EZ80L92AZ050EG Zilog, EZ80L92AZ050EG Datasheet - Page 83
EZ80L92AZ050EG
Manufacturer Part Number
EZ80L92AZ050EG
Description
IC WEBSERVER 50MHZ 100LQFP
Manufacturer
Zilog
Datasheet
1.EZ80L92AZ020SG.pdf
(231 pages)
Specifications of EZ80L92AZ050EG
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
+ 105 C
Mounting Style
SMD/SMT
Development Tools By Supplier
eZ80L920210ZCO
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
269-3877
EZ80L92AZ050EG
EZ80L92AZ050EG
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Programmable Reload Timers
PS013014-0107
System Clock
RTC Source
GPIO Pin
Programmable Reload Timer Operation
(Timers 0—3
The eZ80L92 MCU features six Programmable Reload Timers (PRT). Each PRT contains
a 16-bit downcounter and a 16-bit reload register. In addition, each PRT features a clock
prescaler with four selectable taps for CLK ÷ 4, CLK ÷ 16, CLK ÷ 64, and CLK ÷ 256.
Each timer can be individually enabled to operate in either SINGLE PASS or
CONTINUOUS mode. The timer can be programmed to start, stop, restart from the
current value, or restart from the initial value, and generate interrupts to the CPU.
Four of the Programmable Reload Timers (timers 0–3) feature a selectable clock source
input. The input for these timers can be either the system clock or the Real-Time Clock
(RTC) source. Timers 0–3 can also be used for event counting, with their inputs received
from a GPIO port pin. Output from timers 4 and 5 can be directed to a GPIO port pin.
Each of the six PRTs available on the eZ80L92 can be controlled individually. They do not
share the same counters, reload registers, control registers, or interrupt signals.
A simplified block diagram of a programmable reload timer is illustrated in
Setting Timer Duration
There are three factors to consider when determining Programmable Reload Timer
duration—clock frequency, clock divider ratio, and initial count value. Minimum duration
TMRx_IN
only)
2
Figure 18. Programmable Reload Timer Block Diagram
TMRx_CTL[3:2]
Adjustable
Prescaler
Clock
2
{TMRx_DR_H, TMRx_DR_L}
{TMRx_RR_H, TMRx_RR_L}
Reload Registers
Data Registers
Down Counter
Data[7:0]
Data[7:0]
16-Bit
Control Register
Control Logic
TMRx_CTL
Data[7:0]
PRT
(Timers 4—5 only)
Programmable Reload Timers
TOUT_EN
Product Specification
eZ80L92 MCU
IRQ to eZ80 CPU
Timer Out
Figure
18.
77
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