
1
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
PRELIMINAR
Y
Notice:
This
is not
a final
specification.
Som
e param
etric
lim
its are
subject
to change.
3822 Group (A ver.)
DESCRIPTION
The 3822 group (A version) is the 8-bit microcomputer based on
the 740 family core technology.
The 3822 group (A version) has the LCD drive control circuit, an 8-
channel A-D converter, and a serial I/O as additional functions.
The various microcomputers in the 3822 group (A version) include
variations of internal memory size and packaging. For details, re-
fer to the section on part numbering.
FEATURES
qBasic machine-language instructions ...................................... 71
qThe minimum instruction execution time ........................... 0.4 s
(at f(XIN) = 10 MHz, High-speed mode)
qMemory size
ROM ............................................................... 16 K to 48 K bytes
RAM ................................................................. 512 to 1024 bytes
qProgrammable input/output ports ............................................ 49
qSoftware pull-up/pull-down resistors (Ports P0-P7 except port P40)
qInterrupts ................................................. 17 sources, 16 vectors
(includes key input interrupt)
qTimers ........................................................... 8-bit 3, 16-bit 2
qSerial I/O ...................... 8-bit 1 (UART or Clock-synchronized)
qA-D converter ................................................. 8-bit 8 channels
qLCD drive control circuit
Bias ................................................................................... 1/2, 1/3
Duty ........................................................................... 1/2, 1/3, 1/4
Common output .......................................................................... 4
Segment output ........................................................................ 32
q2 clock generating circuits
(connect to external ceramic resonator or quartz-crystal oscillator)
qPower source voltage
In high-speed mode
(at f(XIN)
≤ 10 MHz) ................................................... 4.5 to 5.5 V
(at f(XIN)
≤ 8 MHz) ..................................................... 4.0 to 5.5 V
In middle-speed mode (at f(XIN)
≤ 6 MHz) ............... 1.8 to 5.5 V
In low-speed mode .................................................... 1.8 to 5.5 V
qPower dissipation
In high-speed mode ................................................ 15 mW (std.)
(at f(XIN) = 8 MHz, Vcc = 5 V, Ta = 25 °C)
In low-speed mode ................................................... 24
W (std.)
(at f(XIN) stopped, f(XCIN) = 32 kHz, Vcc = 3 V, Ta = 25 °C)
qOperating temperature range .................................. – 20 to 85 °C
APPLICATIONS
Camera, household appliances, consumer electronics, etc.
Fig. 1 M3822XMXA-XXXFP pin configuration
PIN CONFIGURATION (TOP VIEW)
Package type : 80P6N-A (80-pin plastic-molded QFP)
S
E
G
8
S
E
G
9
P
3
4
/S
E
G
1
2
P
3
5
/S
E
G
1
3
P
0
/S
E
G
1
6
P
0
3
/S
E
G
1
9
P
0
4
/S
E
G
2
0
P
0
5
/S
E
G
2
1
P
0
6
/S
E
G
2
P
0
7
/S
E
G
2
3
P
1
/S
E
G
2
5
P
1
2
/S
E
G
2
6
P
1
3
/S
E
G
2
7
P
1
4
/S
E
G
2
8
P
1
5
/S
E
G
2
9
P
1
6
/S
E
G
3
0
P
1
7
/S
E
G
3
1
V
L
1
P
6
7
/A
N
7
M3822XMXA-XXXFP
P
5
7
/A
D
T
P
5
0
/I
N
T
2
P
4
6
/S
C
L
K
P
4
5
/T
X
D
P
4
3
/I
N
T
1
P
4
2
/I
N
T
0
AVSS
VREF
VCC
SEG0
P41/
φ
P40
XIN
XOUT
VSS
P27
P26
P25
P24
P23
P22
P21
P20
RESET
P
5
1
/I
N
T
3
P
5
/C
N
T
R
1
P
5
4
/C
N
T
R
0
P
5
3
/R
T
P
1
P
5
2
/R
T
P
0
P
5
6
/T
O
U
T
P
1
0
/S
E
G
2
4
P
0
1
/S
E
G
1
7
P
0
2
/S
E
G
1
8
P
4
7
/S
R
D
Y
S
E
G
1
0
S
E
G
1
P
3
6
/S
E
G
1
4
P
3
7
/S
E
G
1
5
P70/XCOUT
P71/XCIN
COM0
VL3
P
6
/A
N
6
P
6
5
/A
N
5
P
6
4
/A
N
4
P
6
3
/A
N
3
P
6
2
/A
N
2
P
6
1
/A
N
1
P
6
0
/A
N
0
V
L
2
COM1
COM2
COM3
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
P
4
/R
X
D
1
2
3 4
56789 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80