Rev. 2.10
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Rev. 2.10
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HT68F20/HT68F30/HT68F40/HT68F50/HT68F60
HT68FU30/HT68FU40/HT68FU50/HT68FU60
Enhanced I/O Flash Type 8-Bit MCU with EEPROM
HT68F20/HT68F30/HT68F40/HT68F50/HT68F60
HT68FU30/HT68FU40/HT68FU50/HT68FU60
Enhanced I/O Flash Type 8-Bit MCU with EEPROM
•
TM1C2 Register – 10-bit ETM
Bit
7
6
5
4
3
2
1
0
Name
T1BM1
T1BM0
T1BIO1
T1BIO0
T1BOC
T1BPOL T1PWM1 T1PWM0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R
R/W
POR
0
0
0
0
0
0
0
0
Bit 7~6
T1BM1~T1BM0
: Select TM1 CCRB 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 T1BM1 and
T1BM0 bits. In the Timer/Counter Mode, the TM output pin control must be disabled.
Bit 5~4
T1BIO1~T1BIO0
: Select TP1B_0, TP1B_1, TP1B_2 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 TP1B_0, TP1B_1, TP1B_2
01: Input capture at falling edge of TP1B_0, TP1B_1, TP1B_2
10: Input capture at falling/rising edge of TP1B_0, TP1B_1, TP1B_2
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 T1BIO1 and T1BIO0 bits determine how
the TM output pin changes state when a compare match occurs from the Comparator
B. 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 B. 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 T1BOC bit in the TM1C2 register. Note that the output
level requested by the T1BIO1 and T1BIO0 bits must be different from the initial
value setup using the T1BOC 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 T1BIO1 and T1BIO0 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
T1BIO1 and T1BIO0 bits only after the TM has been switched off. Unpredictable PWM
outputs will occur if the T1BIO1 and T1BIO0 bits are changed when the TM is running.