z16f2811 ZiLOG Semiconductor, z16f2811 Datasheet - Page 35

• Manufacturer Part Number: z16f2811
• Description: High Performance Microcontrollers
• Manufacturer: ZiLOG Semiconductor

Internal RAM
Input/Output Memory
CPU Control Registers
PS022006-0207
Input/Output Memory Precautions
Table 4. Reserved Memory Map Example
Internal RAM is mainly employed for data and stacks. However, internal RAM also
contains program code for execution. Most ZNEO CPU devices contain some internal
RAM. The top (highest address) of internal RAM is always located at address
The bottom (lowest address) of internal RAM is a function of the amount of internal RAM
available. To determine the amount of internal RAM available, see
on page
The ZNEO CPU supports 8 KB (8,192 bytes) of I/O memory space located at addresses
FF_E000H
ZNEO CPU, the on-chip peripherals, and the I/O ports. Refer to the device-specific
Product Specification for descriptions of the peripheral and I/O control registers. Attempts
to read or execute from unavailable I/O memory addresses returns
to unavailable I/O memory addresses produce no effect.
Some control registers within the I/O memory provide read-only or write-only access.
When accessing these read-only or write-only registers, ensure that the instructions do not
attempt to read from a write-only register, or conversely write to a read-only register.
Some registers are reserved in 8 KB of I/O memory for the ZNEO CPU control. These
ZNEO CPU control registers are listed in
the operation of the ZNEO CPU control registers, refer to ZNEO CPU User Manual
(UM0188), available for download at www.zilog.com.
Memory Address (Hex)
00_0000 - 00_0003
00_0004 - 00_0007
00_0008 - 00_000B
00_000C - 00_000F
00_0010 - 00_006F
357.
through
FF_FFFFH
P R E L I M I N A R Y
. The I/O memory addresses are reserved for control of the
Description
Option bits
RESET vector
System exception vector
Privileged trap vector
Interrupt vectors
Table 5
on page 22. For detailed information on
Product Specification
ZNEO
FFH
Ordering Information
. Attempts to write
™
Address Space
Z16F Series
FF_BFFFH
.
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