COP8-PGMA-DS44P National Semiconductor, COP8-PGMA-DS44P Datasheet - Page 16

• Manufacturer Part Number: COP8-PGMA-DS44P
• Description: PGMR ADAPTER/COP8 DIP,SOIC,PLCC
• Manufacturer: National Semiconductor

Specifications of COP8-PGMA-DS44P

• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: *COP8-PGMA-DS44P

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Functional Description
CNTRL
7 6 5
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
Bits
FIGURE 9. Timer/Counter Auto
Reload Mode Block Diagram
External Counter W/Auto-Load Reg.
External Counter W/Auto-Load Reg.
Not Allowed
Not Allowed
Timer W/Auto-Load Reg.
Timer W/Auto-Load Reg./Toggle TIO Out
Timer W/Capture Register
Timer W/Capture Register
Operation Mode
(Continued)
FIGURE 8. MICROWIRE/PLUS Application
TABLE 5. Timer Operating Modes
DS010802-11
16
TIMER PWM APPLICATION
Figure 11 shows how a minimal component D/A converter
can be built out of the Timer-Register pair in the Auto-Reload
mode. The timer is placed in the “Timer with auto reload”
mode and the TIO pin is selected as the timer output. At the
outset the TIO pin is set high, the timer T1 holds the on time
and the register R1 holds the signal off time. Setting TRUN
bit starts the timer which counts down at the instruction cycle
rate. The underflow toggles the TIO output and copies the off
Timer Underflow
Timer Underflow
Not Allowed
Not Allowed
Timer Underflow
Timer Underflow
TIO Pos. Edge
TIO Neg. Edge
FIGURE 10. Timer Capture Mode Block Diagram
T Interrupt
TIO Pos. Edge
TIO Neg. Edge
Not Allowed
Not Allowed
t
t
t
t
C
C
C
C
DS010802-10
Counts
Timer
On
DS010802-12