- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄300064 > UPD68AMC-XXX-5A4 4-BIT, OTPROM, 4.5 MHz, MICROCONTROLLER, PDSO20 PDF資料下載
參數(shù)資料
| 型號： | UPD68AMC-XXX-5A4 |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT, OTPROM, 4.5 MHz, MICROCONTROLLER, PDSO20 |
| 封裝： | 0.300 INCH, PLASTIC, SSOP-20 |
| 文件頁數(shù)： | 9/73頁 |
| 文件大?。?/td> | 561K |
| 代理商： | UPD68AMC-XXX-5A4 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁當前第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁
15
PD67, 67A, 68, 68A, 69
Data Sheet U14935EJ2V1DS
3.1 KI/O Port (P0)
The KI/O port is an 8-bit I/O port for key scan output.
I/O mode is set by bit 1 of the P4 register.
If a read instruction is executed, the pin state can be read in input mode, whereas the output latch contents can
be read in output mode.
If a write instruction is executed, data can be written to the output latch regardless of input or output mode.
After reset, the port is placed in output mode and the value of the output latch (P0) becomes 1111 1111B.
The KI/O port incorporates a pull-down resistor, allowing pull-down in input mode only.
Caution When a key is double-pressed, a high-level output and a low-level output may conflict at the
KI/O port. To avoid this, the low-level output current of the KI/O port is held low. Therefore, be
careful when using the KI/O port for purposes other than key scan output.
The KI/O port is designed so that even when connected directly to VDD within the normal supply
voltage range (VDD = 2.0 to 3.6 V), no problem occurs.
Table 3-2. KI/O Port (P0)
Bit
b7
b6
b5
b4
b3
b2
b1
b0
Name
KI/O7
KI/O6
KI/O5
KI/O4
KI/O3
KI/O2
KI/O1
KI/O0
b0 to b7: When reading:
In input mode, the KI/O pin’s state is read.
In output mode, the KI/O pin’s output latch contents are read.
When writing:
Data is written to the KI/O pin’s output latch regardless of input or output mode.
3.2 KI Port/Special Ports (P1)
3.2.1 KI port (P11: bits 4 to 7 of P1)
The KI port is a 4-bit input port for key input. The pin state can be read.
The use of a pull-down resistor for the KI port can be specified in 4-bit units by software using bit 5 of the P4
register. After reset, a pull-down resistor is connected.
Table 3-3. KI/Special Port Register (P1)
Bit
b7
b6
b5
b4
b3
b2
b1
b0
Name
KI3
KI2
KI1
KI0
S1/LED
S0
S2
Fixed to “1”
b1:
The state of the S2 pin is read (read only).
b2:
In input mode, state of the S0 pin is read (read only).
In OFF mode, this bit is fixed to 1.
b3:
The state of the S1/LED pin is read regardless of input/output mode (read only).
b4 to b7: The state of the KI pin is read (read only).
Caution In order to prevent malfunction, be sure to input a low level to one or more of pins KI0 to KI3
when POC is released by supply voltage rising (Can be left open. When open, leave the pull-
down resistor connected).
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| UPD703032AYGF-XXX-3BA | 32-BIT, MROM, 20 MHz, MICROCONTROLLER, PQFP100 |
| UPD70F3079YGF-3BA | 32-BIT, FLASH, 16 MHz, RISC MICROCONTROLLER, PQFP100 |
| UPD750004GBA-XXX-3BS-MTX | 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PQFP44 |
| UPD754244GS-XXX-GJG | 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PDSO20 |
| UPD75P3018AGK-9EU | Circular Connector; No. of Contacts:56; Series:MS27467; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:25; Circular Contact Gender:Pin; Circular Shell Style:Straight Plug; Insert Arrangement:25-4 RoHS Compliant: No |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UPD68MC-XXX-5A4 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:MICROCONTROLLER|4-BIT|CMOS|SSOP|20PIN|PLASTIC |
| UPD69 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Microcontrollers for Remote Controllers Pamphlet | Pamphlet[11/2002] |
| UPD6900C | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Digital-to-Analog Converter |
| UPD6900G | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Digital-to-Analog Converter |
| UPD6901C | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Video DAC without Color Palette |
發(fā)布緊急采購，3分鐘左右您將得到回復。