455A Datasheet, PDF (1/148 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

455A Group
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
REJ03B0224-0101
Rev.1.01
Feb 15, 2008
DESCRIPTION
The 455A Group is a 4-bit single-chip microcomputer designed
with CMOS technology. Its CPU is that of the 4500 Series using
a simple, high-speed instruction set. The computer is equipped
with two 8-bit timers (each timer has one or two reload registers),
a 16-bit timer for clock count, interrupts, and oscillation circuit
switch function.
The various microcomputers in the 455A Group include
variations of type as shown in the table below.
FEATURES
• Minimum instruction execution time..............................0.5 µs
(at 6 MHz oscillation frequency, in high-speed through-mode)
• Supply voltage .......................................................1.8 to 5.5 V
(It depends on operation source clock, oscillation frequency
and operation mode)
• Timers
Timer 1 ..............................................................8-bit timer with
a reload register and carrier wave output auto-control function
Timer 2............................. 8-bit timer with two reload registers
and carrier wave generation circuit
Timer 3........................ 16-bit timer (fixed dividing frequency)
• Interrupt ..................................................................... 4 sources
• Key-on wakeup function pins .............................................. 24
• I/O ports ............................................................................... 24
• Output ports ........................................................................... 1
• LCD control circuit
Segment output ..................................................................... 32
Common output ...................................................................... 4
• Voltage drop detection circuit
Reset occurrence..................................Typ. 1.7 V (Ta = 25 °C)
Reset release ........................................Typ. 1.8 V (Ta = 25 °C)
Skip occurrence ...................................Typ. 2.0 V (Ta = 25 °C)
• Power-on reset circuit
• Watchdog timer
• Clock generating circuit
Built-in clock (high-speed/low-speed on-chip oscillator)
Main clock (ceramic resonator)
Sub-clock (quartz-crystal oscillation)
• LED drive directly enabled (port D)
APPLICATION
Remote control transmitter
Table 1 Support Product
Part number
M3455AG8FP (Note 1)
M3455AG8-XXXFP
M3455AGCFP (Note 1)
M3455AGC-XXXFP
Note1.Shipped in blank
ROM size (× 10 bits)
8192 words
12288 words
RAM size (× 4 bits)
512 words
Package
PLQP0052JA-A
ROM type
QzROM
Rev.1.01 Feb 15, 2008 Page 1 of 146
REJ03B0224-0101