HMCS404AC
(HD614048)----
The HMCS404AC
is
a CMOS 4-bit single-chip microcomputer
which
is
a member
of
the HMCS400 series.
The
HMCS404AC
is
a high speed version
of
the HMCS404C.
The HMCS404AC has efficient and powerful architecture and
its software is very similar to the HMCS40 series.
This microcomputer provides variety
of
on-chip resources
such as ROM, RAM, 110,
two
timer/counters and a serial inter-
face to perform
in
wide users' applications.
The HMCS404AC also has the characteristics
of
high speed
and
low
power dissipation and which 110 pins are able to drive
fluorescent display tube directly.
• HARDWARE FEATURES
•
4-bit
Architecture
•
4,096
Words x
10-bit
ROM
•
256
Digits x
4-bit
RAM
•
58
I/O Pins, including
26
high voltage I/O pins (40V Max)
•
Two
Timer/Counters
11
-bit Prescaler
8-bit
Free
Running Timer
8-bit
Auto-Reload Timer/Event Counter
• Clock Synchronous
8-bit
Serial Interface
•
Five
Interrupt Sources
External 2
Timer/Counter
2
Serial Interface 1
• Subroutine Stack
Up
to
16
levels including interrupts
• High Speed Operation
Minimum Instruction Execution Time - 1.33
/Ls
•
Two
Low Power Dissipation Modes
Standby -
Stops instruction execution while keeping
clock oscillation and interrupt functions
in
op-
eration.
Stop
- Stops instruction execution and clock oscilla-
tion while retaining RAM data
• On-Chip Oscillator
External Connection
of
Crystal or Ceramic Filter (externally
drivable)
• SOFTWARE FEATURES
• Instruction Set Similar
to
and More Powerful than HMCS40
Series;
99
Instructions
• High Programming Efficiency
with
10-bit
ROM/Word;
79
in-
structions
are
single word instructions
• Direct Branch
to
All
ROM
Area
• Direct or Indirect Addressing
to
All RAM Area
• Subroutine Nesting Up
to
16
Levels Including Interrupts
• Binary and
BCD
Arithmetic Operation
• Powerful Logical Arithmetic Operation
• Pattern Generation - Table Look Up Capability -
• Bit Manipulation
for
Both RAM and I/O
HMCS404AC
(DP·64S)
HMCS404AC
(FP-64)
• VERSATILE PROGRAM DEVELOPMENT SUPPORT TOOLS
• H68SD Series Macro Assembler
• H68SD5-use Emulator (With
Real
Time Trace Function)
•
EPROM
On
Package Microcomputer
[
Mask
options are fixed
as
follows:
297
• I/O pin : Open drain
• Oscillator : Crystal Oscillator or
(externally drivable)
• Divider : Divided-by-8
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