HD404344R Series/HD404394 Series
Rev. 7.0
Sept. 1999
Description
The HD404344R series and HD404394 series 4-bit microcomputers are products of the HMCS400 series,
which is designed to make application systems compact while realizing higher performance and increasing
program productivity.
Each microcomputer has an A/D converter, two timers and a serial interface. The HD404344R series
includes the HD404344R with on-chip 4-kword ROM, HD404342R with 2-kword ROM, and HD404341R
with 1-kword ROM. The HD404394 series includes the HD404394 with on-chip 4-kword ROM,
HD404392 with 2-kword ROM, and HD404391 with 1-kword ROM.
The HD4074344 and HD4074394 are the PROM version ZTAT™ microcomputers. Programs can be
written to the PROM by a PROM writer, which can dramatically shorten system development periods and
smooth the process from debugging to mass production. (The PROM program specifications are the same
as for the 27256.)
ZTAT™: Zero Turn Around Time ZTAT is a Trademark of Hitachi Ltd.
Features
•
Input/output pins
HD404344R series, HD4074344: 22 pins
(10pins: Large-current I/O pins)
HD404394 series: 21 pins
(3 pins: intermediate-voltage NMOS open drain I/O; 5 pins: NMOS open drain I/O with 15-mA
high-current driver)
•
Two timer/counters
One timer output
One event counter input (with programmable edge detection)
•
8-bit clock-synchronous serial interface (1 channel)
•
On-chip A/D converter
HD404344R series, HD4074344: 8 bit
×
4 channel
HD404394 series: 8 bit
×
3 channel (with V
ref
pin)
•
Built-in oscillator
HD404344R Series/HD404394 Series
HD404344R Series
Ceramic oscillator, CR oscillation, External clock drive is also possible.
HD404394 Series, HD4074344
Ceramic oscillator, External clock drive is also possible.
•
Five interrupt sources
One by external source (with programmable edge detection)
Four by internal sources
•
Subroutine stack
Maximum 16 levels including interrupts
•
Two low-power dissipation modes
Standby mode
Stop mode
•
One input signal to return from stop mode
•
Instruction cycle time
1
µs
(f
OSC
= 4 MHz)
2
HD404344R Series/HD404394 Series
Type of Products
Product Name
Type
Mask ROM
HD404344R
Series
*1
HD404341RS
HD40C4341RS
HD404342RS
HD40C4342RS
HD404344RS
HD40C4344RS
HD404341RFP
HD40C4341RFP
HD404342RFP
HD40C4342RFP
HD404344RFP
HD40C4344RFP
HD404341RFT
HD40C4341RFT
HD404342RFT
HD40C4342RFT
HD404344RFT
HD40C4344RFT
HCD404344R
HCD40C4344R
ZTAT™
HD4074344S
HD4074344FP
HD4074344FT
Note:
HD4074394S
HD4074394FP
HD4074394FT
4,096
DP-28S
FP-28DA
FP-30D
——
4,096
Chip
*
3
*4
HD404394FT
4,096
HD404392FT
2,048
HD404391FT
1,024
FP-30D
HD404394FP
4,096
HD404392FP
2,048
HD404391FP
1,024
FP-28DA
HD404394S
4,096
HD404392S
2,048
HD404394
Series
HD404391S
ROM (words)
1,024
RAM (digit)
256
Package
DP-28S
1. The HD404344R Series is available in a mask ROM version only.
2. ZTAT™ chip shipment is not supprted.
3. The specifications of shipped chips differ from those of the package product. Please contact our
sales staff for details.
3
HD404344R Series/HD404394 Series
List of Functions
Mask ROM
item
Operating voltage (V)
Instruction cycle time (typ.)
HD404341R
2.5 to 5.5
1
µs
(f
osc
= 4.0
MHz)
ROM (Words)
RAM (Digits)
I/O
High-current
I/O pins (Sink
15 mA max)
Timer
functions
Free running
timer
Reload timer
2
2
1
1
2
1
1
2
1
1
2
1
1
2
1
1
2
1
1
2
2
2
2
2
2
2
1,024
256
22
10
HD404342R
2.5 to 5.5
1
µs
(f
osc
= 4.0
MHz)
2.048
256
22
10
HD404344R
2.5 to 5.5
1
µs
(f
osc
= 4.0
MHz)
4,096
256
22
10
HCD404344R HD40C4341R HD40C4342R HD40C4344R
2.5 to 5.5
1
µs
(f
osc
= 4.0
MHz)
4,096
256
22
10
1,024
256
22
10
2,048
256
22
10
4,096
256
22
10
2.5 to 5.5
2
µs
(R
f
= 20 kΩ)
2.5 to 5.5
2
µs
(R
f
= 20 kΩ)
2.5 to 5.5
2
µs
(R
f
= 20 kΩ)
Event counter 1
Watchdog
timer
Serial interface
A/D converter
Interrupt
External
Internal
Low-power modes
Stop mode
Standby mode
Oscillator
Ceramic
oscillation
RC oscillation
Package
—
DP-28S
FP-28DA
FP-30D
Guaranteed operation
temperature (°C)
–20 to +75
1
8bit
×
4ch
1
4
2
1
1
8bit
×
4ch
1
4
2
1
8bit
×
4ch
1
4
2
1
8bit
×
4ch
1
4
2
1
8bit
×
4ch
1
4
2
1
8bit
×
4ch
1
4
2
1
8bit
×
4ch
1
4
2
l
l
l
l
l
l
—
DP-28S
FP-28DA
FP-30D
–20 to +75
l
l
l
—
DP-28S
FP-28DA
FP-30D
–20 to +75
l
l
l
—
Chip
l
l
—
l
l
—
l
l
—
l
DP-28S
FP-28DA
FP-30D
l
DP-28S
FP-28DA
FP-30D
–20 to +75
l
DP-28S
FP-28DA
FP-30D
–20 to +75
+75
–20 to +75
4
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