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HD404652H Datasheet

  • HD404652H

  • 4-Bit Single-Chip Microcomputer

  • 109頁(yè)

  • HITACHI

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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鈩?version).
The HD4074654 is a PROM version (ZTAT鈩?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鈩?version is 27256-compatible.)
ZTAT鈩?: Zero Turn Around Time. ZTAT is a trademark of Hitachi Ltd.
Features
鈥?/div>
27 I/O pins and 5 dedicated input pins
錚?/div>
10 high-current output pins: Six 15-mA sinks and four 10-mA sources
鈥?/div>
Three timer/counters
鈥?/div>
Eight-bit input capture circuit
鈥?/div>
Two timer outputs (including two PWM outputs)
鈥?/div>
One event counter input (including one double-edge function)
鈥?/div>
One clock-synchronous 8-bit serial interface
鈥?/div>
Voltage comparator (2 channels)
鈥?/div>
On-chip DTMF generator (f
OSC
= 400 kHz, 800 kHz, 2 MHz, 3.58 MHz or 4 MHz)
鈥?/div>
Built-in oscillators
錚?/div>
Main clock: Ceramic or crystal oscillator (an external clock is also possible)
鈥?/div>
Six interrupt sources
錚?/div>
Two by external sources
錚?/div>
Four by internal sources
鈥?/div>
Subroutine stack up to 16 levels, including interrupts

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