upd78f9211grt2-jjg-a ETC-unknow, upd78f9211grt2-jjg-a Datasheet - Page 24

• Manufacturer Part Number: upd78f9211grt2-jjg-a
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: ETC-unknow

2.2.2 P32 and P34 (Port 3)
interrupt request signal.
reset function.
2.2.3 P40 to P47 (Port 4)
mode register 4 (PM4). In addition, an on-chip pull-up resistor can be connected to the port by using pull-up resistor
option register 4 (PU4).
2.2.4 RESET
regardless of the option byte setting.
2.2.5 X1 and X2
CHAPTER 15 OPTION BYTE.
2.2.6 V
converter, stabilize V
2.2.7 V
24
P32 is a 1-bit I/O port. In addition to the function as an I/O port pin, this pin also has a function to input an external
P34 is a 1-bit input-only port. This pin is also used as a RESET pin, and when the power is turned on, this is the
For the setting method for pin functions, see CHAPTER 15 OPTION BYTE.
When P34 is used as an input port pin, connect the pull-up resistor.
P32 and P34 can be set to the following operation modes in 1-bit units.
(1) Port mode
(2) Control mode
P40 to P47 constitute a 8-bit I/O port. Each bit of this port can be set to the input or output mode by using port
This pin inputs an active-low system reset signal.
These pins connect an oscillator to oscillate the X1 input clock.
X1 and X2 also function as the P23/ANI3 and P22/ANI2, respectively. For the setting method for pin functions, see
Supply an external clock to X1.
Caution P22/X2/ANI2 and P23/X1/ANI3 pins are pulled down during reset.
This is the positive power supply pin.
In the 78K0S/KY1+, V
This is the ground pin.
In the 78K0S/KY1+, V
to a stabilized GND (= 0 V).
DD
SS
P32 functions as a 1-bit I/O port. This pin can be set to the input or output mode by using port mode register 3
(PM3). In addition, an on-chip pull-up resistor can be connected to the port by using pull-up resistor option
register 3 (PU3).
P34 functions as a 1-bit input-only port.
P32 functions as an external interrupt request input pin (INTP1) for which the valid edge (rising edge, falling
edge, or both rising and falling edges) can be specified. .
DD
at the supply voltage used (2.7 to 5.5 V).
DD
SS
functions alternately as the ground potential of the A/D converter. Be sure to connect V
functions alternately as the A/D converter reference voltage input. When using the A/D
CHAPTER 2 PIN FUNCTIONS
User’s Manual U16994EJ3V0UD
When the power is turned on, this is the reset function,
SS