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Rev. 1.20
136
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Rev. 1.20
137
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HT69F30A/HT69F40A/HT69F50A
TinyPower
TM
I/O Flash 8-Bit MCU with LCD & EEPROM
HT69F30A/HT69F40A/HT69F50A
TinyPower
TM
I/O Flash 8-Bit MCU with LCD & EEPROM
TM1C1 Register – 10-bit ETM
Bit
7
6
5
4
3
2
1
0
Name
T1AM1
T1AM0
T1AI�1
T1AI�0
T1A�C
T1AP�L
T1CDN
T1CCLR
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R
R/W
P�R
0
0
0
0
0
0
0
0
Bit 7~6
T1AM1~T1AM0:
Select TM1 CCRA Operating Mode
00: Compare Match Output Mode
01: Capture Input Mode
10: PWM Mode or Single Pulse Output Mode
11: Timer/Counter Mode
These bits setup the required operating mode for the TM. To ensure reliable operation
the TM should be switched off before any changes are made to the T1AM1 and
T1AM0 bits. In the Timer/Counter Mode, the TM output pin control must be disabled.
Bit 5~4
T1AIO1~T1AIO0:
Select TP1A output function
Compare Match Output Mode
00: No change
01: Output low
10: Output high
11: Toggle output
PWM Mode/Single Pulse Output Mode
00: PWM output inactive state
01: PWM output active state
10: PWM output
11: Single pulse output
Capture Input Mode
00: Input capture at rising edge of TP1A
01: Input capture at falling edge of TP1A
10: Input capture at falling/rising edge of TP1A
11: Input capture disabled
Timer/counter Mode
Unused
These two bits are used to determine how the TM output pin changes state when a
certain condition is reached. The function that these bits select depends upon in which
mode the TM is running.
In the Compare Match Output Mode, the T1AIO1 and T1AIO0 bits determine how
the TM output pin changes state when a compare match occurs from the Comparator
A. The TM output pin can be setup to switch high, switch low or to toggle its present
state when a compare match occurs from the Comparator A. When the bits are both
zero, then no change will take place on the output. The initial value of the TM output
pin should be setup using the T1AOC bit in the TM1C1 register. Note that the output
level requested by the T1AIO1 and T1AIO0 bits must be different from the initial
value setup using the T1AOC bit otherwise no change will occur on the TM output pin
when a compare match occurs. After the TM output pin changes state it can be reset to
its initial level by changing the level of the T1ON bit from low to high.
In the PWM Mode, the T1AIO1 and T1AIO0 bits determine how the TM output pin
changes state when a certain compare match condition occurs. The PWM output
function is modified by changing these two bits. It is necessary to change the values of
the T1AIO1 and T1AIO0 bits only after the TM has been switched off. Unpredictable
PWM outputs will occur if the T1AIO1 and T1AIO0 bits are changed when the TM is
running.