UPD784026 Renesas Electronics Corporation., UPD784026 Datasheet - Page 62

• Manufacturer Part Number: UPD784026
• Description: 16/8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

22
P20
P21
P22
P23
P24
P25
P26
P27
* NMI input is acknowledged regardless of whether interrupts are enabled or disabled.
Port
(a) Function as port pins
(b) Functions as control signal input pins
The pin level can always be read or tested regardless of the dual-function pin operation.
(i)
(ii)
Input port / NMI input*
Input port / INTP0 input / CR11 capture trigger input /
timer/counter 1 count clock / real-time output port trigger signal
Input port / INTP1 input / CR22 capture trigger input
Input port / INTP2 input / CI input
Input port / INTP3 input / CR02 capture trigger
timer/input/counter 0 count clock
Input port / INTP4 input / ASCK input / SCK1 input/output
Input port / INTP5 input / A/D converter external trigger input
Input port / SI0 input
NMI (Non-maskable Interrupt)
The external non-maskable interrupt request input pin. Rising edge detection or falling edge
detection can be specified by means of the external interrupt mode register 0 (INTM0).
INTP0 to INTP5 (Interrupt from Peripherals)
External interrupt request input pins. When the valid edge specified by the external interrupt mode register 0,
(INTM0/INTM1) is detected by pins INTP0 to INTP5, an interrupt is generated (see CHAPTER 19 EDGE
DETECTION FUNCTION).
In addition, pins INTP0 to INTP3 and INTP5 are also used as external trigger input pins with the various functions
shown below.
• INTP0 ....... Timer/counter 1 capture trigger input pin
• INTP1 ....... Timer/counter 2 capture trigger input pin to capture register (CR22)
• INTP2 ....... Timer/counter 2 external count clock input pin
• INTP3 ....... Timer/counter 0 capture trigger input pin
• INTP5 ....... A/D converter external trigger input pin
Timer/counter 1 external count clock input pin
Real-time output port trigger input pin
Capture trigger input pin to capture/compare register (CR21)
Timer/counter 0 external count clock input pin
Table 2-2 Port 2 Operating Modes
CHAPTER 2 PIN FUNCTIONS
Functions