NEC uPD78P078 - Manual (Page 196)

196
CHAPTER 8 16-BIT TIMER/EVENT COUNTER
(6) External interrupt mode register 0 (INTM0)
This register is used to set INTP0 to INTP2 valid edges.
INTM0 is set with an 8-bit memory manipulation instruction.
RESET input sets INTM0 value to 00H.
Figure 8-8. External Interrupt Mode Register 0 Format
Caution Set 0, 0, 0 to bits 1 through 3 (TMC01 through TMC03) of the 16-bit timer mode control
register (TMC0) and stop the timer operation before setting the valid edges of INTP0/TI00/
P00 pins.
ES31 ES30 ES21 ES20 ES11 ES10 0 0
7 6 5 4 3 2 1 0 Symbol
INTM0 FFECH 00H R/W
Address After Reset R/W
ES11 INTP0 Valid Edge Selection ES10
0 Falling edge 0
0 Rising edge 1
1 Setting prohibited 0
1 Both falling and rising edges 1
ES21 INTP1 Valid Edge Selection ES20
0 Falling edge 0
0 Rising edge 1
1 Setting prohibited 0
1 Both falling and rising edges 1
ES31 INTP2 Valid Edge Selection ES30
0 Falling edge 0
0 Rising edge 1
1 Setting prohibited 0
1 Both falling and rising edges 1