UPD78F9222MC(T)-5A4-A NEC, UPD78F9222MC(T)-5A4-A Datasheet - Page 51

• 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

4.2
P20 to P23
P30
P31
P34
P40
P41
P42
P43
P44
P45
P121
P122
P123
P130
Control registers
Ports
Pull-up resistor
Pin Name
Caution The P121/X1 and P122/X2 pins are pulled down during reset.
Remarks 1. P121 and P122 can be allocated when the high-speed internal oscillation is selected as the system
Ports consist of the following hardware units.
Note For the setting method for pin functions, see CHAPTER 17 OPTION BYTE.
Note
Note
Note
Port Configuration
Item
2. P122 can be allocated when an external clock is selected as the system clock.
I/O
I/O
Input
I/O
I/O
Output
I/O
clock.
Port 2.
4-bit I/O port.
Can be set to input or output mode in 1-bit units.
On-chip pull-up resistor can be connected by setting software.
Port 3
Port 4.
6-bit I/O port.
Can be set to input or output mode in 1-bit units.
On-chip pull-up resistor can be connected setting software.
Port 12.
3-bit I/O port.
Can be set to input or output mode in 1-bit units.
On-chip pull-up resistor can be connected only to P123 by
setting software.
Port 13.
1-bit output-only port.
Port mode registers (PM2, PM3, PM4, PM12)
Port registers (P2, P3, P4, P12, P13)
Port mode control register 2 (PMC2)
Pull-up resistor option registers (PU2, PU3, PU4, PU12)
Total: 17 (CMOS I/O: 15, CMOS input: 1, CMOS output: 1)
Total: 13
Table 4-2. Configuration of Ports
CHAPTER 4 PORT FUNCTIONS
Table 4-1. Port Functions
User’s Manual U16898EJ5V0UD
Can be set to input or output mode in 1-
bit units.
On-chip pull-up resistor can be
connected by setting software.
Input only
Function
Configuration
Input
Input
Input
Input
Input
Output
After Reset
ANI0 to ANI3
TI000/INTP0
TI010/TO00/
INTP2
RESET
INTP3
TOH1
TxD6/INTP1
RxD6
X1
X2
Function Pin
Note
Note
Alternate-
Note
−
−
−
−
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