EZ80L92AZ050SG Zilog, EZ80L92AZ050SG Datasheet - Page 169

IC WEBSERVER 50MHZ 100LQFP

EZ80L92AZ050SG

Manufacturer Part Number
EZ80L92AZ050SG
Description
IC WEBSERVER 50MHZ 100LQFP
Manufacturer
Zilog
Datasheet

Specifications of EZ80L92AZ050SG

Processor Type
eZ80
Features
High Speed, Single-Cycle Instruction-Fetch
Speed
50MHz
Voltage
3.3V
Mounting Type
Surface Mount
Package / Case
100-LQFP
Processor Series
EZ80L92x
Core
eZ80
Data Bus Width
8 bit
Program Memory Size
64 KB
Interface Type
I2C, SPI, UART
Maximum Clock Frequency
50 MHz
Number Of Programmable I/os
24
Number Of Timers
6
Operating Supply Voltage
3 V to 3.6 V
Maximum Operating Temperature
+ 70 C
Mounting Style
SMD/SMT
Development Tools By Supplier
eZ80L920210ZCO
Minimum Operating Temperature
0 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
269-3878
EZ80L92AZ050SG

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Manufacturer
Quantity
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Part Number:
EZ80L92AZ050SG
Manufacturer:
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eZ80L92 MCU
Product Specification
163
ZDI Data Out
ZDI Data Out
(Read)
(Read)
ZCL
ZDA
Start Signal
Figure 38. ZDI Read Timing
ZDI Single-Bit Byte Separator
Following each 8-bit ZDI data transfer, a single-bit byte separator is used. To initiate a
new ZDI command, the single-bit byte separator must be High (logical 1) to allow a new
ZDI START command to be sent. For all other cases, the single-bit byte separator is either
Low (logical 0) or High (logical 1). When ZDI is configured to allow the CPU to accept
external bus requests, the single-bit byte separator must be Low (logical 0) during all ZDI
commands. This Low value indicates that ZDI is still operating and is not ready to
relinquish the Bus. The CPU does not accept the external bus requests until the single-bit
byte separator is a High (logical 1). For more information on accepting bus requests in
ZDI DEBUG mode, see
Bus Requests During ZDI Debug Mode
on page 167.
ZDI Register Addressing
Following a START signal, the ZDI master must output the ZDI register address. All data
transfers with the ZDI block use special ZDI registers. The ZDI control registers that
reside in the ZDI register address space should not be confused with the eZ80L92 periph-
eral registers that reside in the I/O address space.
Many locations in the ZDI control register address space are shared by two registers, one
for Read-Only access and another one for Write-Only access. For example, a Read from
ZDI register address
returns the eZ80 Product ID Low Byte while a Write to this same
00h
location,
, stores the Low byte of one of the address match values used for generating
00h
break points.
The format for a ZDI address is seven bits of address, followed by one bit for Read or
Write control, and completed by a single-bit byte separator. The ZDI executes a Read or
Write operation depending on the state of the R/W bit (0 = Write, 1 = Read). If no new
START command is issued at completion of the Read or Write operation, the operation
PS013014-0107
ZiLOG Debug Interface

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