參數(shù)資料
型號: PIC14000
廠商: Microchip Technology Inc.
英文描述: CTV 22C 22#22D SKT RECP
中文描述: 28引腳可編程混合信號控制器
文件頁數(shù): 33/152頁
文件大?。?/td> 953K
代理商: PIC14000
1996 Microchip Technology Inc.
Preliminary
DS40122B-page 33
PIC14000
FIGURE 5-10: BLOCK DIAGRAM OF PORTD<1:0> PINS
FIGURE 5-11: PORTD DATA REGISTER
Legend: U = unimplemented, read as ‘0’, x = unknown.
08h
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
PORTD
RD7/AN7 RD6/AN6 RD5/AN5 RD4/AN4
RD3/REFB
RD2/CMPB RD1/SDAB RD0/SCLB
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
POR value xxh
X
X
X
X
X
X
X
X
Bit
Name
Function
B7
RD7/AN7
GPIO or analog input. Returns value on pin RD7/AN7 when used as a digital
input. When configured as an analog input, reads as ‘0’.
B6
RD6/AN6
GPIO or analog input. Returns value on pin RD6/AN6 when used as a digital
input. When configured as an analog input, reads as ‘0’.
B5
RD5/AN5
GPIO or analog input. This pin can connect to a level shift network. If
enabled, a +0.5V offset is added to the input voltage. When configured as
an analog input, reads as ‘0’.
B4
RD4/AN4
GPIO or analog input. Returns value on pin RD4/AN4 when used as a digital
input. When configured as an analog input, reads as ‘0’.
B3
RD3/REFB
This pin can serve as a GPIO, or programmable reference B output.
B2
RD2/CMPB
This pin can serve as a GPIO, or comparator B output.
B1
RD1/SDAB
Alternate synchronous serial data I/O for I
the I
CSEL bit in the MISC register. This pin can also serve as a general
purpose I/O. This pin has an N-channel pull-up to VDD which is disabled in
I
C mode.
2
C interface enabled by setting
2
2
B0
RD0/SCLB
Alternate synchronous serial clock for I
I
CSEL bit in the MISC register. This pin can also serve as a general pur-
pose I/O. This pin has an N-Channel pull-up to VDD which is disabled in I
mode.
2
C interface, enabled by setting the
2
2
C
D
Q
CK Q
D
Q
CK Q
D
Q
EN
Data
Bus
Write
PORTD
Write
TRISD
Read
TRISD
Read
PortD
Note: I/O pins have protection diodes to V
DD
and V
SS
. These pins do not have a P-channel pull-up.
N
N
I/O
Pin
V
SS
V
DD
Schmitt Trigger
Input Buffer
I
2
CCON<5>
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