NEC PD750008 - Manual (Page 21)

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CHAPTER 1 GENERAL
CHAPTER 1 GENERAL
The µPD750004, µPD750006, µPD750008, and µPD75P0016 are 75XL series 4-bit single-chip microcom-
puters. The 75XL series is a successor of the 75X series consisting of many products. These µPD750004,
µPD750006, µPD750008, and µPD75P0016 are collectively called the µPD750008 subseries.
The 75XL series takes over the CPUs of the 75X series, realizing a wide range of operating voltages and
high-speed operation. In addition to having upward compatibility with existing products, the 75XL series is
best suited for battery-driven applications.
The µPD750004, µPD750006, µPD750008, and µPD75P0016 have the following features:
• Operable on low voltage: V
DD
= 2.2 to 5.5 V
• Switchable instruction execution times (useful for high-speed operation and power saving)
0.95 µs, 1.91 µs, 3.81 µs, 15.3 µs (at 4.19 MHz)
0.67 µs, 1.33 µs, 2.67 µs, 10.7 µs (at 6.0 MHz)
122 µs (at 32.768 kHz)
• Enhanced timers: 4 channels
• Easy replacement (The functions and instructions of the µPD75008 are taken over.)
The 75XL series comes in four models, according to the size and type of program memory (see
Table 1-1).
Table 1-1. Features of the Products
Model Program memory (ROM) Remarks
µPD750004 4096 x 8 bits Masked ROM
µPD750006 6144 x 8 bits
µPD750008 8192 x 8 bits
µPD75P0016 16384 x 8 bits One-time PROM
The µPD75P0016, having the electrically programmable one-time PROM, is pin-compatible with the
µPD750004, µPD750006, and µPD750008. It is suitable for small-scale production or prototype production
in system development.
Applications
• Consumer electronics
VCR, audio equipment (such as CD players), remote controller, etc.
• Others
Telephone, camera, etc.
Remark This manual will explain only the µPD750008 when the µPD750008, µPD750004,
µPD750006, and µPD75P0016 are functionally the same. Users of the µPD750004, µPD750006,
or µPD75P0016 should read µPD750008 as referring to µPD750004, µPD750006, or µPD75P0016.
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