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PDF HD404334 Data sheet ( Hoja de datos )
| Número de pieza | HD404334 | |
| Descripción | (HD404339 Series) 4-bit HMCS400-Series microcomputer | |
| Fabricantes | Hitachi Semiconductor | |
| Logotipo |  |
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HD404339 Series
Rev. 7.0
Sept. 1999
Description
The HD404339 Series is 4-bit HMCS400-Series microcomputer with large-capacity memory designed to
increase program productivity. Each microcomputer has an A/D converter, input capture timer, and a 32-
kHz oscillator circuit for clock use all built in. They also come with high-voltage I/O pins that can directly
drive a fluorescent display.
The HD404339 Series includes six chips: the HD404339 with 16-kword ROM; the HD4043312 with 12-
kword ROM; the HD404338 with 8-kword ROM; the HD404336 with 6-kword ROM; the HD404334 with
4-kword ROM; the HD4074339 with 16-kword PROM.
The HD4074339 is a PROM version ZTAT™ microcomputer. 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
• 54 I/O pins
One input-only pin
53 input/output pins: 30 pins are high-voltage pins (40 V, max.)
• On-chip A/D converter (8-bit × 12-channel)
• Three timers
One event counter input
One timer output
One input capture timer
• 8-bit clock-synchronous serial interface (1 channel)
• Alarm output
• Built-in oscillators
Ceramic or crystal oscillator
External clock drive is also possible
Subclock: 32.768-kHz crystal oscillator
1 page  
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Item
A/D converter
Symbol
AVCC
Pin Number
DP-64S FP-64B
32 26
I/O
AVSS
19
13
AN0–AN11 20–31 14–25 I
HD404339 Series
Function
Power supply for the A/D converter. Connect
this pin as close as possible to the VCC pin and at
the same voltage as VCC. If the power supply
voltage to be used for the A/D converter is not
equal to VCC, connect a 0.1-µF bypass capacitor
between the AVCC and AVSS pins. (However, this
is not necessary when the AVCC pin is directly
connected to the VCC pin.)
Ground for the A/D converter. Connect this pin
as close as possible to GND at the same voltage
as GND.
Analog input pins for the A/D converter
5
5 Page 
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Table 1 Initial Values of Flags after MCU Reset
Item
Interrupt flags/mask
Bit registers
Interrupt enable flag (IE)
Interrupt request flag (IF)
Interrupt mask (IM)
Watchdog timer on flag (WDON)
A/D start flag (ADSF)
Input capture status flag (ICSF)
Input capture error flag (ICEF)
IAD off flag (IAOF)
RAM enable flag (RAME)
Low speed on flag (LSON)
Direct transfer on flag (DTON)
HD404339 Series
Initial Value
0
0
1
0
0
0
0
0
0
0
0
RAM Address
$0000
Bit 3
IM0
(IM of INT0)
$0001
IMTA
(IM of timer A)
$0002
IMTC
(IM of timer C)
$0003
IMS
(IM of serial)
Bit 2
IF0
(IF of INT0)
IFTA
(IF of timer A)
IFTC
(IF of timer C)
IFS
(IF of serial)
Bit 1
RSP
(Reset SP bit)
IM1
(IM of INT1)
IMTB
(IM of timer B)
IMAD
(IM of A/D)
Bit 0
IE
(Interrupt
enable flag)
IF1
(IF of INT1)
IFTB
(IF of timer B)
IFAD
(IF of A/D)
Interrupt control bits area
$020
$021
IF: Interrupt
request flag
IM: Interrupt
$022
mask
IE: Interrupt
enable flag
$023
SP: Stack pointer
Bit 3
DTON
(Direct transfer
on flag)
RAME
(RAM enable
flag)
Bit 2
ADSF
(A/D start flag)
IAOF
(IAD off flag)
Bit 1
WDON
(Watchdog
on flag)
ICEF
(Input capture
error flag)
Not used
Register flag area
Bit 0
LSON
(Low speed
on flag)
ICSF
(Input capture
status flag)
Figure 3 Interrupt Control Bits and Register Flag Areas Configuration
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet HD404334.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| HD4043312 | (HD404339 Series) 4-bit HMCS400-Series microcomputer | Hitachi Semiconductor |
| HD404334 | (HD404339 Series) 4-bit HMCS400-Series microcomputer | Hitachi Semiconductor |
| HD404336 | (HD404339 Series) 4-bit HMCS400-Series microcomputer | Hitachi Semiconductor |
| HD404338 | (HD404339 Series) 4-bit HMCS400-Series microcomputer | Hitachi Semiconductor |
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