71M6521FEIM-DB Maxim Integrated Products, 71M6521FEIM-DB Datasheet - Page 39

• Manufacturer Part Number: 71M6521FEIM-DB
• Description: Power Management Modules & Development Tools 71M6521FE DEMO BOARD M6521FE DEMO BOARD
• Manufacturer: Maxim Integrated Products

Specifications of 71M6521FEIM-DB

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

71M652X Software User’s Guide
Type definitions for internal data, 256 bytes, in the upper 128 bytes addressed indirectly:
This is fairly fast, not battery-backed-up memory, slower than the data in the lower 128 bytes of internal memory.
Competes with data for space.
Type definitions for external data, 256 bytes of 2K of CMOS RAM:
The upper byte of the XDATA address is supplied by the SFR 0xBF (ADRMSB) on the 71M6521 meter ICs. On other
8051 processors, P2 is used for this purpose. This memory range is accessed indirectly, still fairly fast, not battery
backed-up. This is a logical place for nonvolatile globals like power registers and configuration data.
Type definitions for external data, 2Kbytes of CMOS RAM, accessed indirectly via a 16-bit register:
This is the slowest but largest memory are, not battery backed-up. It can be used for everything possible. On Keil's
large model, this is the default.
Type definitions for external read-only data, located in code space:
Access is indirect via a 16-bit register. This is the slowest but largest space, nonvolatile programmable flash memory. It
should be used for constants and tables
Revision 1.7
typedef unsigned char idata
typedef unsigned short idata
typedef unsigned long idata
typedef signed char idata
typedef signed short idata
typedef signed long idata
typedef unsigned char pdata
typedef unsigned short pdata uint16p_t;
typedef unsigned long pdata
typedef signed char pdata
typedef signed short pdata
typedef signed long pdata
typedef unsigned char xdata
typedef unsigned short xdata
typedef unsigned long xdata
typedef signed char xdata
typedef signed short xdata
typedef signed long xdata
typedef unsigned char code
typedef unsigned short code
typedef unsigned long code
typedef signed char code
typedef signed short code
typedef signed long code
© Copyright 2005-2007 TERIDIAN Semiconductor Corporation
uint8i_t;
uint16i_t;
uint32i_t;
int8i_t;
int16i_t;
int32i_t;
uint8p_t;
uint32p_t;
int8p_t;
int16p_t;
int32p_t;
uint8x_t;
uint16x_t;
uint32x_t;
int8x_t;
int16x_t;
int32x_t;
uint8r_t;
uint16r_t;
uint32r_t;
int8r_t;
int16r_t;
int32r_t;
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