參數(shù)資料
型號(hào): PIC16LF84A
廠商: Microchip Technology Inc.
英文描述: 18-pin Enhanced Flash/EEPROM 8-Bit Microcontroller
中文描述: 18引腳增強(qiáng)型閃存/ EEPROM的8位微控制器
文件頁數(shù): 14/68頁
文件大?。?/td> 494K
代理商: PIC16LF84A
PIC16F84A
DS35007A-page 14
Preliminary
1998 Microchip Technology Inc.
FIGURE 3-2:
BLOCK DIAGRAM OF PIN RA4
TABLE 3-1
PORTA FUNCTIONS
TABLE 3-2
SUMMARY OF REGISTERS ASSOCIATED WITH PORTA
Data
bus
WR
PORT
WR
TRIS
RD PORT
Data Latch
TRIS Latch
RD TRIS
Schmitt
Trigger
input
buffer
N
V
SS
RA4 pin
TMR0 clock input
Note: I/O pin has protection diodes to V
SS
only.
Q
D
Q
CK
Q
D
Q
CK
EN
Q
D
Name
Bit0
bit0
bit1
bit2
bit3
bit4
Buffer Type
TTL
TTL
TTL
TTL
ST
Function
RA0
RA1
RA2
RA3
RA4/T0CKI
Input/output
Input/output
Input/output
Input/output
Input/output or external clock input for TMR0.
Output is open drain type.
Legend: TTL = TTL input, ST = Schmitt Trigger input
Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on
Power-on
Reset
Value on all
other resets
05h
85h
PORTA
TRISA
RA4/T0CKI
TRISA4
RA3
TRISA3
RA2
TRISA2
RA1
TRISA1
RA0
TRISA0
---x xxxx
---u uuuu
---1 1111
---1 1111
Legend:
x
= unknown,
u
= unchanged,
-
= unimplemented read as '0'. Shaded cells are unimplemented, read as '0'
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