71M6531D Datasheet, PDF (32/115 Pages) Teridian Semiconductor Corporation – Energy Meter IC

Data Sheet 71M6531D/F-71M6532D/F
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.
FDS 6531/6532 005
Table 28: The T2CON Bit Functions (SFR 0xC8)
Bit
T2CON[7]
T2CON[6]
T2CON[5]
T2CON[4:0]
Symbol
–
I3FR
I2FR
–
Not used.
Polarity control for INT3:
0 = falling edge.
1 = rising edge.
Polarity control for INT2:
0 = falling edge.
1 = rising edge.
Not used.
Function
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
–
Not used
Function
–
Not used
IEX6
IEX5
IEX4
IEX3
IEX2
–
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 71M6531D/F or 71M6532D/F, for example the CE, DIO, RTC, EEPROM interface.
32
© 2005-2009 TERIDIAN Semiconductor Corporation
v1.2