UPD78F9222MC(T)-5A4-A NEC, UPD78F9222MC(T)-5A4-A Datasheet - Page 26

• 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

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2.2.7 X1 and X2
CHAPTER 17 OPTION BYTE.
2.2.8 AV
converter. When the A/D converter is not used, connect this pin to V
2.2.9 V
2.2.10 V
to a stabilized GND (= 0 V).
2.3 Pin I/O Circuits and Connection of Unused Pins
26
P20/ANI0 to P23/ANI3
P30/TI000/INTP0
P31/TI010/TO00/INTP2
P34/RESET
P40
P41/INTP3
P42/TOH1
P43/TxD6/INTP1
P44/RxD6
P45
P121/X1
P122/X2
P123
P130
AV
These pins connect an oscillator to oscillate the X1 input clock.
X1 and X2 also function as the P121 and P122, respectively. For the setting method for pin functions, see
Supply an external clock to X1.
This is the A/D converter reference voltage input pin and the positive power supply pin of P20 to P23 and A/D
This is the positive power supply pin.
This is the ground pin.
In the 78K0S/KA1+, V
Table 2-1 shows I/O circuit type of each pin and the connections of unused pins.
For the configuration of the I/O circuit of each type, refer to Figure 2-1.
Caution The P121/X1 and P122/X2 pins are pulled down during reset.
REF
DD
SS
Pin Name
REF
Table 2-1. Types of Pin I/O Circuits and Connection of Unused Pins
SS
functions alternately as the ground potential of the A/D converter. Be sure to connect V
11
8-A
2
8-A
16-B
8-A
3-C
I/O Circuit Type
−
CHAPTER 2 PIN FUNCTIONS
I/O
Input
I/O
Output
Input
User’s Manual U16898EJ5V0UD
I/O
Input:
Output: Leave open.
Input:
Output: Leave open.
Connect to V
Input:
Output: Leave open.
Input:
Output: Leave open.
Input:
Output: Leave open.
Leave open.
Directly connect to V
Independently connect to AV
Independently connect to V
Independently connect to V
Independently connect to V
Independently connect to V
DD
Recommended Connection of Unused Pin
DD
.
via a resistor.
DD
.
DD
DD
SS
DD
REF
or V
or V
via a resistor.
or V
or V
SS
SS
SS
SS
via a resistor.
via a resistor.
via a resistor.
via a resistor.
SS