Renesas公司的78K0/K2L是8位單片MCU,采用78K0兵CPU內核,工作電壓1.8V-5.5V,最大頻率10MHz,集成了4KB-16KB閃存和384B-768B RAM,適用于電池供電系統及節能家電領域，例如測量儀表、感測接口、煙霧傳感器、火災報警器、電動牙刷、剃須刀等。而采用采用78K0/K2L 8位MCU的帶藍牙連接數碼相框能很方便地從數碼相機,手機和PC中傳輸照片.本文介紹了8位MCU 78K0/K2L主要特性,方框圖, 入門板TK-78K0/KC2L主要特性以及數碼相框系統框圖和推薦使用的元器件.

Digital photo frames display digital photos, and their popularity is evident by the huge variety of such products now on the market. Recently, models with network functionality, such as Bluetooth or wireless LAN connectivity, have appeared. A digital photo frame with Bluetooth connectivity makes it easy to transfer photos wirelessly from digital cameras, mobile phones, and PCs, and the extra convenience that these products deliver is driving sales.

To facilitate new designs for digital photo frame applications, Renesas Electronics offers the 78K0/Kx2-L and R8C/3x Series of MCUs. We also supply peripheral devices such as USB controllers. The CB-40, 55, and 90 Series are recommended for the image processing component.

8位MCU 78K0/K2L主要特性:

Power supply voltage: VDD = 1.8 to 5.5 V

Max. frequency: 10 MHz

ROM capacities: 4 KB to 16 KB flash memory

RAM capacities: 384 bytes to 768 bytes

20-pin plastic SSOP package

78K0 CPU core

Low power consumption (VDD = 3.0 V)

- Internal high-speed oscillation mode: 260 µA (TYP.) (at fCPU = 1 MHz operation)

- STOP mode: 0.7 µA (TYP.) (at fIL = 30 kHz operation) Clock

- High-speed system clock ... Selected from the following three source

- Ceramic/crystal oscillator: 1 to 10 MHz

- External clock: 1 to 10 MHz

- Internal high-speed oscillator: 4 MHz ± 2 % (-20 to +70℃), or 8 MHz ± 5 %(-40 to +85℃)

- Low-speed system oscillator 30 kHz ± 10 % ... Watchdog timer, timer clock in intermittent operation

- Subsystem clock: Clock to operate the real-time counter mainly I/O ports:24 (CMOS I/O: 21, CMOS input: 3) Timer

- 16-bit timer/event counter ... Timer output, capture input: 1 channel

- 8-bit timer H ... PWM output: 1 channel

- 8-bit timer/event counter 5 ... PWM output, external event counter input: 1 chennel

- Watchdog timer ... Operable with low-speed internal oscillation clock: 1 chennel Serial interface

- UART ... Asynchronous 2-wire serial interface: 1 chennel

- IICA ... Clock synchronous 2-wire serial interface, multimaster supported, standby can be released upon address match in slave mode: 1 channel 10-bit resolution A/D conversion: 6 chennels Operational amplifier (products with operational amplifier only): 2 channels Power-on-clear (POC) circuit Low-voltage detector (LVI) (An interrupt/reset (selectable) is generated when the detection voltage is reached))

- Detection voltage: Selectable from sixteen levels between 1.91 and 4.22 V Single-power-supply flash memory

- Flash self programming enabled

- Software protection function: Protected from outside party copying (no flash reading command) Safety function

- Watchdog timer operated by clock independent from CPU ... A hang-up can be detected even if the system clock stops

- Supply voltage drop detectable by LVI ... Appropriate processing can be executed before the supply voltage drops below the operation voltage

- Equipped with option byte function ... Important system operation settings set in hardware On-chip debug function ... Available to control for the target device, and to reference memory Operating ambient temperature: TA = -40 to +85℃


圖1.20引腳MCU78K0/K2L方框圖

78K0/Kx2-L MCU入門板TK-78K0/KC2L

The TK-78K0/KC2L is a starter kit for 78K0/Kx2-L microcontrollers. This kit has the 78K0/KC2-L microcontroller mounted on the board and supports application program downloading and real-time execution. User hardware parts such as digital I/O and analog signals can be connected to the board.


圖2.入門板TK-78K0/KC2L外形圖

入門板TK-78K0/KC2L主要特性:

Capability evaluations can be speedily executed by the adoption of the µPD78F0588GA

256KB on-chip flash memory and 16KB high-speed internal RAM

Equipped with a maximum of 84 I/O ports

Compact, business card size

Realize efficient development by linking development tools, such as a compiler and debugger, with the integrated development environment (PM plus)

Please download the hardware manual and tutorial guide from TESSERA Technology ‘s website.


圖3.數碼相框系統框圖
推薦使用的元器件:

詳情請見:
http://www2.renesas.com/maps_download/pdf/R01UH0028EJ0400_78K0KX2L.pdf
和
http://am.renesas.com/media/applications/solutioncatalog/r30ca0033ej0203_consumer.pdf