COP8SE National Semiconductor, COP8SE Datasheet - Page 18

• Manufacturer Part Number: COP8SE
• Description: 8-Bit CMOS ROM Based and OTP Microcontrollers with 4k Memory and 128 Bytes EERAM
• Manufacturer: National Semiconductor

www.national.com
6.0 Timers
6.3 TIMER CONTROL FLAGS
The Timer T1 control bits and their functions are summarized
below.
T1C3
T1C2
T1C1
T1C0
The timer mode control bits (T1C3, T1C2 and T1C1) are detailed below:
Mode
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 Under-
flow Interrupt Pending Flag in Mode 3 (Input Cap-
ture)
T1C3
1
1
0
0
0
1
0
1
(Continued)
T1C2
0
0
0
0
1
1
1
1
T1C1
FIGURE 14. Timer in Input Capture Mode
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
18
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
Timer Interrupt Enable Flag
1 = Timer Interrupt Enabled
0 = Timer Interrupt Disabled
Timer Interrupt Enable Flag
1 = Timer Interrupt Enabled
0 = Timer Interrupt Disabled
Source
DS100973-48
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
C
C
C
C
C
C
Counts On
Timer