ez80f92 ZiLOG Semiconductor, ez80f92 Datasheet - Page 86

• Manufacturer Part Number: ez80f92
• Description: Ez80acclaim Flash Microcontrollers
• Manufacturer: ZiLOG Semiconductor

PS015313-0508
PRT Count
(Clock
PRT Clock
Interrupt
Request
IOWRN
Value
CLK
4)
Table 30. PRT CONTINUOUS Mode Operation Example
Reading the Current Count Value
The CPU is capable of reading the current count value while the timer is running. This
Read event does not affect timer operation. The High byte of the current count value is
latched during a Read of the Low byte.
Timer Interrupts
The timer interrupt flag, PRT_IRQ, is set to 1 whenever the timer reaches its end-of-count
value,
CONTINUOUS mode. The interrupt flag is only set when the timer reaches
reloads) from
the value
The CPU can be programmed to poll the PRT_IRQ bit for the time-out event. Alterna-
tively, an interrupt service request signal can be sent to the CPU by setting IRQ_EN to 1.
Parameter
PRT Enabled
Reload and Restart Enabled
PRT Clock Divider = 4
CONTINUOUS Mode
PRT Interrupt Enabled
PRT Reload Value
0000h
Figure 22. PRT CONTINUOUS Mode Operation Example
0000h
X
, in SINGLE PASS mode, or when the timer reloads the start value in
0001h
, which selects the maximum time-out period.
I/O Write to TMRx_CTL Enables PRT
. The timer interrupt flag is not set to 1 when the timer is loaded with
4
3
Control Register(s)
TMRx_CTL[0]
TMRx_CTL[1]
TMRx_CTL[3:2]
TMRx_CTL[4]
TMRx_CTL[6]
{TMRx_RR_H, TMRx_RR_L}
2
1
Programmable Reload Timers
Product Specification
4
eZ80F92/eZ80F93
0000h
Value
1
1
00b
1
1
0004h
3
(or
79