Datasheet

71M6541D/F/G and 71M6542F/G Data Sheet
42 Rev 4
• The interrupt priority registers: IP0 and IP1 (see Table 36).
Table 26: The IEN0 Bit Functions (SFR 0xA8)
Bit
Symbol
Function
IEN0[7]
EAL
EAL = 0 disables all interrupts.
IEN0[6]
–
Not used.
IEN0[5]
–
Not used.
IEN0[4]
ES0
ES0 = 0 disables serial channel 0 interrupt.
IEN0[3]
ET1
ET1 = 0 disables timer 1 overflow interrupt.
IEN0[2]
EX1
EX1 = 0 disables external interrupt 1: DIO status change
IEN0[1]
ET0
ET0 = 0 disables timer 0 overflow interrupt.
IEN0[0]
EX0
EX0 = 0 disables external interrupt 0: DIO status change
Table 27: The IEN1 Bit Functions (SFR 0xB8)
Bit
Symbol
Function
IEN1[7]
–
Not used.
IEN1[6]
–
Not used.
IEN1[5]
EX6
EX6 = 0 disables external interrupt 6:
XFER_BUSY, RTC_1S, RTC_1M or RTC_T
IEN1[4]
EX5
EX5 = 0 disables external interrupt 5: EEPROM or SPI
IEN1[3]
EX4
EX4 = 0 disables external interrupt 4: VSTAT
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.