71M6523-DB Maxim Integrated Products, 71M6523-DB Datasheet - Page 37
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71M6523-DB
Manufacturer Part Number
71M6523-DB
Description
Power Management Modules & Development Tools 71M6521D 68 QFN DEMO BOARD
Manufacturer
Maxim Integrated Products
Datasheet
1.71M6521DE-DB.pdf
(138 pages)
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71M652X Software User’s Guide
The 80515 MPU core is an 8-bit micro controller (MPU); thus operations that use 8-bit data types such as “char” or
“unsigned char” work more efficiently than operations that use multi-byte types, such as “int” or “long”. The Keil C51
compiler supports ANSI C data types as well as data types that are unique to the generic 8051 controller family. Table
5-2 lists available data types. Please refer to the Keil Cx51 Compiler User’s Guide for more details.
Various types of address spaces are available for the 80515 MPU core of the 71M652X, and in order to utilize the
various memory space types efficiently, the Demo Code uses variable type definitions (typedefs.) presented in this
chapter.
To understand the data types, it helps to examine the internal data memory map of the 80515 MPU core, as shown in
Table 5-1: .
Revision 1.7
5.1
5.1.1 Data Types
5
DEMO CODE DESCRIPTION
80515 DATA TYPES AND COMPILER-SPECIFIC INFORMATION
0xFF
0x80
0x7F
0x30
0x2F
0x20
0x1F
0x00
Address
© Copyright 2005-2007 TERIDIAN Semiconductor Corporation
Special Function Registers
Direct addressing
Table 5-1: Internal Data Memory Map
(SFRs)
TERIDIAN Proprietary
Register banks R0…R7
Byte-addressable area
Bit-addressable area
Indirect addressing
RAM
5
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