參數(shù)資料
型號(hào): UPD78F9222MC-5A4-A
廠商: Renesas Electronics America
文件頁數(shù): 46/125頁
文件大?。?/td> 0K
描述: MCU 8BIT 4KB FLASH 20PIN
標(biāo)準(zhǔn)包裝: 400
系列: 78K0S/Kx1+
核心處理器: 78K0S
芯體尺寸: 8-位
速度: 10MHz
連通性: LIN,UART/USART
外圍設(shè)備: LVD,POR,PWM,WDT
輸入/輸出數(shù): 15
程序存儲(chǔ)器容量: 4KB(4K x 8)
程序存儲(chǔ)器類型: 閃存
RAM 容量: 256 x 8
電壓 - 電源 (Vcc/Vdd): 2 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 4x10b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 20-LSSOP(0.240",6.10mm 寬)
包裝: 托盤
CHAPTER 2 PIN FUNCTIONS
User’s Manual U16898EJ6V0UD
25
2.2.7 X1 and X2
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
CHAPTER 17 OPTION BYTE.
Supply an external clock to X1.
Caution
The P121/X1 and P122/X2 pins are pulled down during reset.
2.2.8 AVREF
This is the A/D converter reference voltage input pin and the positive power supply pin of P20 to P23 and A/D
converter. When the A/D converter is not used, connect this pin to VDD.
2.2.9 VDD
This is the positive power supply pin.
2.2.10 VSS
This is the ground pin.
In the 78K0S/KA1+, VSS functions alternately as the ground potential of the A/D converter. Be sure to connect VSS
to a stabilized GND (= 0 V).
2.3 Pin I/O Circuits and Connection of Unused Pins
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.
Table 2-1. Types of Pin I/O Circuits and Connection of Unused Pins
Pin Name
I/O Circuit Type
I/O
Recommended Connection of Unused Pin
P20/ANI0 to P23/ANI3
11
Input:
Independently connect to AVREF or VSS via a resistor.
Output: Leave open.
P30/TI000/INTP0
P31/TI010/TO00/INTP2
8-A
I/O
Input:
Independently connect to VDD or VSS via a resistor.
Output: Leave open.
P34/RESET
2
Input
Connect to VDD via a resistor.
P40
P41/INTP3
P42/TOH1
P43/TxD6/INTP1
P44/RxD6
P45
8-A
Input:
Independently connect to VDD or VSS via a resistor.
Output: Leave open.
P121/X1
P122/X2
16-B
Input:
Independently connect to VSS via a resistor.
Output: Leave open.
P123
8-A
I/O
Input:
Independently connect to VDD or VSS via a resistor.
Output: Leave open.
P130
3-C
Output
Leave open.
AVREF
Input
Directly connect to VDD.
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