73s1217f68im Maxim Integrated Products, Inc., 73s1217f68im Datasheet - Page 15

• Manufacturer Part Number: 73s1217f68im
• Description: Bus-powered 80515 System-on-chip With Usb, Iso 7816 / Emv, Pinpad And More
• Manufacturer: Maxim Integrated Products, Inc.

Dual Data Pointer: The Dual Data Pointer accelerates the block moves of data. The standard DPTR is a
16-bit register that is used to address external memory. In the 80515 core, the standard data pointer is
called DPTR, the second data pointer is called DPTR1. The data pointer select bit chooses the active
pointer. The data pointer select bit is located at the LSB of the DPS IRAM special function register
(DPS.0). DPTR is selected when DPS.0 = 0 and DPTR1 is selected when DPS.0 = 1.
The user switches between pointers by toggling the LSB of the DPS register. All DPTR-related
instructions use the currently selected DPTR for any activity.
Note: The second data pointer may not be supported by certain compilers.
Rev. 1.2
Address
0xFFFF
Program Memory
0x0000
Program
Memory
Bytes
Flash
Use
64K
Address
0xFFFF
0XFF80
0xFF7F
0XFE00
0xFDFF
0XFC00
0xFBFF
0x0800
0x07FF
0x0000
External Data Memory
USB Registers (512b)
Smart Card Control
Peripheral Control
Registers (128b)
Figure 2: Memory Map
(384b)
XRAM
Use
–
Address
0xFF
0x7F
0x1F
0x0F
0x80
0x48
0x47
0x20
0x18
0x17
0x10
0x08
0x07
0x00
Internal Data Memory
Byte RAM
Indirect
Access
Register bank 3
Register bank 2
Register bank 1
Register bank 0
Bit/Byte RAM
Byte RAM
Use
Access
Direct
SFRs
15