Product Description:

The FT62F28X is a high performance compact instruction set 8-bit touch microcontroller. It integrates 28 touch buttons internally and requires only one external reference capacitor to realise the touch function, which can be applied to touch-related products. On the analogue side, the chip contains a multi-channel 12-bit A/D converter, an op-amp and two comparators. In terms of protection, the chip contains internal protection features such as watchdog, low-voltage reset and low-voltage detection. In terms of communication interfaces, the chip integrates 1 I2C, 1 SPI and 2 UART interfaces. In addition the chip also has 3 built-in timer/counters that can be used for timing and generating PWM functions with 16bit resolution. The chip contains 30 independently controlled IOs for applications where multiple IOs are required.

Application Areas:

Electronic measuring instruments, household appliances, toys, etc.

CPU characteristics:

Operating voltage: 1.9V~5.5V

Operating temperature range: -40°C~85°C

RISC architecture, only 37 instructions to learn

All instructions are single cycle except branch jumping

Selectable instruction cycles: 2T/4T

Minimum instruction cycle is 125ns (VDD>2.7V)

Memory Architecture

Programme memory: 8K x 14bits

Data RAM: 616x 8bits

Data EEPROM: 128 x 8bits

8-layer hardware stack

Low power mode SLEEP

System clock can be optionally kept running or switched off

Peripheral Features:

28 touch keys

Clock Source

13.5M/16M high speed high precision HIRC

32K low-speed low-power LIRC

Crystal oscillator and external clock input

Crystal clock miss detection

30 bi-directional IOs

Timer

1 x 8bit basic Timer0

1 x 16bit Timer2, with 4-bit pre-scaler and 4-bit post-scaler, supports complementary PWM with deadband

1 x 12bit Timer1, clock source optional

16-bit watchdog with 3-bit post-scaler, clock source selectable

Power-on reset delay counter

12-bit ADC with 30 external channels and 3 internal reference voltage channels

Communication interfaces

1 x I2C

1 x SPI

2 x UART

2 comparators with 7-bit DACs

1 op-amp, output can be used as ADC channel

Low Voltage Reset LVR: 2.0V/2.2V/2.5V/2.8V/3.1V/3.6V/4.1V

Low Voltage Detect LVD: 1.2V/2.0V2.4V/2.7V/3.0V/3.3V/3.6V/4.0V or external input voltage

Support ISP and online debugging OCD