MITSUBISHI MICROCOMPUTERS
4282 Group
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
DESCRIPTION
• Timer
Timer 1 ................................................................... 8-bit timer
(This has a reload register and carrier wave output auto-control
function)
Timer 2 ................................................................... 8-bit timer
(This has two reload registers and carrier wave output function)
• Logic operation function (XOR, OR, AND)
• RAM back-up function
• Key-on wakeup function (ports D4–D7, E0–E2, G0–G3) .... 11
• I/O port (ports D, E, G, CARR) .......................................... 16
• Oscillation circuit ..................................... Ceramic resonance
• Watchdog timer
• Power-on reset circuit
• Voltage drop detection circuit ......................... Typical:1.50 V
(system reset)
The 4282 Group enables fabrication of 8 × 7 key matrix and has
the followin timers;
• an 8-bit timer which can be used to set each carrier wave and
has two reload register
• an 8-bit timer which can be used to auto-control and has a
reload register.
FEATURES
• Number of basic instructions ............................................. 68
• Minimum instruction execution time ............................ 8.0 µs
(at f(XIN) = 4.0 MHz, system clock = f(XIN)/8)
• Supply voltage ................................................. 1.8 V to 3.6 V
• Subroutine nesting ..................................................... 4 levels
APPLICATION
Various remote control transmitters
Product
ROM (PROM) size
(× 9 bits)
1024 words
M34282M1-XXXGP
M34282M2-XXXGP
2048 words
M34282E2GP
2048 words
RAM size
(× 4 bits)
Package
ROM type
48 words
20P2E/F-A
Mask ROM
64 words
64 words
20P2E/F-A
Mask ROM
20P2E/F-A
One Time PROM
PIN CONFIGURATION (TOP VIEW)
1
20
VDD
E2
2
19
CARR
E1
3
18
D0
XIN
4
17
D1
XOUT
5
16
D2
E0
6
15
D3
G0
7
14
D4
G1
8
13
D5
G2
9
12
D6
G3
10
11
D7
M34282Mx-XXXGP
VSS
Outline 20P2E/F-A
