參數(shù)資料
型號(hào)： HD404654H
廠商： Hitachi,Ltd.
英文描述： 4-Bit Single-Chip Microcomputer
中文描述： 4位單片機(jī)
文件頁(yè)數(shù)： 35/109頁(yè)
文件大?。?/td> 430K
代理商： HD404654H
HD404654 Series
35
Input/Output
The MCU has 27 input/output pins (D
0
–D
9
, R0
0
–R4
3
) and 5 input pins (D
12
, D
13,
RD
0
, RD
1
, RE
0
). The
features are described below.
A maximum current of 15 mA is allowed for each of the pins D
4
to D
9
with a total maximum current of
less than 105 mA. In addition, D
0
–D
3
can each act as a 10-mA maximum current source.
Some input/output pins are multiplexed with peripheral function pins such as for the timers or serial
interface. For these pins, the peripheral function setting is done prior to the D or R port setting.
Therefore, when a peripheral function is selected for a pin, the pin function and input/output selection
are automatically switched according to the setting.
Input or output selection for input/output pins and port or peripheral function selection for multiplexed
pins are set by software.
Peripheral function output pins are CMOS output pins. Only the R4
3
/SO
1
pin can be set to NMOS open-
drain output by software.
In stop mode, the MCU is reset, and therefore peripheral function selection is cancelled. Input/output
pins are in high-impedance state.
Pins D
0
–D
3
have built-in pull-down MOSs, and other input/output pins have built-in pull-up MOSs,
which can be individually turned on or off by software.
The I/O buffer configuration is shown in figure 21 and 22, programmable I/O circuits are listed in table 19,
and I/O pin circuit types are shown in table 20.
Table 19 Programmable I/O Circuits
MIS3 (Bit 3 of MIS)
0
1
DCD, DCR
0
1
0
1
PDR
0
1
0
1
0
1
0
1
CMOS buffer
PMOS —
—
—
On
—
—
—
On
NMOS —
—
On
—
—
—
On
—
Pull-up MOS
—
—
—
—
—
On
—
On
Pull-down MOS
Note:
— indicates off status.
—
—
—
—
On
—
On
—
相關(guān)PDF資料
PDF描述
HD404654S 4-Bit Single-Chip Microcomputer
HD4074654 4-Bit Single-Chip Microcomputer
HD4074654H 4-Bit Single-Chip Microcomputer
HD4074654S 4-Bit Single-Chip Microcomputer
HD4046612 Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit(帶雙音多頻電路的低電壓微計(jì)算機(jī))
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HD404654S 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:4-Bit Single-Chip Microcomputer
HD404654SERIES 制造商:未知廠家 制造商全稱:未知廠家 功能描述:
HD4046612 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit
HD4046612H 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit
HD404668 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit
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