71M6521BE Datasheet, PDF (32/97 Pages) Teridian Semiconductor Corporation – Energy Meter IC

Timer2/Counter2 Control register (T2CON):
71M6521BE
Energy Meter IC
DATA SHEET
JANUARY 2008
Bit
T2CON.7
T2CON.6
T2CON.5
TCON.4 …
T2CON0
Symbol
--
I3FR
I2FR
--
Function
Not used
Polarity control for INT3: 0 - falling edge, 1 – rising edge
Polarity control for INT3: 0 - falling edge, 1 – rising edge
Not used
Table 42: The T2CON Bit Functions
Interrupt Request register (IRCON)
MSB
LSB
EX6
IEX5
IEX4
IEX3
IEX2
Table 43: The IRCON Register
Bit
IRCON.7
IRCON.6
IRCON.5
IRCON.4
IRCON.3
IRCON.2
IRCON.1
IRCON.0
Symbol
-
-
IEX6
IEX5
IEX4
IEX3
IEX2
-
Function
External interrupt 6 edge flag
External interrupt 5 edge flag
External interrupt 4 edge flag
External interrupt 3 edge flag
External interrupt 2 edge flag
Table 44: The IRCON Bit Functions
Note: Only TF0 and TF1 (timer 0 and timer 1 overflow flag) will be automatically cleared by hardware when the
service routine is called (Signals T0ACK and T1ACK – port ISR – active high when the service routine is called).
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