Rainbow Electronics 71M6542G - Manual (Page 42)

42 © 2008–2011 Teridian Semiconductor Corporation v1.1
IEN1[2] EX3 EX3 = 0 disables external interrupt 3: CE_BUSY
IEN1[1] EX2 EX2 = 0 disables external interrupt 2:
XPULSE, YPULSE, WPULSE or VPULSE
IEN1[0] – Not Used.
Table 28: The IEN2 Bit Functions (SFR 0x9A)
Bit Symbol Function
IEN2[0] ES1 ES1 = 0 disables the serial channel 1 interrupt.
Table 29: TCON Bit Functions (SFR 0x88)
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: DIO status changed
TCON[2] IT1 External interrupt 1 type control bit:
0 = interrupt on low level.
1 = interrupt on falling edge.
TCON[1] IE0 External interrupt 0 flag: DIO status changed
TCON[0] IT0 External interrupt 0 type control bit:
0 = interrupt on low level.
1 = interrupt on falling edge.
Table 30: The T2CON Bit Functions (SFR 0xC8)
Bit Symbol Function
T2CON[7] – Not used.
T2CON[6] I3FR Polarity control for external interrupt 3: CE_BUSY
0 = falling edge.
1 = rising edge.
T2CON[5] I2FR Polarity control for external interrupt 2:
XPULSE, YPULSE, WPULSE and VPULSE
0 = falling edge.
1 = rising edge.
T2CON[4:0] – Not used.
Table 31: The IRCON Bit Functions (SFR 0xC0)
Bit Symbol Function
IRCON[7] – Not used
IRCON[6] – Not used
IRCON[5] IEX6 1 = External interrupt 6 occurred and has not been cleared:
XFER_BUSY, RTC_1S, RTC_1M or RTC_T
IRCON[4] IEX5 1 = External interrupt 5 occurred and has not been cleared:
EEPROM or SPI
IRCON[3] IEX4 1 = External interrupt 4 occurred and has not been cleared:
VSTAT
IRCON[2] IEX3 1 = External interrupt 3 occurred and has not been cleared:
CE_BUSY