OB5517 is a master control chip with digital-analog hybrid technology, which is used in soymilk machine products. It has a fast single-cycle 8051 core, 16KB flash memory, 1KB+256B SRAM, and can execute all ASM51-compatible instructions, with the same instruction settings as the MCS-51. The chip integrates ADC, touch buttons, LED drivers, PWM, op amps, zero-crossing detection circuits and other modules.

Features

Working voltage: 2.4V ~ 5.5V

High-speed 1T architecture, up to 16MHz

The l1~8T mode can be programmed using software

Command settings are compatible with MCS-51

Built-in 16MHz RC oscillator and programmable crossover

16K bytes of on-chip programmable memory

256 bytes of standard 8052 RAM

1K bytes of external SRAM

1 serial interface for full-duplex communication. Additional baud rate generator

Integrated 12-way touch buttons

Low power touch button wake-up function

4 x 16-bit timers/counters (timers 0,1,2,3)

20 GPIOs, four types can be selected (quasi-bidirectional port, push-pull, open-drain, input only), and the default quasi-bidirectional port (pull-up)

External Interrupt 0 & External Interrupt 1 with Four-Level Priority

Programmable Watchdog Timer (WDT)

1 IIC interface (master/slave mode)

4 channel with dead time 10-bit pulse width modulation (PWM)

4 channel 16-bit comparison/capture function

8 x 12-bit analog-to-digital (ADC)

LED driver: 7 high-current COM ports, 13 SEG ports

On-chip memory supports ISP/IAP/ICP and EEPROM functions

ISP server storage space set to N*128 byte (N=0 to 8)

On-chip on-chip simulation (ICE) and on-chip online debugging (OCD)

Low Voltage Interrupt/Low Voltage Reset (LVI/LVR)

2 external interrupt INTs with rising/falling edge detection

Pin ESD performance exceeds 4KV

Enhance user code protection

Idle and power-down modes of power management unit

Simulation unit

Integrated One Op Amp (OPA)

Integrated Zero-Crossing Detection (ZD)

Package type: 20/28-SOP