UPD78F9222MC(T)-5A4-A NEC, UPD78F9222MC(T)-5A4-A Datasheet - Page 25

• Manufacturer Part Number: UPD78F9222MC(T)-5A4-A
• Description: 8BIT MCU, 4K FLASH, 256B RAM, 78F9222
• Manufacturer: NEC

Specifications of UPD78F9222MC(T)-5A4-A

• Controller Family/series: UPD78
• No. Of I/o's: 17
• Ram Memory Size: 256Byte
• Cpu Speed: 10MHz
• No. Of Timers: 4
• No. Of: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 4KB
• Oscillator Type: External, Internal

2.2.3 P40 to P45 (Port 4)
timer signal, input external interrupt request signals, and input/output the data of the serial interface.
2.2.4 P121 to P123 (Port 12)
up resistor can be connected to P123 by using pull-up resistor option register 12 (PU12).
CHAPTER 17 OPTION BYTE.
2.2.5 P130 (Port 13)
2.2.6 RESET
regardless of the option byte setting.
P40 to P45 constitute a 6-bit I/O port, port 4. In addition to I/O port pins, these pins also have functions to output a
These pins can be set to the following operation modes in 1-bit units.
(1) Port mode
(2) Control mode
P121 to P123 constitute a 3-bit I/O port, port 12.
Each bit of this port can be set to the input or output mode by using port mode register 12 (PM12). An on-chip pull-
P121 and P122 also function as the X1 and X2, respectively. For the setting method for pin functions, see
Caution The P121/X1 and P122/X2 pins are pulled down during reset.
This is a 1-bit output-only port.
This pin inputs an active-low system reset signal.
P40 to P45 function as a 6-bit I/O port. Each bit of this port can be set to the input or output mode by using
port 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).
P40 to 45 function to output a signal from an internal timer, input external interrupt request signals, and
input/output data of the serial interface.
(a) INTP1 and INTP3
(b) TOH1
(c) TxD6
(d) RxD6
These are external interrupt request input pins for which the valid edge (rising edge, falling edge, or both
rising and falling edges) can be specified.
This is the output pin of 8-bit timer H1.
This pin outputs serial data from the asynchronous serial interface.
This pin inputs serial data to the asynchronous serial interface.
CHAPTER 2 PIN FUNCTIONS
User’s Manual U16898EJ5V0UD
When the power is turned on, this is the reset function,
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