Description
The OB39R32T2 is a 1T (one machine cycle per clock) single-chip 8-bit microcontroller. It has 32KB+8KB embedded Flash for program, and executes alASM51 instructions fully compatible with MCS-51.
OB39R32T2 contains 1152B+256B on-chip RAM, various seriainterfaces and many peripherafunctions as described below. It can be programmed via writers. Its on-chip ICE is convenient for users in verification during development stage.
The high performance of OB39R32T2 can achieve complicated manipulation within short time. About one third of the instructions are pure 1T, and the average speed is 8 times of traditiona8051, the fastest one among althe 1T 51-series.Its excellent EMI and ESD characteristics are advantageous for many different applications.
Ordering Information
OB39R32T2ihhkYWW
i: process identifier { W = 2.2V ~ 5.5V}
hh: pin count
k: package type postfix {as table below }
L:PB Free identifier
{No text is Non-PB free，”P” is PB free}
Y: Year Code
WW: Week Code (01-52)
| Postfix | Package |
| S | SOP (300 mil) |
| V | LQFP |
| G | SSOP (150 mil) |
Features
32KB+8KB on-chip program memory.
Working voltage 2.2V~5.5V.
High speed architecture of 1 clock/machine cycle runs up to 22.1184MHz.
1~8T can be switched on the fly.
256 bytes RAM as standard 8052, plus 1152 bytes on-chip expandable RAM
Port 0~3,Up to 30 GPIO
Dua16-bit Data Pointers (DPTR0 & DPTR1).
Two seriaperipherainterfaces in fulduplex mode
(UART0 & UART1)
Up to 24 touch sense inputs, support multiplexing I/O function.
Lower power touch-key wakeup function.
Four 16-bit Timer/Counters. (Timer 0,1,2,3)
Programmable watchdog reset and interrupt timer.
Two IIC interface. (Master/Slave mode).
4-channe16-bit compare / capture functions.
4-channePWM.
ISP/IAP/ICP functions.
On-Chip in-circuit emulator (ICE) functions with On-Chip Debugger (OCD).
LVI/LVR (LVR deglitch 500ns).
POR and Programmable LVR(2.7V / 1.55V) & LVI (4.0V / 3.3V / 2.8V / 1.8V)
10-channe12-bit ADC.
Externainterrupt 0, 1, 2, 3 with four priority levels.(INT x 4)
Keyboard Interface (KBI x 8) on port 1 for eight more interrupts.
LED driver: COM x7, Segment x 16.
Software RTC
Enhance user code protection.
Power management unit for IDLE and power down modes.
Clock Source:
– 32.768KHz XTAinput to timer, allow running on power down mode with wakeup function .
– HIRC: 22.1184MHz InternaRC-oscillator, with programmable clock divider. Factory trimmed to 2% at fultemperature range
– LIRC: 26KHz