參數(shù)資料
型號(hào)： 39504
廠商： Microchip Technology Inc.
英文描述： Section 4. Architecture
中文描述： 第4節(jié)。建筑
文件頁數(shù)： 7/16頁
文件大?。?/td> 232K
代理商： 39504
2000 Microchip Technology Inc.
DS39504A-page 4-7
Section 4 Architecture
A
4
4.4
I/O Descriptions
Table 4-1
gives a brief description of device pins and the functions that may be multiplexed to a
port pin. Multiple functions may exist on one port pin. When multiplexing occurs, the peripheral
module’s functional requirements may force an override of the data direction (TRIS bit) of the port
pin (such as in the A/D and Comparator modules).
I/O Descriptions
Table 4-1:
Pin Name
Pin
Type
Buffer
Type
Description
A19
A18
A17
A16
AD15
AD14
AD13
AD12
AD11
AD10
AD9
AD8
AD7
AD6
AD5
AD4
AD3
AD2
AD1
AD0
ALE
O
O
O
O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
O
—
—
—
—
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
—
System bus address line 19
System bus address line 18
System bus address line 17
System bus address line 16
System bus address/data line 15
System bus address/data line 14
System bus address/data line 13
System bus address/data line 12
System bus address/data line 11
System bus address/data line 10
System bus address/data line 9
System bus address/data line 8
System bus address/data line 7
System bus address/data line 6
System bus address/data line 5
System bus address/data line 4
System bus address/data line 3
System bus address/data line 2
System bus address/data line 1
System bus address/data line 0
System bus address latch enable strobe
Analog Input Channels
AN0
AN1
AN2
AN3
AN4
AN5
AN6
AN7
AN8
AN9
AN10
AN11
AN12
AN13
AN14
AN15
A
VDD
Legend: TTL = TTL-compatible input
ST = Schmitt Trigger input with CMOS levels
PU = Weak internal pull-up
Analog = Analog input or output
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
P
P
Analog Power
CMOS = CMOS compatible input or output
O = output
I = input
P = Power
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