EZ80190AZ050SC00TR Zilog, EZ80190AZ050SC00TR Datasheet - Page 41

• 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

Programmable Reload Timers
Programmable Reload Timers Overview
PS006614-1208
Clock
TMRx_CTL[3:2]
The eZ80190 device 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 4-bit
clock prescaler with four selectable taps for CLK ÷ 2, CLK ÷ 4, CLK ÷ 8 and CLK ÷ 16.
Each timer can be individually enabled to operate in either SINGLE PASS or CONTINU-
OUS mode. The timer can be programmed to start, stop, restart from the current value, or
restart from the initial value, and generate interrupts for the CPU.
Each of the 6 PRTs available on the eZ80190 device can be controlled individually. They
do not share the same counters, reload registers, control registers, or interrupt signals.
Figure 3
Adustable
Divider
Clock
displays a simplified block diagram of a programmable reload timer.
Figure 3. Programmable Reload Timer Block Diagram
{TMRx_RR_H,TMRx_RR_L}
{TMRx_DR_H,TMRx_DR_L}
Reload Registers
Data Registers
Downcounter
Data[7:0]
Data[7:0]
16-bit
Control Register
Control Logic
TMRx_CTL
Data[7:0]
PRT
Programmable Reload Timers
Product Specification
eZ80
Interrupt to
eZ80190
®
CPU
31