DS_1209F_004
73S1209F Data Sheet
Rev. 1.2
35
Timer/Counter Control Register (TCON): 0x88
Å
0x00
Table 22: The TCON Register
MSB LSB
TF1 TR1 TF0 TR0 IE1 IT1 IE0 IT0
Bit Symbol
Function
TCON.7
TF1
Timer 1 overflow flag.
TCON.6
TR1
Not used for interrupt control.
TCON.5
TF0
Timer 0 overflow flag.
TCON.4
TR0
Not used for interrupt control.
TCON.3
IE1
Interrupt 1 edge flag is set by hardware when the falling edge on external
interrupt int1 is observed. Cleared when an interrupt is processed.
TCON.2
IT1
Interrupt 1 type control bit. 1 selects falling edge and 0 selects low level for
input pin to cause an interrupt.
TCON.1
IE0
Interrupt 0 edge flag is set by hardware when the falling edge on external
interrupt int0 is observed. Cleared when an interrupt is processed.
TCON.0
IT0
Interrupt 0 type control bit. 1 selects falling edge and 0 sets low level for input
pin to cause interrupt.
Timer/Interrupt 2 Control Register (T2CON): 0xC8
Å
0x00
Table 23: The T2CON Register
MSB LSB
–
I3FR
I2FR
– – – – –
Bit Symbol
Function
T2CON.7 –
T2CON.6 I3FR
External interrupt 3 failing/rising edge flag.
I3FR = 0 external interrupt 3 negative transition active.
I3FR = 1 external interrupt 3 positive transition active.
T2CON.5 I2FR
External interrupt 3 failing/rising edge flag.
I2FR = 0 external interrupt 3 negative transition active.
I2FR = 1 external interrupt 3 positive transition active.
T2CON.4 –
T2CON.3 –
T2CON.2 –
T2CON.1 –
T2CON.0 –