Maxim Integrated 71M6513H Power Meter IC Family Software - Manual (Page 128)

71M651x Software User’s Guide
Timer/Counter Control Register (TCON)
MSB LSB
tf1 tr1 tf0 tr0 ie1 it1 ie0 it0
Table 6-47: The TCON Register
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 External interrupt 1 flag
TCON.2 it1 External interrupt 1 type control bit
TCON.1 ie0 External interrupt 0 flag
TCON.0 it0 External interrupt 0 type control bit
Table 6-48: The TCON Bit Functions
Interrupt Request Register (IRCON)
MSB LSB
iex6 iex5 iex4 iex3 iex2
Table 6-49: The IRCON Register
Bit Symbol Function
IRCON.7 -
IRCON.6 -
IRCON.5 iex6 External interrupt 6 edge flag
IRCON.4 iex5 External interrupt 5 edge flag
IRCON.3 iex4 External interrupt 4 edge flag
IRCON.2 iex3 External interrupt 3 edge flag
IRCON.1 iex2 External interrupt 2 edge flag
IRCON.0 -
Table 6-50: The IRCON Bit Functions
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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