

76543210

Timer/counter 0 mode setting
00
01
10
11TMOD.1 M1

Timer/counter 0 count clock designation control bit.
XTAL1•2 divided by 12 clocks is the input applied to timer/counter 0 when
C/T = "0".
The external clock applied to the T0 pin is the input applied to timer/counter 0
when C/T = "1".

When this bit is "0", the TR0 bit of TCON (timer control register) is used to
control the start and stop of timer/counter 0 counting.
If this bit is "1", timer/counter 0 starts counting when both the TR0 bit of TCON
and INT0 pin input signal are "1", and stops counting when either is changed
to "0".

00
01
10
11

Timer/counter 1 count clock designation control bit.
XTAL1•2 divided by 12 clocks is the input applied to timer/counter 1 when
C/T = "0".
The external clock applied to the T1 pin is the input applied to timer/counter 1
when C/T = "1".

When this bit is "0", the TR1 bit of TCON is used to control the start and stop of
timer/counter 1 counting.
If this bit is "1", timer/counter 1 starts counting when both the TR1 bit of TCON
and INT1 pin input signal are "1", and stops counting when either is changed
to "0".

8-bit timer/counter with 5-bit prescalar.

16-bit timer/counter.

8-bit timer/counter with 8-bit auto reloading.

Timer/counter 0 separated into TLO (8-bit) timer/counter

and TH0 (8-bit) timer/counter. TF0 is set by TL0 carry, and

TF1 is set by TH0 carry.

Timer/counter 1 mode setting

8-bit timer/counter with 5-bit prescalar.

16-bit timer/counter

8-bit timer/counter with 8-bit auto reloading.

Timer/counter 1 operation stopped.

269