EZ80190AZ050SC00TR Zilog, EZ80190AZ050SC00TR Datasheet - Page 69

• Manufacturer Part Number: EZ80190AZ050SC00TR
• Description: IC EZ80 ACCLAIM 50MHZ 100LQFP
• Manufacturer: Zilog

Specifications of EZ80190AZ050SC00TR

• Processor Type: eZ80
• Features: High Speed, Single-Cycle Instruction-Fetch
• Speed: 50MHz
• Voltage: 3.3V
• Mounting Type: Surface Mount
• Package / Case: 100-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Random Access Memory
PS006614-1208
The eZ80190 device features an 8 KB x 8 single-port data Random Access Memory
(RAM) for general-purpose use and a 1 KB x 8 dual-port static RAM for use with the
Multiply-Accumulator unit. Both RAM spaces can be individually enabled or disabled,
and can be relocated to the top of any 64 KB page in memory. Data is passed to and from
the two RAM spaces via the 8-bit data bus, DATA[7:0]. The dual-port MACC RAM can
be used with the Multiply-Accumulator or as additional general-purpose RAM, if
required. For details about using the MACC RAM with the Multiply-Accumulator, see
MACC RAM
The general-purpose data RAM occupies the memory addresses range
{RAM_ADDR_U[7:0], E000h} to {RAM_ADDR_U[7:0], FFFFh}.
Accumulator dual-port RAM occupies the address range
to {RAM_ADDR_U[7:0], DFFFh}
chip RAM spaces is displayed in
Byte register, RAM_ADDR_U, is set to
memories occupy only a very small fraction of the available 16 MB address space.
When enabled, on-chip RAM assumes priority over all Memory Chip Selects that may
also be enabled in the same address space. If an address is generated in a range that is cov-
ered by both the RAM address space and a particular Memory Chip Select address space,
the Memory Chip Select is not activated.
000000h
7ADFFFh
7ADC00h
FFFFFFh
7AFFFFh
7AE000h
Location
Memory
on page 125.
1 KB MACC RAM
General-Purpose
8 KB
RAM
Figure 10. On-Chip RAM Memory Addressing Example
Figure
. An example of the memory mapping for the two on-
10. In this example, the RAM Address Upper
7Ah
RAM_ADDR_U
.
Figure 10
7Ah
is not drawn to scale, as RAM
{RAM_ADDR_U[7:0], DC00h}
Product Specification
Random Access Memory
The Multiply-
eZ80190
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