ATA6020N ATMEL Corporation, ATA6020N Datasheet - Page 37

• Manufacturer Part Number: ATA6020N
• Description: Low-current Microcontroller For Watchdog Function
• Manufacturer: ATMEL Corporation

5.2.6.4
4708D–4BMCU–09/05
Timer 2 Registers
Timer 2 Output Mode 5
Manchester Modulator: Timer 2 modulates the SSI internal data output (SO) to Manchester
code.
Figure 5-20. Manchester Modulation
Timer 2 Output Mode 7
PWM Mode: Pulse-width modulation output on Timer 2 output pin (T2O)
In this mode the timer overflow defines the period and the compare register defines the duty
cycle. During one period only the first compare match occurrence is used to toggle the timer out-
put flip-flop, until overflow occur all further compare match are ignored. This avoids the situation
that changing the compare register causes the occurrence of several compare match during one
period. The resolution at the pulse-width modulation Timer 2 mode 1 is 12-bit and all other Timer
2 modes are 8-bit.
Figure 5-21. PWM Modulation
Timer 2 has 6 control registers to configure the timer mode, the time interval, the input clock and
its output function. All registers are indirectly addressed using extended addressing as
described in section
BP41 or BP42 must be selected with the Port 4 control register P4CR, if one of the Timer 2
modes require an input at T2I/BP41 or an output at T2O/BP42.
Input clock
Counter 2/2
Counter 2/2
OVF2
INT4
CM2
T2R
T2O
TOG2
T2O
SC
SO
0
Data: 00110101
Bit 7
Bit 7
0
0
T1
“Addressing Peripherals” on page
0
50
compare value
load the next
T
0
0
255
1
0
1
T2
100
1
T2CO2=150
1
8-bit SR-Data
T
255 0
0
0
T3
20. The alternate functions of the Ports
1
150
T
1
load
255 0 50
0
T1
0
load
1
T
Bit 0
Bit 0
1
ATA6020N
255 0
T2
100
T
37