ST72E331 ST72T331
1.4 MEMORY MAP
Figure 7. Program Memory Map
0080h
0000h
HW Registers
(see
Table 4)
007Fh
0080h
Short Addressing
RAM (zero page)
00FFh
0100h
01FFh
256 Bytes Stack/
16-bit Addressing RAM
384 Bytes RAM
01FFh
027Fh
0200h / 0280h
512 Bytes RAM
Reserved
0080h
00FFh
0BFFh
0C00h
0CFFh
0D00h
BFFFh
C000h
Short Addressing
RAM (zero page)
256 Bytes EEPROM
Reserved
16K Bytes
Program
Memory
0100h
256 Bytes Stack/
16-bit Addressing RAM
01FFh
0200h
027Fh
E000h
FFDFh
FFE0h
FFFFh
8K Bytes
Program
Memory
16-bit Addressing
RAM
Interrupt & Reset Vectors
(see
Table 3)
Table 3. Interrupt Vector Map
Vector Address
FFE0-FFE1h
FFE2-FFE3h
FFE4-FFE5h
FFE6-FFE7h
FFE8-FFE9h
FFEA-FFEBh
FFEC-FFEDh
FFEE-FFEFh
FFF0-FFF1h
FFF2-FFF3h
FFF4-FFF5h
FFF6-FFF7h
FFF8-FFF9h
FFFA-FFFBh
FFFC-FFFDh
FFFE-FFFFh
Description
Not Used
Not Used
EEPROM Interrupt Vector
SCI Interrupt Vector
TIMER B Interrupt Vector
TIMER A Interrupt Vector
SPI interrupt vector
Not Used
External Interrupt Vector EI3
External Interrupt Vector EI2
External Interrupt Vector EI1
External Interrupt Vector EI0
Not Used
Not Used
TRAP (software) Interrupt Vector
RESET Vector
CPU Interrupt
External Interrupt
External Interrupt
External Interrupt
External Interrupt
Internal Interrupt
Internal Interrupt
Internal Interrupt
Internal Interrupt
Internal Interrupt
Remarks
11/107
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