71M6533 Datasheet, PDF (32/124 Pages) Teridian Semiconductor Corporation – Energy Meter IC

71M6533/71M6534 Data Sheet
Bit
TCON[7]
TCON[6]
TCON[5]
TCON[4]
TCON[3]
TCON[2]
TCON[1]
TCON[0]
Table 27: TCON Bit Functions (SFR 0x88)
Symbol
TF1
TR1
TF0
TR0
IE1
IT1
IE0
IT0
Function
Timer 1 overflow flag.
Not used for interrupt control.
Timer 0 overflow flag.
Not used for interrupt control.
External interrupt 1 flag.
External interrupt 1 type control bit:
0 = interrupt on low level.
1 = interrupt on falling edge.
External interrupt 0 flag
External interrupt 0 type control bit:
0 = interrupt on low level.
1 = interrupt on falling edge.
Table 28: The T2CON Bit Functions (SFR 0xC8)
Bit
T2CON[7]
T2CON[6]
T2CON[5]
T2CON[4:0]
Symbol
–
I3FR
I2FR
–
Function
Not used.
Polarity control for INT3:
0 = falling edge.
1 = rising edge.
Polarity control for INT2:
0 = falling edge.
1 = rising edge.
Not used.
FDS_6533_6534_004
Bit
IRCON[7]
IRCON[6]
IRCON[5]
IRCON[4]
IRCON[3]
IRCON[2]
IRCON[1]
IRCON[0]
Table 29: The IRCON Bit Functions (SFR 0xC0)
Symbol
–
–
IEX6
IEX5
IEX4
IEX3
IEX2
–
Function
Not used
Not used
1 = External interrupt 6 occurred and has not been cleared.
1 = External interrupt 5 occurred and has not been cleared.
1 = External interrupt 4 occurred and has not been cleared.
1 = External interrupt 3 occurred and has not been cleared.
1 = External interrupt 2 occurred and has not been cleared.
Not used.
TF0 and TF1 (Timer 0 and Timer 1 overflow flags) 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).
External MPU Interrupts
External interrupts are the interrupts external to the 80515 core, i.e. signals that originate in other parts of
the 71M6533/71M6534, for example the CE, DIO, RTC, EEPROM interface.
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