參數(shù)資料
型號： PIC16CR7X
廠商： Microchip Technology Inc.
英文描述： 28/40-Pin, 8-Bit CMOS ROM Microcontrollers
中文描述： 28/40-Pin，8位微控制器的CMOS光盤
文件頁數(shù)： 38/172頁
文件大小： 1506K
代理商： PIC16CR7X
PIC16CR7X
DS21993C-page 36
2007 Microchip Technology Inc.
4.4
PORTD and TRISD Registers
This section is not applicable to the PIC16CR73 or
PIC16CR76.
PORTD is an 8-bit port with Schmitt Trigger input buff-
ers. Each pin is individually configureable as an input or
output.
PORTD can be configured as an 8-bit wide micro-
processor port (Parallel Slave Port) by setting control
bit PSPMODE (TRISE<4>). In this mode, the input
buffers are TTL.
FIGURE 4-6:
PORTD BLOCK DIAGRAM
(IN I/O PORT MODE)
TABLE 4-7:
PORTD FUNCTIONS
TABLE 4-8:
SUMMARY OF REGISTERS ASSOCIATED WITH PORTD
Data Bus
WR Port
WR TRIS
RD Port
Data Latch
TRIS Latch
RD TRIS
Schmitt
Trigger
Input
Buffer
I/O pin
(1)
Note 1:
I/O pins have protection diodes to V
DD
and V
SS
.
Q
D
CK
Q
D
CK
EN
Q
D
EN
Name
Bit#
Buffer Type
Function
RD0/PSP0
bit 0
ST/TTL
(1)
ST/TTL
(1)
ST/TTL
(1)
ST/TTL
(1)
ST/TTL
(1)
ST/TTL
(1)
ST/TTL
(1)
ST/TTL
(1)
Input/output port pin or parallel slave port bit 0
RD1/PSP1
bit 1
Input/output port pin or parallel slave port bit 1
RD2/PSP2
bit 2
Input/output port pin or parallel slave port bit 2
RD3/PSP3
bit 3
Input/output port pin or parallel slave port bit 3
RD4/PSP4
bit 4
Input/output port pin or parallel slave port bit 4
RD5/PSP5
bit 5
Input/output port pin or parallel slave port bit 5
RD6/PSP6
bit 6
Input/output port pin or parallel slave port bit 6
RD7/PSP7
bit 7
Input/output port pin or parallel slave port bit
Legend:
Note 1:
ST = Schmitt Trigger input, TTL = TTL input
Input buffers are Schmitt Triggers when in I/O mode and TTL buffers when in Parallel Slave Port mode.
Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on
POR,
BOR
Value on
all other
Resets
08h
88h
89h
Legend:
PORTD
TRISD
TRISE
x
= unknown,
u
= unchanged, – = unimplemented read as ‘
0
’. Shaded cells are not used by PORTD.
RD7
PORTD Data Direction Register
IBF
OBF
RD6
RD5
RD4
RD3
RD2
RD1
RD0
xxxx xxxx
uuuu uuuu
1111 1111
1111 1111
IBOV
PSPMODE
—
PORTE Data Direction bits
0000 -111
0000 -111
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