TLCS-870 series single chip microcomputer structure and application

Toshiba's TLCS-870 series microcontrollers are high-performance 8-bit microcontrollers. There are dozens of types of this system product, which have the same CPU module and instruction system, and each type has a cheap mask ROM and one-time programmable OTP.

The TLCS-870 series products are a class of single-chip microcomputers with powerful functions, which can be widely used in industrial control, household circuits, instruments and meters, office equipment, energy communication and transportation. This article briefly introduces the structure, performance and practical application of the TLCS-870 series products. Figure 1 shows the naming rules of the TLCS-870 series single-chip microcomputers. Table 1 shows the functions and packaging forms of the TMP87C800/H00L single-chip microcomputer.

1 Structure

The various models in the TLCS-870 series of microcontrollers have basically the same structure. They all have the same standard CPU module, but other internal resources vary with the model. The program memory capacity of the system microcontroller is generally 4kB~60kB, the RAM is 256b~2kB, the I/O port line has a maximum of 90 bits, and special I/O modules such as serial ports, multi-function timers/counters, A/D converters, LCD liquid crystal drivers, LED light-emitting display drivers, VFT fluorescent display drivers, OSD screen displays, etc. have different functional selection modules according to the different models of each microcontroller.

Table 1 Functions and packaging forms of H00/H00L type microcontrollers

Figure 2 shows the structural block diagram of the standard product of the TLCS-870 series microcontroller - TMP87C800/H00, and Figure 3 is the pin diagram of its dual-row package form.

2. Features

The TMP87C800/00 standard microcontroller is a representative product in the TLCS-870 series. It has fast speed and powerful functions. It contains a CPU core module, ROM program memory, RAM data memory and 4 multi-function timers/counters.

In addition, the TMP87C800/H00/H00L microcontroller also has the following features:

●It is a dual-clock 8-bit microcontroller;

●Its typical instruction cycle is 0.5μs (8MHz) and 122μs (32.768kHz);

●15 interrupt sources (6 external, 9 internal);

●There are 8 parallel ports (58-bit I/O lines);

●There are 2 16-bit multi-function timers/counters and 2 8-bit multi-function timers/counters;

●The interrupt frequency of the basic timer is 1 to 16kHz;

●One frequency-divided pulse output (frequency is 1～8kHz);

● Seal system monitoring timer;

●With 2 clock synchronous serial ports;

●There are 5 power saving modes: stop mode STOP, slow clock mode SLOW, idle mode IDEL1, IDEL2 and sleep mode SLEEP.

●In addition to the TMP87C800/H00/H00L microcontrollers, the TLCS-870 series of microcontrollers also include the TMP408M/N microcontrollers, TMP87CC20F/H20F/K20AF/M20AF/TMP87CM36, TMP87C840/C40/H40/M40A, TMP87C841/C41/H41/K41/M41, TMP87C447/847/H47/H47L and TMP87CC70/H70/K74A/M70A, etc. Their functions, packaging and structural block diagrams are basically similar.

3 Development Tools

Toshiba can provide users with the RTE series of real-time simulation systems to develop various single-chip microcomputers and microprocessors. Among them, RTE Model 10 is the RTE 870 series, which can support real-time online debugging of the software and hardware of the TLCS-870 series single-chip microcomputer application system. The system consists of a simulation controller, a simulation box/simulation connection plug and a system host. Any microcomputer compatible with MS-DOS can be used as a host, such as Toshiba's T3100 series, IBM and XT/AT. If a T3100 series microcomputer with 2M bytes of extended memory is used, the assembly and compilation time can be greatly shortened.

The RTE real-time simulation series can provide users with some software that can run on the host, including C-Like compilation, relocatable assembly and debugging software. [page]

4 Application of TLCS-870 series microcontroller

The TLCS-870 series of single-chip microcomputers are powerful single-chip microcomputers that can be widely used in industrial control, instrumentation, household appliances, etc. The following are some single-chip microcomputer models that can be selected in practical applications.

In automotive electronics, models such as TMP87CX40IN/IF/WN and TMP87CX47IUN can be selected.

For televisions, models such as TMP87CX31N/36N/37N/38N/39N can be selected.

The models used for audio are: TMP87CX14, TMP87CX70 and TMP87C20;

In terms of cordless phones, the available models include: TMP87C447U, TMP87C847U and TMP87C408M/N devices.

For household appliances such as washing machines and refrigerators, models such as TMP87CX40N/41N/46N and TMP87CN70 (X=8, H, K) can be selected.

Two circuit diagrams for practical applications are given below.

4.1 Fully automatic fuzzy control washing machine

FIG4 shows a block diagram of a controller circuit of a fully automatic fuzzy washing machine. The following functions can be realized by using this circuit:

(1) Fully automatic from washing to dehydration;

(2) Automatically control the water flow rate and washing time to suit different fabrics and different levels of oil stains;

(3) Automatically control rinsing according to water clarity.

The controller circuit of the fully automatic fuzzy control washing machine can use a single chip microcomputer with an internal A/D converter such as TMP87CH40H, TMP87CK41N or TMP87CH46N.

4.2 Bus-controlled color TV

The color TV controller, which is composed of TMPC87CX31N/36N/37N/38N/39N microcontrollers with I2C serial bus interface and OSD screen display control function and I2C bus devices, has the characteristics of simple structure and powerful functions.

Figure 5 shows the principle block diagram of an actual bus-type color TV controller.