EZ80F91AZ050EG Zilog, EZ80F91AZ050EG Datasheet - Page 102

• Manufacturer Part Number: EZ80F91AZ050EG
• Description: IC ACCLAIM MCU 256KB 144LQFP
• Manufacturer: Zilog
• Series: eZ80® Acclaim!®r

Specifications of EZ80F91AZ050EG

• Core Processor: Z8
• Core Size: 8-Bit
• Speed: 50MHz
• Connectivity: Ethernet, I²C, IrDA, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 144-LQFP
• Processor Series: EZ80F91x
• Core: eZ80
• Data Bus Width: 8 bit
• Data Ram Size: 16 KB
• Interface Type: I2C, IrDA, SPI, UART
• Maximum Clock Frequency: 50 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 4
• Operating Supply Voltage: 3 V to 3.6 V
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Development Tools By Supplier: eZ80F910300ZCOG
• Minimum Operating Temperature: - 40 C
• For Use With: 269-4712 - KIT DEV ENCORE 32 SERIES269-4671 - BOARD ZDOTS SBC Z80ACCLAIM PLUS269-4561 - KIT DEV FOR EZ80F91 W/C-COMPILER269-4560 - KIT DEV FOR EZ80F91 W/C-COMPILER
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Details
• Other names: 269-3867; EZ80F91AZ050EG

Random Access Memory
PS019215-0910
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 EMAC. RAM is
enabled or disabled, and it is 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 executes with zero or one Wait
states.
General-purpose RAM occupies memory addresses in the RAM Address Upper Byte reg-
ister in the range
EMAC RAM occupies memory addresses in the range
to
RAM_ADDR_U is set to
this example, RAM_ADDR_U is set to
occupies only a very small fraction of the available 16 MB address space.
When enabled, on-chip RAM assumes priority over on-chip Flash memory and any mem-
ory chip selects that is also enabled in the same address space. If an address is generated in
a range that is covered by both the RAM address space and a particular memory chip
{RAM_ADDR_U[7:0], DFFFh}.
Figure 22. Example: eZ80F91 On-Chip RAM Memory Addressing
7ADFFFh
FFFFFFh
7AFFFFh
7AC000h
7AE000h
000000h
{RAM_ADDR_U[7:0], E000h}
Location
Memory
FFh
.
Figure 22
General-Purpose
EMAC SRAM
Following a RESET, RAM is enabled when
8 KB
RAM
8 KB
7Ah
displays a memory map for on-chip RAM. In
.
Figure 22
to
{RAM_ADDR_U[7:0], FFFFh}.
{RAM_ADDR_U[7:0], C000h}
is not drawn to scale, as RAM
RAM_ADDR_U
7Ah
Product Specification
Random Access Memory
eZ80F91 MCU
93