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參數(shù)資料
| 型號： | LC723785 |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP100 |
| 封裝： | 14 X 20 MM, QIP-100 |
| 文件頁數(shù)： | 4/14頁 |
| 文件大小： | 474K |
| 代理商： | LC723785 |
LC723781N/723782N/723783N/723784/723785
No.8011-12/14
Continued from preceding page.
Pin name
Pin No.
I/O
Pin explanation
Equivalent circuit
RESET
86
I
System reset pin.
When the CPU is operating or in Halt mode, the system is reset when
this pin is held low for at least one machine cycle. Execution starts
with the PC pointing to location 0. At this time the SNS flip-flop is set.
A low level must be applied for at least 50ms when power is first
applied.
PH0/ADI0
PH1/ADI1
PH2/ADI2
PH3/ADI3
PI0/ADI4
PI1/ADI5
PI2/ADI6
PI3/ADI7
85
84
83
82
81
80
79
78
I
General-purpose input and A/D converter input shared function ports.
The IOS1 instruction is used to switch between the general-purpose
input and the A/D converter input functions.
When used as general-purpose input ports :
The general-purpose input port function is set up with the IOS1
instruction. (In bit units)
When used as A/D converter input pins :
The A/D converter input port function is set up with the IOS1
instruction. (In bit units)
The pin whose voltage is to be converted is specified with the IOS1
instruction, and the conversion is started with UCC instruction.
Note : Since input is disabled for ports specified for the ADI function,
executing an input instruction for such a port will always return
a low level.
Input is disabled in Backup mode.
These ports are set up as general-purpose input ports after a power
on reset.
PJ0
PJ1
PJ2
PJ3
76
75
74
73
O
General-purpose output ports (high-voltage output)
Since these are open-drain output circuits, external pull-up resistors
are required.
The internal transistors are turned off (resulting in a high-level output)
in Backup mode and after a power on reset.
PK0/INT0
PK1/INT1
PK2/INT2
PK3/INT3
72
71
70
69
I/O
General-purpose I/O and external interrupt shared function ports.
The input formats are Schmitt inputs.
The external interrupt function is enabled when the external interrupt
enable flag is set.
When used as general-purpose I/O ports :
The mode (input or output) is set in 1-bit units using the IOS1
instruction.
When used as external interrupt pins :
The external interrupt functions are enabled by setting the
corresponding external interrupt enable flag (INT0EN through
INT3EN). Here, the pins must be set to input mode in advance.
Input is disabled and the pins go to the high-impedance state in
Backup mode.
These ports are set up as general-purpose input ports after a power
on reset.
Continued on next page.
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