ATAM893X-TKHYZ ATMEL [ATMEL Corporation], ATAM893X-TKHYZ Datasheet - Page 38

• Manufacturer Part Number: ATAM893X-TKHYZ
• Description: Flash Version for ATAR080, ATAR090/890 and ATAR092/892
• Manufacturer: ATMEL [ATMEL Corporation]

Figure 5-12. 8-bit Compare Counter
Figure 5-13. 4-/8-bit Compare Counter
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CL2/1
ATAM893-D
T1OUT
T2I
SYSCL
SYSCL
TOG3
SCL
4-bit compare
4-bit counter
4-bit register
P4CR
T2CS1, 0
P41M2, 1
MUX
CL2/2
Mode 2: 8-bit Compare Counter with 4-bit Programmable Prescaler
The 4-bit stage is used as a programmable prescaler for the 8-bit counter stage. In this mode, a
duty cycle stage is also available. This stage can be used as an additional 2-bit prescaler or for
generating duty cycles of 25%, 33% and 50%. The 4-bit compare output (CM1) supplies the
clock output (POUT) with clocks.
RES
Mode 3/4: 8-bit Compare Counter and 4-bit Programmable Prescaler
In these modes the 4-bit and the 8-bit counter stages work independently as a 4-bit prescaler
and an 8-bit timer with an 2-bit prescaler or as a duty cycle generator. Only in the mode 3 and
mode 4, can the 8-bit counter be supplied via the external clock input (T2I) which is selected via
the P4CR register. The 4-bit prescaler is started via activating of mode 3 and stopped and reset
in mode 4. Changing mode 3 and 4 has no effect for the 8-bit timer stage. The 4-bit stage can be
used as prescaler for Timer 3, the SSI or to generate the stop signal for modulator 2 and
modulator 3.
CL2/1
CM1
T2D1, 0
DCG
T2D1, 0
DCG
POUT
8-bit compare
4-bit compare
8-bit counter
8-bit register
4-bit counter
4-bit register
8-bit compare
8-bit counter
8-bit register
RES
RES
OVF2
CM2
CM1
RES
T2RM
OVF2
CM2
T2RM
T2OTM
T2OTM
and T2OTM-bit
output mode
Timer 2
and T2OTM-bit
output mode
Timer 2
T2IM
T2IM
T2CTM
T2CTM
DCGO
TOG2
INT4
POUT
4680C–4BMCU–01/05
DCGO
TOG2
INT4