ADUC832 Analog Devices, ADUC832 Datasheet - Page 32

• Manufacturer Part Number: ADUC832
• Description: Precision Analog Microcontroller: 1.3MIPS 8052 MCU + 62kB Flash + 8-Ch 12-Bit ADC + Dual 12-Bit DAC
• Manufacturer: Analog Devices

Specifications of ADUC832

• Mcu Core: 8052
• Mcu Speed (mips): 1.3
• Sram (bytes): 2304Bytes
• Gpio Pins: 34
• Adc # Channels: 8
• Other: PWM

ADuC832
EXTERNAL DATA MEMORY (EXTERNAL XRAM)
FFFFFFH
FFFFFFH
Similar to a standard 8051-compatible core, the ADuC832 can
access external data memory using a MOVX instruction. The
EXTERNAL
MOVX instruction automatically outputs the various control
DATA
strobes required to access the data memory.
MEMORY
EXTERNAL
SPACE
DATA
(24-BIT
The ADuC832, however, can access up to 16 MB of external
MEMORY
ADDRESS
SPACE
SPACE)
data memory. This is an enhancement of the 64 kB external data
(24-BIT
ADDRESS
memory space available on a standard 8051-compatible core.
SPACE)
The external data memory is discussed in more detail in the
ADuC832 Hardware Design Considerations section.
000800H
0007FFH
INTERNAL XRAM
2 kB
ON-CHIP
XRAM
There are 2 kB of on-chip data memory on the ADuC832. This
000000H
000000H
memory, although on chip, is also accessed via the MOVX instruc-
CFG832[0] = 0
CFG832[0] = 1
tion. The 2 kB of internal XRAM are mapped into the bottom
Figure 34. Internal and External XRAM
2 kB of the external address space if CFG832[0] is set. Otherwise,
access to the external data memory occurs similar to a standard
8051. When using the internal XRAM, Port 0 and Port 2 are
free to be used as general-purpose I/Os.
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