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PDF HD404654H Data sheet ( Hoja de datos )
| Número de pieza | HD404654H | |
| Descripción | 4-Bit Single-Chip Microcomputer | |
| Fabricantes | Hitachi Semiconductor | |
| Logotipo |  |
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HD404654 Series
4-Bit Single-Chip Microcomputer
Rev. 7.0
Sept. 1999
Description
The HD404654 Series is a member of the HMCS400-series of microcomputers designed to increase
program productivity with large-capacity memory. Each microcomputer has a high-precision dual-tone
multi-frequency (DTMF) generator, three timers, serial interface, voltage comparator, and input capture
circuit.
The HD404654 Series includes three chips: the HD404652 with 2 k-word ROM; the HD404654 with 4 k-
word ROM; and the HD4074654 with 4 k-word PROM (ZTAT™ version).
The HD4074654 is a PROM version (ZTAT™ microcomputer). A program 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 ZTAT™ version is 27256-compatible.)
ZTAT™ : Zero Turn Around Time. ZTAT is a trademark of Hitachi Ltd.
Features
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• 27 I/O pins and 5 dedicated input pins
10 high-current output pins: Six 15-mA sinks and four 10-mA sources
• Three timer/counters
• Eight-bit input capture circuit
• Two timer outputs (including two PWM outputs)
• One event counter input (including one double-edge function)
• One clock-synchronous 8-bit serial interface
• Voltage comparator (2 channels)
• On-chip DTMF generator (fOSC = 400 kHz, 800 kHz, 2 MHz, 3.58 MHz or 4 MHz)
• Built-in oscillators
Main clock: Ceramic or crystal oscillator (an external clock is also possible)
• Six interrupt sources
Two by external sources
Four by internal sources
• Subroutine stack up to 16 levels, including interrupts
1 page  
Block Diagram
HD404654 Series
INT0
INT1
External
interrupt
Timer
A
TOC
EVND
TOD
SI1
SO1
SCK1
VCref
COMP0
COMP1
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VTref
TONER
TONEC
Timer
C
Timer
D
SCI1
Compa-
rator
DTMF
System control
RAM
(512 × 4 bits)
W (2 bits)
X (4 bits)
SPX (4 bits)
Y (4 bits)
SPY (4 bits)
ALU
CPU
ST CA
(1 bit) (1 bit)
A (4 bits)
B (4 bits)
SP (10 bits)
Instruction
decoder
PC (14 bits)
ROM
(4,096 × 10 bits)
(2,048 × 10 bits)
D0
D1
D2
Source
D3
D4
D5
D6
D7
Sink
High
current
pins
D8
D9
D12
D13
R00
R10
R11
R12
R13
R2 0
R2 1
R2 2
R2 3
R3 0
R3 1
R3 2
R3 3
R4 0
R4 1
R4 2
R4 3
RD0
RD1
RE0
: Data bus
: Signal line
5
5 Page 
HD404654 Series
Memory registers
64 MR(0) $040
65 MR(1) $041
66 MR(2) $042
67 MR(3) $043
68 MR(4) $044
69 MR(5) $045
70 MR(6) $046
71 MR(7) $047
72 MR(8) $048
73 MR(9) $049
74 MR(10) $04A
75 MR(11) $04B
76 MR(12) $04C
77 MR(13) $04D
78 MR(14) $04E
79 MR(15) $04F
Stack area
960 Level 16
Level 15
Level 14
Level 13
Level 12
Level 11
Level 10
Level 9
Level 8
Level 7
Level 6
Level 5
1023
Level 4
Level 3
Level 2
Level 1
$3C0
$3FF
Bit 3
1020 ST
1021 PC10
1022 CA
1023 PC3
Bit 2
PC13
PC9
PC6
PC2
Bit 1
PC12
PC8
PC5
PC1
Bit 0
PC11
PC7
PC4
PC0
$3FC
$3FD
$3FE
$3FF
PC13–PC0 : Program counter
ST: Status flag
CA: Carry flag
Figure 6 Configuration of Memory Registers and Stack Area, and Stack Position
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11
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| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet HD404654H.PDF ] | |
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