TM52F2280/F2284 integrates low power consumption clock and LCD display
function, but also is added with power save touch key function, very suitable for
battery-powered application product, for example LCD display touch key remote
control, touch key watch, touch key timer, touch key calculator, touch key password-
locked safe, etc…, the specification meets engineering rules -40℃~85℃ operating
temperature and high noise immunity EFT/ESD characteristics demand, suitable for
various AC power supply product fields application.
TM52F2280/F2284 uses tenx L51 CPU Core, compared to the traditional 8051 IC,
the overall power consumption is lower; operating speed is faster and more
efficient. TM52F2280/F2284 keeps most of the characteristics in standard 8051,
program memory provides 8 KBytes flash memory space, and also provides
ICP/ISP/IAP storage function; developers can store data directly into Flash memory
space, while internal SRAM provides 512 Bytes storage space, UART interface is
compatible with standard 8051, and provides one set of SPI interface, Timer0/1/2 is
standard 8051 timer. Besides, in Timer3 user can use 32.768 KHz clock source.
Timer3 provides 23-bit timer which allows long period of counting, can calibrate
accurately +/- 0.5 ppm ~ 61 ppm calibration ranges, provides developer very
accurate clock source.
TM52F2280 provides power save Auto Touch key structure, which adopts touch
key hardware interrupt to do touch key interrupt. When CPU enters Idle mode, it
still can detect touch key, therefore, standby current touch key detection can be less
than 1 uA. TM52F2280 touch key structure is high-integrated IC, requires very little
external element, can provide up to 15 Touch key input, at the same time can
provide up to 4 Touch key wake-up for polling detection. Besides, internal Touch
Key standard weight function can provide Touch Key standard weight function value
for external bad environment, which is used for calibrating external touch point and
internal touch weight function value, to strengthen Touch Key detection accuracy.
When external touch key detects hand touch operation, will trigger hardware
interrupt to awake CPU for touch key detection judgment, so battery voltage in 3V,
internal chip is using power saving operation. When CPU operates clock source
32.768 KHz in Idle mode, enables Auto Touch key polling detection and LCD display,
the minimal power consumption can be 2 uA.
TM52F2280/F2284 provides power saving LCD display structure, the driving
capability is up to 8 COM* 23 SEG selectable LCD pixel output, 1 /3 ~ 1/8 duty and
1/3 LCD bias voltage. VL1=VLCD/3, VL2=VLCD*2/3 voltage. Under 32 KHz
condition, can select internal power save to achieve low power consumption
characteristic. When battery voltage is 3V, with internal power save, LCD is enabled,
and when operating clock source is 32.768 KHz in Idle mode, the minimum power
consumption can be 1 uA. With the same condition, if LCD is disabled, the minimum
standby power consumption can be 0.7 uA. Besides, TM52F2280/F2284 supports
LED transductive output, LED can support up to 4 COM* 10 SEG pixel output, each
COM pin output capability is 40 mA. In power supply control, TM52F2280/F2284
provides internal bandgap for voltage calibration, at the same time provides Tiny
current LDO regulator output for IC use. And also allows developer chooses different
power saving in different operating mode (Fast/Slow/Idle/Stop).
For TM52F2280/F2284, tenx plans of using convenient USB development tool
(EV2280 board), which can directly use the original IC (Real chip) to do ICE in-line
trimming. Using USB EV2280 Board immediately simulate IC condition, can access
memory space and set register directly, provide routine breakpoint and step, can
execute tracking analysis data, increase program development efficiency and debug
capability, very suitable for fast product development.