AT89C51RE2 Atmel Corporation, AT89C51RE2 Datasheet - Page 7

• Manufacturer Part Number: AT89C51RE2
• Manufacturer: Atmel Corporation

Specifications of AT89C51RE2

• Flash (kbytes): 128 Kbytes
• Max. Operating Frequency: 60 MHz
• Cpu: 8051-12C
• Max I/o Pins: 34
• Spi: 1
• Uart: 2
• Sram (kbytes): 8.25
• Self Program Memory: API
• Operating Voltage (vcc): 2.7 to 5.5
• Timers: 4
• Isp: UART/OCD
• Watchdog: Yes

SFR Mapping
7663E–8051–10/08
The Special Function Registers (SFRs) of the AT89C51RE2 fall into the following categories:
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C51 core registers: ACC, B, DPH, DPL, PSW, SP
I/O port registers: P0, P1, P2, P3, P4, P5, P6
Timer registers: T2CON, T2MOD, TCON, TH0, TH1, TH2, TMOD, TL0, TL1, TL2, RCAP2L,
RCAP2H
Serial I/O port registers: SADDR_0, SADEN_0, SBUF_0, SCON_0, SADDR_1, SADEN_1,
SBUF_1, SCON_1,
PCA (Programmable Counter Array) registers: CCON, CCAPMx, CL, CH, CCAPxH,
CCAPxL (x: 0 to 4)
Power and clock control registers: PCON, CKAL, CKCON0_1
Hardware Watchdog Timer registers: WDTRST, WDTPRG
Interrupt system registers: IE0, IPL0, IPH0, IE1, IPL1, IPH1
Keyboard Interface registers: KBE, KBF, KBLS
2-wire Interface registers: SSCON, SSCS, SSDAT, SSADR
SPI registers: SPCON, SPSTR, SPDAT
BRG (Baud Rate Generator) registers: BRL_0, BRL_1, BDRCON_0, BDRCON_1
Memory register: FCON, FSTA
Clock Prescaler register: CKRL
Others: AUXR, AUXR1, CKCON0, CKCON1, BMSEL
AT89C51RE2
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