EZ80F93AZ020SC00TR Zilog, EZ80F93AZ020SC00TR Datasheet - Page 59
![IC ACCLAIM MCU 64KB 100LQFP](/photos/6/76/67664/269-100-lqfp_sml.jpg)
EZ80F93AZ020SC00TR
Manufacturer Part Number
EZ80F93AZ020SC00TR
Description
IC ACCLAIM MCU 64KB 100LQFP
Manufacturer
Zilog
Series
eZ80® Acclaim!®r
Specifications of EZ80F93AZ020SC00TR
Core Processor
Z8
Core Size
8-Bit
Speed
20MHz
Connectivity
I²C, IrDA, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, WDT
Number Of I /o
24
Program Memory Size
64KB (64K x 8)
Program Memory Type
FLASH
Ram Size
4K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Oscillator Type
Internal
Operating Temperature
0°C ~ 70°C
Package / Case
100-LQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Data Converters
-
Other names
EZ80F93AZ020SC00T
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Manufacturer
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eZ80F92/eZ80F93
Product Specification
52
An example of WAIT state operation is displayed in
Figure
8. In this example, the Chip
Select is configured to provide a single WAIT state. The external peripheral being
accessed drives the WAIT pin Low to request assertion of an additional WAIT state. If the
WAIT pin is asserted for additional system clock cycles, WAIT states are added until the
WAIT pin is deasserted (High).
T
T
CLK
WAIT
X
IN
ADDR[23:0]
DATA[7:0]
(output)
CSx
MREQ
RD
INSTRD
Figure 8. Example: Wait State Operation Read Operation
Chip Selects During Bus Request/Bus Acknowledge Cycles
When the CPU relinquishes the address bus to an external peripheral in response to an
external bus request (BUSREQ), it drives the bus acknowledge pin (BUSACK) Low. The
external peripheral can then drive the address bus (and data bus). The CPU continues to
generate Chip Select signals in response to the address on the bus. External devices cannot
access the internal registers of the eZ80F92 device.
PS015313-0508
Chip Selects and Wait States
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