ez80f92 ZiLOG Semiconductor, ez80f92 Datasheet - Page 88

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

PS015313-0508
PRT Count
(Clock
PRT Clock
Programmable Reload Timer Registers
IOWRN
Output
Value
Timer
CLK
4)
Table 31. PRT Timer Out Operation Example
Each programmable reload timer is controlled using five 8-bit registers. These registers
are the Timer Control register, Timer Reload Low Byte register, Timer Reload High Byte
register, Timer Data Low Byte register, and Timer Data High Byte register.
The Timer Control register can be read or written to. The timer reload registers are Write
Only and are located at the same I/O address as the timer data registers, which are Read
Only.
Timer Control Register
The Timer Control register, listed in
the timer, including enabling the timer, selecting the clock divider, enabling the interrupt,
selecting between CONTINUOUS and SINGLE PASS modes, and enabling the auto-
reload feature.
Parameter
PRT Enabled
Reload and Restart Enabled
PRT Clock Divider = 4
CONTINUOUS Mode
PRT Reload Value
Figure 23. PRT Timer Output Operation Example
X
I/O Write to TMRx_CTL Enables PRT
3
2
Table 32
Control Register(s)
TMRx_CTL[0]
TMRx_CTL[1]
TMRx_CTL[3:2]
TMRx_CTL[4]
{TMRx_RR_H, TMRx_RR_L}
on page 82, is used to control operation of
1
3
Programmable Reload Timers
Product Specification
2
eZ80F92/eZ80F93
Value
1
1
00b
1
0003h
1
81