SST65P542R-8-C-SG 查看數據表（PDF） - Silicon Storage Technology
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SST65P542R-8-C-SG Datasheet PDF : 41 Pages
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Remote Controller MCU
SST65P542R
Data Sheet
PORT A Data Register (PORTA)
Location
7
6
5
4
3
2
1
0
Reset Value
0000H
PA7
PA6
PA5
PA4
PA3
PA2
PA1
PA0
00H
Symbol
PA[7:0]
Function
Port A data register bit 0 to 7. These bits are for both reading and writing. Write the data to this
register will output data to port A pins when it’s in output mode. If the pins are set to input mode,
only the output data register is updated, port A pins are tri-stated. Reading the data from this
register will read the state of port A pins when set in input mode. If the pins are set to output
mode, it reads the output data register. See Table 3-2 for details. For a detailed explanation of
each parallel I/O port, please refer to Section 4.0, “Parallel Input/Output Ports” on page 20.
PORT B Data Register (PORTB)
Location
7
6
5
4
3
2
1
0
Reset Value
0001H
PB7
PB6
PB5
PB4
PB3
PB2
PB1
PB0
00H
Symbol
PB[7:0]
Function
Port B data register bit 0 to 7. These bits are for both reading and writing. Writing data to this
register will output data to port B pins when it’s in output mode. If the pins are set to input mode,
only the output data register is updated, port B pins are tri-stated. Reading the data from this
register will read the state of port B pins when set in input mode. If the pins are set to output
mode, it reads the output data register. See Table 3-2 for details.
PORT C Data Register (PORTC)
Location
7
6
5
0003H
-
-
-
4
3
2
1
0
Reset Value
-
DDRC3 DDRC2 DDRC1 DDRC0
00H
Symbol
PC[3:0]
Function
Port C data register bit 0 to 3. These bits are for both reading and writing. Writing data to this
register will output data to port C pins when it’s in output mode. If the pins are set to input mode,
only output data register is updated, port C pins are tri-stated. Reading data from this register will
read the state of port C pins when set in input mode. If the pins are set to output mode, it reads
the output data register. See Table 3-2 for details.
TABLE 3-2: I/O PIN FUNCTIONS AS GENERAL PURPOSE I/O
Access
Write
Write
DDRA, DDRB, DDRC
0
1
Read
0
Read
1
Mode
Input
Output
Input
Output
I/O Pin Functions
Data is written into the output data register.
Data is written into the output data register and
output to the I/O pins.
The state of I/O is read
The output data register is read
T3-2.0 1170
©2005 Silicon Storage Technology, Inc.
10
S71170-06-000
7/05
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