EZ80F91MCU ZILOG [Zilog, Inc.], EZ80F91MCU Datasheet - Page 120
EZ80F91MCU
Manufacturer Part Number
EZ80F91MCU
Description
eZ80Acclaim-TM Flash Microcontrollers
Manufacturer
ZILOG [Zilog, Inc.]
Datasheet
1.EZ80F91MCU.pdf
(396 pages)
- Current page: 120 of 396
- Download datasheet (5Mb)
Random Access Memory
PS019209-0504
The eZ80F91 device features 8 KB (8192 bytes) of single-port data Random
Access Memory (RAM) for general-purpose use and 8 KB of RAM for the Ethernet
MAC. RAM can be enabled or disabled, and it can be relocated to the top of any
64 KB page in memory. Data is passed to and from RAM via the 8-bit data bus.
On-chip RAM operates with zero wait states. EMAC RAM is accessed via the bus
arbiter and can execute with zero or one wait states.
General-purpose RAM occupies memory addresses in the RAM Address Upper
Byte register, in the range
FFFFh}.
{RAM_ADDR_U[7:0], C000h} to {RAM_ADDR_U[7:0], DFFFh}.
RESET, RAM is enabled when RAM_ADDR_U is set to
a memory map for on-chip RAM. In this example, RAM_ADDR_U is set to
Figure 21 is not drawn to scale, as RAM occupies only a very small fraction of the
available 16 MB address space.
Figure 21. Example: eZ80F91 On-Chip RAM Memory Addressing
When enabled, on-chip RAM assumes priority over on-chip Flash Memory and
any Memory Chip Selects that can also be enabled in the same address space. If
an address is generated in a range that is covered by both the RAM address
7ADFFFh
FFFFFFh
7AFFFFh
7AE000h
7AC000h
000000h
Location
Memory
EMAC RAM occupies memory addresses in the range
General-Purpose
EMAC SRAM
8 KB
RAM
8 KB
P R E L I M I N A R Y
{RAM_ADDR_U[7:0], E000h} to {RAM_ADDR_U[7:0],
RAM_ADDR_U
7Ah
FFh
Product Specification
. Figure 21 illustrates
Random Access Memory
eZ80F91 MCU
Following a
7Ah
.
101
Related parts for EZ80F91MCU
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
KIT DEV EZ80 WEB SERVER
Manufacturer:
Zilog
Datasheet:
Part Number:
Description:
IC EZ80 MPU 100LQFP
Manufacturer:
Zilog
Datasheet:
Part Number:
Description:
IC EZ80 MPU 100LQFP
Manufacturer:
Zilog
Datasheet:
Part Number:
Description:
IC EZ80 MPU 100LQFP
Manufacturer:
Zilog
Datasheet:
Part Number:
Description:
IC EZ80 MPU 100LQFP
Manufacturer:
Zilog
Datasheet:
Part Number:
Description:
IC EZ80 ACCLAIM 50MHZ 100LQFP
Manufacturer:
Zilog
Datasheet:
Part Number:
Description:
IC EZ80 ACCLAIM 50MHZ 100LQFP
Manufacturer:
Zilog
Datasheet:
Part Number:
Description:
IC WEBSERVER 20MHZ 100LQFP
Manufacturer:
Zilog
Datasheet:
Part Number:
Description:
IC WEBSERVER 50MHZ 100LQFP
Manufacturer:
Zilog
Datasheet:
Part Number:
Description:
IC WEBSERVER 8 BIT 50MHZ 100LQFP
Manufacturer:
Zilog
Datasheet:
Part Number:
Description:
IC WEBSERVER 50MHZ 100LQFP
Manufacturer:
Zilog
Datasheet:
Part Number:
Description:
IC WEBSERVER 50MHZ XTEMP 100LQFP
Manufacturer:
Zilog
Datasheet:
Part Number:
Description:
IC WEBSERVER 20MHZ 100LQFP
Manufacturer:
Zilog
Datasheet:
Part Number:
Description:
IC ACCLAIM MCU 64KB 100LQFP
Manufacturer:
Zilog
Datasheet:
Part Number:
Description:
IC ACCLAIM MCU 64KB 100LQFP
Manufacturer:
Zilog
Datasheet: