P89LPC9103FTK NXP Semiconductors, P89LPC9103FTK Datasheet - Page 22

• Manufacturer Part Number: P89LPC9103FTK
• Description: MCU 8BIT 80C51 1K FLASH, HVSON-10
• Manufacturer: NXP Semiconductors

Specifications of P89LPC9103FTK

• Controller Family/series: (8051) 8052
• Core Size: 8bit
• No. Of I/o's: 8
• Program Memory Size: 1KB
• Ram Memory Size: 128Byte
• Cpu Speed: 18MHz
• Oscillator Type: Internal Only
• No. Of Timers: 4
• No. Of Pwm: RoHS Compliant

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All ports are in input-only (high-impedance) state after power-up.
The RSTSRC register reflects the cause of the P89LPC9102/9103/9107 reset. Upon a power-up reset, all reset source flags are cleared except POF and BOF; the power-on reset
value is xx11 0000.
The only reset source that affects these SFRs is power-on reset.
On power-on reset, the TRIM SFR is initialized with a factory preprogrammed value. Other resets will not cause initialization of the TRIM register.
After reset, the value is 1110 01x1, i.e., PRE2 to PRE0 are all logic 1s, WDRUN = 1 and WDCLK = 1. WDTOF bit is logic 1 after watchdog timer reset and is logic 0 after power-on
reset. Other resets will not affect WDTOF.