COP8SA National Semiconductor, COP8SA Datasheet - Page 23

• Manufacturer Part Number: COP8SA
• Description: 8-Bit CMOS ROM Based and One-Time Programmable OTP Microcontroller with 1k to 4k Memory/ Power On Reset/ and Very Small Packaging
• Manufacturer: National Semiconductor

7.0 Timers
7.3 TIMER CONTROL FLAGS
The control bits and their functions are summarized below.
The timer mode control bits (T1C3, T1C2 and T1C1) are detailed below:
Mode
T1C3
T1C2
T1C1
T1C0
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)
T1C3
1
1
0
0
0
1
0
1
(Continued)
T1C2
0
0
0
0
1
1
1
1
T1C1
1
0
0
1
0
0
1
1
PWM: T1A Toggle
PWM: No T1A
Toggle
External Event
Counter
External Event
Counter
Captures:
T1A Pos. Edge
T1B Pos. Edge
Captures:
T1A Pos. Edge
T1B Neg. Edge
Captures:
T1A Neg. Edge
T1B Neg. Edge
Captures:
T1A Neg. Edge
T1B Neg. Edge
Description
23
T1PNDA Timer Interrupt Pending Flag
T1ENA
T1PNDB Timer Interrupt Pending Flag
T1ENB
Autoreload RA
Autoreload RA
Timer
Underflow
Timer
Underflow
Pos. T1A Edge
or Timer
Underflow
Pos. T1A
Edge or Timer
Underflow
Neg. T1A
Edge or Timer
Underflow
Neg. T1A
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. T1B Edge
Pos. T1B Edge
Pos. T1B Edge
Neg. T1B
Edge
Neg. T1B
Edge
Neg. T1B
Edge
Interrupt B
Source
t
t
Pos. T1A
Edge
Pos. T1A
Edge
t
t
t
t
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C
C
C
C
C
C
Counts On
Timer