MITSUBISHI MICROCOMPUTERS
3827 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
DESCRIPTION
The 3827 group is the 8-bit microcomputer based on the 740 fam-
ily core technology.
The 3827 group has the LCD drive control circuit, the A-D/D-A
converter, the UART, and the PWM as additional functions.
The various microcomputers in the 3827 group include variations
of internal memory size and packaging. For details, refer to the
section on part numbering.
For details on availability of microcomputers in the 3827 group, re-
fer to the section on group expansion.
FEATURES
qBasic
machine-language instructions ...................................... 71
qThe
minimum instruction execution time ........................... 0.5
µs
(at 8MHz oscillation frequency)
qMemory
size
ROM ................................................................. 4 K to 60 K bytes
RAM ................................................................. 192 to 2048 bytes
qProgrammable
input/output ports ............................................ 55
qOutput
port ................................................................................. 8
qInput
port .................................................................................... 1
qInterrupts
................................................. 17 sources, 16 vectors
(includes key input interrupt)
qTimers
........................................................... 8-bit
!
3, 16-bit
!
2
qSerial
I/O1 .................... 8-bit
!
1 (UART or Clock-synchronized)
qSerial
I/O2 ...................................8-bit
!
1 (Clock-synchronized)
qPWM
output .................................................................... 8-bit
!
1
qA-D
converter ............................................... 10-bit
!
8 channels
qD-A
converter ................................................. 8-bit
!
2 channels
qLCD
drive control circuit
Bias ................................................................................... 1/2, 1/3
Duty ........................................................................... 1/2, 1/3, 1/4
Common output .......................................................................... 4
Segment output ........................................................................ 40
q2
Clock generating circuits
(connect to external ceramic resonator or quartz-crystal oscillator)
qWatchdog
timer ............................................................ 14-bit
!
1
qPower
source voltage ................................................ 2.2 to 5.5 V
qPower
dissipation
In high-speed mode .......................................................... 40 mW
(at 8 MHz oscillation frequency, at 5 V power source voltage)
In low-speed mode ............................................................ 60
µW
(at 32 kHz oscillation frequency, at 3 V power source voltage)
qOperating
temperature range ................................... – 20 to 85°C
APPLICATIONS
Camera, wireless phone, etc.
PIN CONFIGURATION (TOP VIEW)
SEG
10
SEG
11
SEG
12
SEG
13
SEG
14
SEG
15
SEG
16
SEG
17
P3
0
/SEG
18
P3
1
/SEG
19
P3
2
/SEG
20
P3
3
/SEG
21
P3
4
/SEG
22
P3
5
/SEG
23
P3
6
/SEG
24
P3
7
/SEG
25
P0
0
/SEG
26
P0
1
/SEG
27
P0
2
/SEG
28
P0
3
/SEG
29
P0
4
/SEG
30
P0
5
/SEG
31
P0
6
/SEG
32
P0
7
/SEG
33
P1
0
/SEG
34
P1
1
/SEG
35
P1
2
/SEG
36
P1
3
/SEG
37
P1
4
/SEG
38
P1
5
/SEG
39
73
68
56
80
64
63
71
70
58
57
75
65
61
60
77
72
79
67
74
69
62
55
53
76
59
SEG
9
SEG
8
SEG
7
SEG
6
SEG
5
SEG
4
SEG
3
SEG
2
SEG
1
SEG
0
V
CC
V
REF
AV
SS
COM
3
COM
2
COM
1
COM
0
V
L3
V
L2
C
2
78
66
54
52
51
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
13
14
12
28
29
11
15
20
21
16
17
18
19
10
22
25
26
23
24
27
30
1
2
4
5
6
7
3
8
9
50
49
48
47
46
45
44
43
42
M38277M8MXXXFP
41
40
39
38
37
36
35
34
33
32
31
P1
6
P1
7
P2
0
P2
1
P2
2
P2
3
P2
4
P2
5
P2
6
P2
7
V
SS
X
OUT
X
IN
X
COUT
X
CIN
RESET
P7
0
/INT
0
P7
1
P7
2
P7
3
Package type : 100P6S-A (100-pin plastic-molded QFP)
Fig. 1 M38277M8MXXXFP pin configuration
C
1
V
L1
P6
7
/AN
7
P6
6
/AN
6
P6
5
/AN
5
P6
4
/AN
4
P6
3
/S
CLK22
/AN
3
P6
2
/S
CLK21
/AN
2
P6
1
/S
OUT2
/AN
1
P6
0
/S
IN2
/AN
0
P5
7
/DA
2
P5
6
/DA
1
P5
5
/CNTR
1
P5
4
/CNTR
0
P5
3
/RTP
1
P5
2
/RTP
0
P5
1
/PWM
1
P5
0
/PWM
0
P4
7
/S
RDY1
P4
6
/S
CLK1
P4
5
/T
X
D
P4
4
/R
X
D
P4
3
/φ/T
OUT
P4
2
/INT
2
P4
1
/INT
1
P4
0
/ADT
P7
7
P7
6
P7
5
P7
4
MITSUBISHI MICROCOMPUTERS
3827 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
PIN CONFIGURATION (TOP VIEW)
SEG
13
SEG
14
SEG
15
SEG
16
SEG
17
P3
0
/SEG
18
P3
1
/SEG
19
P3
2
/SEG
20
P3
3
/SEG
21
P3
4
/SEG
22
P3
5
/SEG
23
P3
6
/SEG
24
P3
7
/SEG
25
P0
0
/SEG
26
P0
1
/SEG
27
P0
2
/SEG
28
P0
3
/SEG
29
P0
4
/SEG
30
P0
5
/SEG
31
P0
6
/SEG
32
P0
7
/SEG
33
P1
0
/SEG
34
P1
1
/SEG
35
P1
2
/SEG
36
P1
3
/SEG
37
73
70
67
64
61
58
55
74
71
68
65
62
59
56
75
72
69
66
63
60
57
54
53
52
SEG
12
SEG
11
SEG
10
SEG
9
SEG
8
SEG
7
SEG
6
SEG
5
SEG
4
SEG
3
SEG
2
SEG
1
SEG
0
V
CC
V
REF
AV
SS
COM
3
COM
2
COM
1
COM
0
V
L3
V
L2
C
2
C
1
V
L1
51
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
21
23
24
16
17
10
11
13
18
20
12
14
15
19
22
25
3
6
2
5
1
4
7
8
9
50
49
48
47
46
45
44
43
42
41
40
39
M38277M8MXXXGP
M38277M8MXXXHP
38
37
36
35
34
33
32
31
30
29
28
27
26
P1
4
/SEG
38
P1
5
/SEG
39
P1
6
P1
7
P2
0
P2
1
P2
2
P2
3
P2
4
P2
5
P2
6
P2
7
V
SS
X
OUT
X
IN
X
COUT
X
CIN
RESET
P7
0
/INT
0
P7
1
P7
2
P7
3
P7
4
P7
5
P7
6
Package type : GP........ 100P6Q-A (100-pin plastic-molded LQFP)
Package type : HP ........ 100PFB-A (100-pin plastic-molded TQFP)
Fig. 2 M38277M8MXXXGP/M38277M8MXXXHP pin configuration
2
P6
7
/AN
7
P6
6
/AN
6
P6
5
/AN
5
P6
4
/AN
4
P6
3
/S
CLK22
/AN
3
P6
2
/S
CLK21
/AN
2
P6
1
/S
OUT2
/AN
1
P6
0
/S
IN2
/AN
0
P5
7
/DA
2
P5
6
/DA
1
P5
5
/CNTR
1
P5
4
/CNTR
0
P5
3
/RTP
1
P5
2
/RTP
0
P5
1
/PWM
1
P5
0
/PWM
0
P4
7
/S
RDY1
P4
6
/S
CLK1
P4
5
/ T
X
D
P4
4
/R
X
D
P4
3
/φ/T
OUT
P4
2
/INT
2
P4
1
/INT
1
P4
0
/ADT
P7
7
FUNCTIONAL BLOCK DIAGRAM
Main clock input
Reset input
RESET
V
CC
V
SS
(5V)
(0V)
Main clock output
X
IN
X
OUT
DA
2
DA
1
INT
0
SI/O2(8)
CNTR
0
,CNTR
1
ADT
INT
1,
INT
2
P5(8)
P4(8)
φ
P7(8)
P6(8)
P3(8)
Real time port function
X
CIN
X
COUT
V
REF
AV
SS
Sub-clock input
I/O port P7
I/O port P6
I/O port P5
I/O port P4
Output port P3
I/O port P2
Key input/key-on wake-up interrupt
Fig. 3 Functional block diagram
Data bus
C P U
A
ROM
X
Y
S
PC
H
Timer X(16)
Timer Y(16)
D-A2
D-A1
Clock generating circuit
RAM
V
L1
C
1
C
2
V
L2
V
L3
X
CIN
Sub-clock input
X
COUT
φ
LCD display
RAM
(20 bytes)
Sub-clock output
LCD drive
control circuit
COM
0
COM
1
COM
2
COM
3
PC
L
PS
Timer 1(8)
Timer 3(8)
Timer 2(8)
Watchdog timer
Reset
A-D converter
(10)
PWM(8)
SI/O1 (8)
T
OUT
SEG
0
SEG
1
SEG
2
SEG
3
SEG
4
SEG
5
SEG
6
SEG
7
SEG
8
SEG
9
SEG
10
SEG
11
SEG
12
SEG
13
SEG
14
SEG
15
SEG
16
SEG
17
P2(8)
P1(8)
P0(8)
X
COUT
X
CIN
I/O port P1
I/O port P0
3827 Group
Sub-clock output
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
3
MITSUBISHI MICROCOMPUTERS
3827 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
PIN DESCRIPTION
Table 1 Pin description (1)
Pin
V
CC
, V
SS
V
REF
AV
SS
Name
Power source
Analog refer-
ence voltage
Analog power
source
Reset input
Clock input
Clock output
LCD power
source
Charge-pump
capacitor pin
Common output
Function
•Apply voltage of 2.2 V to 5.5 V to V
CC
, and 0 V to V
SS
.
•Reference voltage input pin for A-D converter and D-A converter.
•GND input pin for A-D converter and D-A converter.
•Connect to V
SS
.
•Reset input pin for active “L”.
•Input and output pins for the main clock generating circuit.
•Connect a ceramic resonator or a quartz-crystal oscillator between the X
IN
and X
OUT
pins to set
the oscillation frequency.
•If an external clock is used, connect the clock source to the X
IN
pin and leave the X
OUT
pin open.
•Input 0
≤
V
L1
≤
V
L2
≤
V
L3
≤
V
CC
voltage.
•Input 0 – V
L3
voltage to LCD.
•External capacitor pins for a voltage multiplier (3 times) of LCD contorl.
•LCD common output pins.
•COM
2
and COM
3
are not used at 1/2 duty ratio.
•COM
3
is not used at 1/3 duty ratio.
SEG
0
–SEG
17
P0
0
/SEG
26
–
P0
7
/SEG
33
Segment output
I/O port P0
•LCD segment output pins.
•8-bit output port.
•CMOS compatible input level.
•CMOS 3-state output structure.
•Pull-up control is enabled.
•I/O direction register allows each port to be individually
programmed as either input or output.
P1
0
/SEG
34
–
P1
5
/SEG
39
I/O port P1
•6-bit output port with same function as port P0.
•CMOS compatible input level.
•CMOS 3-state output structure.
•Pull-up control is enabled.
•I/O direction register allows each 6-bit pin to be pro-
grammed as either input or output.
P1
6
, P1
7
•2-bit I/O port.
•CMOS compatible input level.
•CMOS 3-state output structure.
•I/O direction register allows each pin to be individually programmed as either input or output.
•Pull-up control is enabled.
•8-bit I/O port with same function as port P0.
•Key input (key-on wake-up) interrupt
input pins
•CMOS compatible input level.
•CMOS 3-state output structure.
•Pull-up control is enabled.
P3
0
/SEG
18
–
P3
7
/SEG
25
Output port P3
•8-bit output port with same function as port P0.
•CMOS 3-state output structure.
•Port output control is enabled.
•LCD segment output pins
•LCD segment output pins
Function except a port function
RESET
X
IN
X
OUT
V
L1
–V
L3
C
1
, C
2
COM
0
–COM
3
P2
0
– P2
7
I/O port P2
4
MITSUBISHI MICROCOMPUTERS
3827 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Table 2 Pin description (2)
Pin
P4
0
/ADT
Name
I/O port P4
Function
•1-bit I/O port with same function as P1
6
and P1
7
.
•CMOS compatible input level.
•CMOS 3-state output structure.
•7-bit I/O port with same function as P1
6
and P1
7
.
•CMOS compatible input level.
•CMOS 3-state output structure.
•Pull-up control is enabled.
Function except a port function
•A-D trigger input pin
•Interrupt input pin
•Interrupt input pins
•φ clock output pin
•Timer 2 output pin
•Serial I/O1 I/O pins
P4
1
/INT
1
,
P4
2
/INT
2
P4
3
/φ/T
OUT
P4
4
/R
X
D,
P4
5
/T
X
D,
P4
6
/S
CLK1
,
P4
7
/S
RDY1
P5
0
/PWM
0
,
P5
1
/PWM
1
P5
2
/RTP
0
,
P5
3
/RTP
1
P5
4
/CNTR
0
,
P5
5
/CNTR
1
P5
6
/DA
1
,
P5
7
/DA
2
P6
0
/AN
0
/S
IN2,
I/O port P6
P6
1
/AN
1
/S
OUT2,
P6
2
/AN
2
/S
CLK21,
P6
3
/AN
3
/S
CLK22
P6
4
/AN
4
–
P6
7
/AN
7
P7
0
/INT
0
P7
1
–P7
7
Input port P7
I/O port P7
I/O port P5
•8-bit I/O port with same function as P1
6
and P1
7
.
•CMOS compatible input level.
•CMOS 3-state output structure.
•Pull-up control is enabled.
•PWM function pins
•Real time port function pins
•Timer X, Y function pins
•D-A conversion output pins
•8-bit I/O port with same function as P1
6
and P1
7
.
•CMOS compatible input level.
•CMOS 3-state output structure.
•Pull-up control is enabled.
•A-D conversion input pins
•Serial I/O2 I/O pins
•A-D conversion input pins
•1-bit I/O port.
•CMOS compatible input level.
•7-bit I/O port with same function as P1
6
and P1
7
.
•CMOS compatible input level.
•N-channel open-drain output structure.
•Interrupt input pin
X
COUT
X
CIN
Sub-clock output
Sub-clock input
•Sub-clock generating circuit I/O pins.
(Connect a resonator. External clock cannot be used.)
5
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