cop8fg National Semiconductor Corporation, cop8fg Datasheet - Page 21
cop8fg
Manufacturer Part Number
cop8fg
Description
8-bit Cmos Rom Based And Otp Microcontrollers With 8k To 32k Memory, Two Comparators And Usart
Manufacturer
National Semiconductor Corporation
Datasheet
1.COP8FG.pdf
(59 pages)
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6.0 Timers
6.3 TIMER CONTROL FLAGS
The control bits and their functions are summarized below.
The timer mode control bits (TxC3, TxC2 and TxC1) are detailed below:
Mode
TxC3
TxC2
TxC1
TxC0
1
2
3
Timer mode control
Timer mode control
Timer mode control
Timer Start/Stop control in Modes 1 and 2 (Pro-
cessor Independent PWM and External Event
Counter), where 1 = Start, 0 = Stop
Timer Underflow Interrupt Pending Flag in
Mode 3 (Input Capture)
TxC3
1
1
0
0
0
1
0
1
(Continued)
TxC2
0
0
0
0
1
1
1
1
TxC1
1
0
0
1
0
0
1
1
PWM: TxA Toggle
PWM: No TxA
Toggle
External Event
Counter
External Event
Counter
Captures:
TxA Pos. Edge
TxB Pos. Edge
Captures:
TxA Pos. Edge
TxB Neg. Edge
Captures:
TxA Neg. Edge
TxB Neg. Edge
Captures:
TxA Neg. Edge
TxB Neg. Edge
Description
21
TxPNDA Timer Interrupt Pending Flag
TxENA
TxPNDB Timer Interrupt Pending Flag
TxENB
Autoreload RA
Autoreload RA
Timer
Underflow
Timer
Underflow
Pos. TxA Edge
or Timer
Underflow
Pos. TxA
Edge or Timer
Underflow
Neg. TxA
Edge or Timer
Underflow
Neg. TxA
Edge or Timer
Underflow
Interrupt A
Source
Timer Interrupt Enable Flag
1 = Timer Interrupt Enabled
0 = Timer Interrupt Disabled
Timer Interrupt Enable Flag
1 = Timer Interrupt Enabled
0 = Timer Interrupt Disabled
Autoreload RB
Autoreload RB
Pos. TxB Edge
Pos. TxB Edge
Pos. TxB Edge
Neg. TxB
Edge
Neg. TxB
Edge
Neg. TxB
Edge
Interrupt B
Source
t
Pos. TxA
Edge
Pos. TxA
Edge
t
t
t
t
t
www.national.com
C
C
C
C
C
C
Counts On
Timer
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