The AT89S52 is a low power, high performance CMOS 8-bit microcontroller with 8K system programmable Flash memory. Manufactured using Atmel's high-density non-volatile memory technology, it is fully compatible with industrial 80C51 product instructions and pins. On-chip Flash allows program memory to be programmable in the system and is also suitable for conventional programmers. On a single chip, with a smart 8-bit CPU and in-system programmable Flash, the AT89S52 is widely used in many embedded control applications.
AT89S52 main performance1. Compatible with MCS-51 microcontroller products;
2, 8K bytes in the system programmable flash memory;
3, 1000 erasing cycles;
4, full static operation: 0Hz-33MHz;
5. Three-level encryption program memory;
6, 32 programmable I / O line;
7, three 16-bit timers/counters;
8, 6 interrupt sources;
9. Full-duplex UART serial channel;
10. Low power idle and power down mode;
11. The interrupt can be awakened after power failure;
12. Watchdog timer;
13, double data pointer;
14, power failure identifier.
AT89S52 register timer 2 registerRegisters T2CON and T2MOD contain the Timer 2 control and status bits (as shown in Table 2 and Table 3). Register pairs RCAP2H and RCAP2L are Timer 2 capture/auto-reload registers.
Interrupt registerEach interrupt enable bit is in the IE register, and the two priority levels of the six interrupt sources can also be set in IE.
T2CON: Timer/Counter 2 Control Register T2CON Address is 0C8H
The reset value B bit is addressable.
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