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| 型號(hào)： | μPD78064B(A) |
| 廠商： | NEC Corp. |
| 元件分類： | 8位微控制器 |
| 英文描述： | 8 Bit Single Chip Microcontrollers |
| 中文描述： | 8位單片機(jī)微控制器 |
| 文件頁(yè)數(shù)： | 14/66頁(yè) |
| 文件大?。?/td> | 395K |
| 代理商： | ΜPD78064B(A) |
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14
μ
PD78064B(A)
3.2
Non-port Pins (2/2)
Pin Name
I/O
Function
After Reset
Alternate
function
ANI0 to ANI7
Input
A/D converter analog input.
Input
P10 to P17
AV
REF
Input
A/D converter reference voltage input.
—
—
AV
DD
—
A/D converter analog power supply (shared with the port power supply).
—
—
AV
SS
—
A/D converter ground potential (shared with the port ground potential).
—
—
RESET
Input
System reset input.
—
—
X1
Input
Main system clock oscillation crystal connection.
—
—
X2
—
—
—
XT1
Input
Subsystem clock oscillation crystal connection.
Input
P07
XT2
—
—
—
V
DD
—
Positive power supply (except for port).
—
—
V
SS
—
Ground potential (except for port).
—
—
IC
—
Internal connection. Connect directly to V
SS
pin.
—
—
Cautions 1. The AV
DD
pin functions as both an A/D converter power supply and a port power supply. When
the
μ
PD78064B(A) is used in applications where the noise generated inside the microcontroller
needs to be reduced, connect the AV
DD
pin to another power supply which has the same potential
as V
DD
.
2. The AV
SS
pin functions as both an A/D converter ground and a port ground. When the
μ
PD78064B(A) is used in applications where the noise generated inside the microcontroller
needs to be reduced, connect the AV
SS
pin to another ground line than V
SS
.
3.3
Pin I/O Circuits and Recommended Connection of Unused Pins
The input/output circuit type of each pin and recommended connection of unused pins are shown in Table 3-1.
For the input/output circuit configuration of each type, see Figure 3-1.
Table 3-1. Input/Output Circuit Type of Each Pin (1/2)
Pin Name
Input/output
Circuit Type
I/O
Recommended Connection when not Used
P00/INTP0/TI00
2
Input
Connected to V
SS
.
P01/INTP1/TI01
8-D
Input/output
Independently connected to V
SS
through a resistor.
P02/INTP2
P03/INTP3
P04/INTP4
P05/INTP5
P07/XT1
16
Input
Connected to V
DD
.
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