Z8 Encore! XP® 4K Series
Product Specification
14
Program Memory
The eZ8 CPU supports 64KB of Program Memory address space. The Z8 Encore! XP®
4K Series devices contain 1KB to 4KB of on-chip Flash memory in the Program Memory
address space, depending on the device. Reading from Program Memory addresses out-
side the available Flash memory addresses returns FFH. Writing to these unimplemented
Program Memory addresses produces no effect. Table 6 describes the Program Memory
Maps for the Z8 Encore! XP® 4K Series products.
®
Table 6. Z8 Encore! XP 4K Series Series Program Memory Maps
Program Memory Address (Hex)
Function
Z8F042A and Z8F041A Products
0000–0001
Flash Option Bits
Reset Vector
0002–0003
0004–0005
WDT Interrupt Vector
Illegal Instruction Trap
Interrupt Vectors*
Reserved
0006–0007
0008–0037
0038-0039
003A-003D
Oscillator Fail Trap Vectors
Program Memory
003E–0FFF
Z8F022A and Z8F021A Products
0000–0001
Flash Option Bits
Reset Vector
0002–0003
0004–0005
WDT Interrupt Vector
Illegal Instruction Trap
Interrupt Vectors*
Reserved
0006–0007
0008–0037
0038-0039
003A-003D
Oscillator Fail Trap Vectors
Program Memory
003E–07FF
Z8F012A and Z8F011A Products
0000–0001
Flash Option Bits
Reset Vector
0002–0003
0004–0005
WDT Interrupt Vector
* See Table 33 on page 51 for a list of the interrupt vectors.
PS022815-0206
Address Space
ZILOG [ ZILOG, INC. ]
