參數(shù)資料
型號: UPD78F9222CS-CAC-A
廠商: Renesas Electronics America
文件頁數(shù): 45/125頁
文件大小: 0K
描述: MCU 8BIT 4KB FLASH 20PIN
標準包裝: 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
程序存儲器容量: 4KB(4K x 8)
程序存儲器類型: 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-DIP(0.300",7.62mm)
包裝: 托盤
CHAPTER 2 PIN FUNCTIONS
User’s Manual U16898EJ6V0UD
24
2.2.3 P40 to P45 (Port 4)
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
timer signal, input external interrupt request signals, and input/output the data of the serial interface.
These pins can be set to the following operation modes in 1-bit units.
(1)
Port mode
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).
(2)
Control mode
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
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.
(b) TOH1
This is the output pin of 8-bit timer H1.
(c) TxD6
This pin outputs serial data from the asynchronous serial interface.
(d) RxD6
This pin inputs serial data to the asynchronous serial interface.
2.2.4 P121 to P123 (Port 12)
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-
up resistor can be connected to P123 by using pull-up resistor option register 12 (PU12).
P121 and P122 also function as the X1 and X2, respectively.
For the setting method for pin functions, see
CHAPTER 17 OPTION BYTE.
Caution
The P121/X1 and P122/X2 pins are pulled down during reset.
2.2.5 P130 (Port 13)
This is a 1-bit output-only port.
2.2.6 RESET
This pin inputs an active-low system reset signal.
When the power is turned on, this is the reset function,
regardless of the option byte setting.
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