Chapter 1 BF7615CMXX-XXXX MCU Overview

1.1. Feature Introduction

? Core: High-speed 8051

○ Operating frequency: 12MHz, 8MHz, 4MHz, 1MHz

○ Clock deviation: ±1% @-20℃~65℃, 5V

±2% @-40℃~85℃, 5V

±3% @-40℃ ~105℃, 5V

? Memory (FLASH)

○ CODE: 63K Bytes

○ DATA: 1K Bytes +2*512Bytes

○ SRAM: 256 Bytes(data)+4K Bytes(xdata)

○ Supports BOOT function area, 2/4/8K optional

? Clock source, reset and power management

○ Internal low-speed clock LIRC:

3

2kHz, clock deviation ±25%@25℃, 5V,

±35% @-40℃ ~105℃, 5V

○ Internal high-speed RC oscillator: 1MHz

○ External crystal oscillator: 32768Hz/4MHz

○ 8 types of reset, among which brown-out reset voltage (BOR):

2.3V/2.8V/3.3V/3.7V/4.2V, 5 levels configurable

○ Low voltage detection: 2.7V/3.0V/3.3V/3.6V/3.8V/4.0V/4.2V/4.4V,

8 levels configurable

? IO

○ All support built-in pull-up resistor 35k

○ High sink current ports (PB0~PB7)

○ Supports IO function remapping

○ Supports external interrupt function,

I

NT0~3 (rising edge, falling edge, both edges),

I

NT4

Shared interrupt source (rising edge, falling edge)

? Communication modules

○ 3xUART communication modules

○ 1xIIC hardware slave communication, supports standard 100K and fast 400K communication

○ 1xSPI, maximum communication frequency 2MHz

? 16-Bit PWM

○ PWM0 supports 5 channels, shared period and duty cycle, polarity configurable

○ PWM1 supports 5 channels, shared period and duty cycle, polarity configurable

○ PWM2 supports 1 channel, polarity not configurable

○ PWM3 supports 1 channel, polarity not configurable

? Operating voltage: 2.7V ~ 5.5V

? Operating temperature: -40℃ ~ 105℃

○ Enhanced industrial grade, compliant with JESD industrial reliability certification standards

? High-precision 12-bit ADC

○ Up to 42 analog input channels

○ Reference voltage: VCC/2V/4V

? Interrupts

○ Two-level interrupt priority selectable

○ ADC, CSD, LED, LCD, INT0/1/2/3/4, LVDT, IIC,

WDT, Timer0~3, UART0/1/2, PWM0/1, SPI interrupts

? Timers

○ 16-bit Timer0/1/3, 32-bit Timer2

○ Timer2 clock source: LIRC32k, XTAL32768Hz/4MHz

○ Watchdog timer, overflow time 18ms to 2.304s

? LED Driver

○ 4x5, 5x6, 6x7, 7x8 serial dot matrix drive

○ LED0~LED7 scan sequence configurable

○ Row/column matrix drive duty cycle 1/8~8/8 configurable

○ Supports up to 8 COM x 8 SEG LED drive matrix

? LCD Driver

○ 4 COM x 28 SEG (1/4 duty, 1/3 bias)

○ 5 COM x 27 SEG (1/5 duty, 1/3 bias)

○ 6 COM x 26 SEG (1/6 duty, 1/3 or 1/4 bias)

○ 8 COM x 24 SEG (1/8 duty, 1/4 bias)

? Low power management

○ Idle mode 0 and idle mode 1

○ Idle mode 1, power consumption 12μA @5V typical

? Touch keys

○ Sensitivity of each key independently settable

○ Capacitive keys, all can be reused as GPIO

? Two-wire programming single-wire debug emulation interface

? Package

○ SOP20/SOP24/SOP28/LQFP32/LQFP44