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Rev. 1.20
120
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Rev. 1.20
121
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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
•
TM2C1 Register – 16-bit STM
Bit
7
6
5
4
3
2
1
0
Name
T2M1
T2M0
T2I�1
T2I�0
T2�C
T2P�L
T2DPX
T2CCLR
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
P�R
0
0
0
0
0
0
0
0
Bit 7~6
T2M1~T2M0:
Select TM2 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 T2M1 and T2M0
bits. In the Timer/Counter Mode, the TM output pin control must be disabled.
Bit 5~4
T2IO1~T2IO0:
Select TP2_0, TP2_1 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 TP2_0, TP2_1
01: Input capture at falling edge of TP2_0, TP2_1
10: Input capture at falling/rising edge of TP2_0, TP2_1
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 T2IO1 and T2IO0 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 T2OC bit in the TM2C1 register. Note that the output
level requested by the T2IO1 and T2IO0 bits must be different from the initial value
setup using the T2OC 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 T2ON bit from low to high.
In the PWM Mode, the T2IO1 and T2IO0 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 only change
the values of the T2IO1 and T2IO0 bits only after the TM has been switched off.
Unpredictable PWM outputs will occur if the T2IO1 and T2IO0 bits are changed when
the TM is running.