t6020m ATMEL Corporation, t6020m Datasheet - Page 35

• Manufacturer Part Number: t6020m
• Description: Low-current Microcontroller For Watchdog Function
• Manufacturer: ATMEL Corporation

Timer 2 Mode Register 1 (T2M1)
Duty Cycle Generator
The duty cycle generator generates duty cycles from 25%, 33% or 50%. The frequency at the duty cycle generator
output depends on the duty cycle and the Timer 2 prescaler setting. The DCG-stage can also be used as additional
programmable prescaler for Timer 2.
Rev. A3, 02-Apr-01
T2M1
T2D1
T2D0
T2MS1
T2MS0
DCGO0
DCGO1
DCGO2
DCGO3
DCGIN
Timer 2 Mode Select bit 1
Timer 2 Mode Select bit 0
Timer 2 Duty cycle bit 1
Timer 2 Duty cycle bit 0
Mode
T2D1
1
2
3
4
1
1
0
0
T2MS1
T2D1
Bit 3
1
1
0
0
T2D0
1
0
1
0
T2MS0
T2D0
Bit 2
1
0
1
0
Bypassed (DCGO0)
Duty cycle 1/1 (DCGO1)
Duty cycle 1/2 (DCGO2)
Duty cycle 1/3 (DCGO3)
Function of Duty Cycle Generator (DCG)
4-bit counter overflow (OVF1)
4-bit compare output (CM1)
4-bit compare output (CM1)
4-bit compare output (CM1)
Figure 39. DCG output signals
T2MS1
Bit 1
Clock Output (POUT)
T2MS0
Bit 0
Address: ’7’hex – Subaddress: ’1’hex
12-bit compare counter, the DCG
have to be bypassed in this mode
8-bit compare counter with 4-bit
programmable prescaler and duty
cycle generator
8-bit compare counter clocked by
SYSCL or the external clock input
T2I, 4-bit prescaler run, the
counter 2/1 starts after writing
mode 3
8-bit compare counter clocked by
SYSCL or the external clock input
T2I, 4-bit prescaler stop and resets
Additional Divider Effect
Timer 2 Modes
T6020M
Reset value: 1111b
/ 1
/ 2
/ 3
/ 4
13807
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