Z8F64220100ZDA Zilog, Z8F64220100ZDA Datasheet - Page 31

• Manufacturer Part Number: Z8F64220100ZDA
• Description: ADAPTER ICE Z8 ENCORE 64K 64LQFP
• Manufacturer: Zilog

Specifications of Z8F64220100ZDA

• Module/board Type: *
• For Use With/related Products: Z8 Encore!™
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 269-3403

Address Space
Register File
Program Memory
PS019921-0308
The eZ8
•
•
•
These three address spaces are covered briefly in the following subsections. For more
information on eZ8 CPU and its address space, refer to eZ8
(UM0128) available for download at www.zilog.com.
The Register File address space in the Z8 Encore! XP F64XX Series is 4 KB (4096 bytes).
The Register File is composed of two sections—control registers and general-purpose reg-
isters. When instructions are executed, registers are read from when defined as sources
and written to when defined as destinations. The architecture of the eZ8 CPU allows all
general-purpose registers to function as accumulators, address pointers, index registers,
stack areas, or scratch pad memory.
The upper 256 bytes of the 4 KB Register File address space are reserved for control of the
eZ8 CPU, the on-chip peripherals, and the I/O ports. These registers are located at
addresses from
section are reserved (unavailable). Reading from an reserved Register File addresses
returns an undefined value. Writing to reserved Register File addresses is not
recommended and can produce unpredictable results.
The on-chip RAM always begins at address 000H in the Register File address space. The
Z8 Encore! XP F64XX Series provide 2 KB to 4 KB of on-chip RAM depending upon the
device. Reading from Register File addresses outside the available RAM addresses (and
not within the control register address space) returns an undefined value. Writing to these
Register File addresses produces no effect. To determine the amount of RAM available for
the specific Z8 Encore! XP F64XX Series device, see
The eZ8
F64XX Series contains 16 KB to 64 KB of on-chip Flash in the Program Memory address
space, depending upon the device. Reading from Program Memory addresses outside the
The Register File contains addresses for the general-purpose registers and the
eZ8 CPU, peripheral, and general-purpose I/O port control registers.
The Program Memory contains addresses for all memory locations having executable
code and/or data.
The Data Memory consists of the addresses for all memory locations that hold only
data.
™
™
CPU can access three distinct address spaces:
CPU supports 64 KB of Program Memory address space. The Z8 Encore! XP
F00H
to
FFFH
. Some of the addresses within the 256-byte control register
Part Selection Guide
Z8 Encore! XP
™
CPU Core User Manual
Product Specification
®
F64XX Series
on page 2.
Address Space
17