AT89C51RC2 Atmel Corporation, AT89C51RC2 Datasheet - Page 20
![no-image](/images/manufacturer_photos/0/0/79/atmel_corporation_sml.jpg)
AT89C51RC2
Manufacturer Part Number
AT89C51RC2
Description
Manufacturer
Atmel Corporation
Specifications of AT89C51RC2
Flash (kbytes)
32 Kbytes
Max. Operating Frequency
60 MHz
Cpu
8051-12C
Max I/o Pins
32
Spi
1
Uart
1
Sram (kbytes)
1.25
Self Program Memory
API
Operating Voltage (vcc)
2.7 to 5.5
Timers
4
Isp
UART
Watchdog
Yes
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT89C51RC2-3CSUM
Manufacturer:
ATMEL
Quantity:
15 569
Company:
Part Number:
AT89C51RC2-CM
Manufacturer:
ATMEL
Quantity:
8 831
Part Number:
AT89C51RC2-CM
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Company:
Part Number:
AT89C51RC2-IM
Manufacturer:
ATMEL
Quantity:
719
Part Number:
AT89C51RC2-IM
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Company:
Part Number:
AT89C51RC2-RLRIL
Manufacturer:
Atmel
Quantity:
1 495
Company:
Part Number:
AT89C51RC2-RLTIL
Manufacturer:
ATMEL
Quantity:
5 000
Part Number:
AT89C51RC2-RLTUM
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Dual Data Pointer
Register (DPTR)
Figure 7. Use of Dual Pointer
20
AT89C51RB2/RC2
7
AUXR1(A2H)
DPS
0
The additional data pointer can be used to speed up code execution and reduce code
size.
The dual DPTR structure is a way by which the chip will specify the address of an exter-
nal data memory location. There are two 16-bit DPTR registers that address the external
memory, and a single bit called DPS = AUXR1.0 (see Table 17) that allows the program
code to switch between them (see Figure 7).
DPH(83H) DPL(82H)
DPTR1
DPTR0
External Data Memory
4180E–8051–10/06