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

455A Group
PERFORMANCE OVERVIEW
Table 2 Performance overview
Parameter
Number of basic instructions
Minimum instruction execution time
Memory sizes
ROM
M3455AG8
M3455AGC
RAM
I/O port
D0−D5
I/O
(Input is
examined by
skip decision.)
D6, D7
I/O
(Input is
examined by
skip decision.)
P00−P03 I/O
P10−P13 I/O
P20−P23 I/O
P30−P33 I/O
Timer
C
Timer 1
Output
Timer 2
Timer 3
Timer LC
Watchdog timer
LCD control circuit ^{Selective bias value}
Selective duty value
Common output
Segment output
Internal resistor for power
supply
Voltage drop
detection circuit
Reset occurrence
Reset release
Skip occurrence
Power-on reset circuit
Interrupt
Source
Nesting
Subroutine nesting
Device structure
Package
Operating temperature range
Power source voltage
Power At active mode
dissipation
(Typ. value) _{At clock operating mode}
At RAM back-up
Function
138
0.5 µs (Oscillation frequency 6 MHz: high-speed through mode)
8192 words × 10 bits
12288 words × 10 bits
512 words × 4 bits (including LCD display RAM 32 words × 4 bits)
Six independent I/O ports. A pull-up function, a key-on wakeup function and output
structure can be switched by software.
Port D5 is also used as INT pin.
Two independent I/O ports; each pin is equipped with a pull-up function and a key-on
wakeup function. Both functions can be switched by software.
Ports D6 and D7 are also used as XCIN and XCOUT, respectively.
4-bit I/O port; A pull-up function, a key-on wakeup function and output structure can
be switched by software.
Ports P00−P03 are also used as SEG16−SEG19, respectively.
4-bit I/O port; A pull-up function, a key-on wakeup function and output structure can
be switched by software.
Ports P10−P13 are also used as SEG20−SEG23, respectively.
4-bit I/O port; A pull-up function, a key-on wakeup function and output structure can
be switched by software.
Ports P20−P23 are also used as SEG24−SEG27, respectively.
4-bit I/O port; A pull-up function, a key-on wakeup function and output structure can
be switched by software.
Ports P30−P33 are also used as SEG28−SEG31, respectively.
1-bit output; Port C is also used as CNTR pin.
8-bit timer with a reload register and carrier wave output auto-control function, and
has an event counter.
8-bit timer with two reload registers and carrier wave generation function.
16-bit timer, fixed dividing frequency (timer for clock count)
4-bit programmable timer with a reload register (for LCD clock generating)
16-bit timer, fixed dividing frequency (timer for monitor)
1/2, 1/3 bias
2, 3, 4 duty
4
32
2r × 3, 2r × 2, r × 3, r × 2 (r = 100 kΩ, (Ta = 25 °C, Typical value))
Typ. 1.7 V (Ta=25 °C)
Typ. 1.8 V (Ta=25 °C)
Typ. 2.0 V (Ta=25 °C)
Built-in
4 sources (one for external, three for timers)
1 level
8 levels
CMOS silicon gate
52-pin plastic molded LQFP (PLQP0052JA-A)
-20 to 85 °C
1.8 to 5.5 V (It depends on operation source clock, oscillation frequency and
operation mode)
0.3 mA (Ta = 25 °C, VDD = 3.0 V, f(XIN) = 4 MHz, f(XCIN) = stop, f(HSOCO) = stop,
f(LSOCO)=stop, f(STCK) = f(XIN/8)
5 µA (Ta = 25 °C, VDD = 3.0 V, f(XCIN) = 32 kHz)
0.1 µA (Ta = 25 °C, output transistor is cut-off state)
Rev.1.01 Feb 15, 2008 Page 4 of 146
REJ03B0224-0101