參數(shù)資料
型號: MC68HC11K4CFN2
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: Technical Summary 8-Bit Microcontroller
中文描述: 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PQCC84
封裝: PLASTIC, LCC-84
文件頁數(shù): 47/80頁
文件大?。?/td> 420K
代理商: MC68HC11K4CFN2
M68HC11 K Series
MC68HC11KTS/D
MOTOROLA
47
NOTE
In expanded and special test modes, chip-select circuitry forces the I/O state to be
an output for each port H pin associated with an enabled chip select. In any mode,
PWM circuitry forces the I/O state to be an output for each port H line associated
with an enabled pulse width modulator channel. In these cases, data direction bits
are not changed and have no effect on these lines. DDRH reverts to controlling the
I/O state of a pin when the associated function is disabled. Refer to
4.3 Memory
Expansion and Chip Selects
and
12 Pulse-Width Modulation Timer
for further
information.
Port G pins reset to high-impedance inputs with selectable internal pull-up resistors. In expanded and
special test modes PG7 becomes R/W. Refer to PGAR register description.
DDG[7:0] —Data Direction for Port G
0 = Configure corresponding I/O pin for input only
1 = Configure corresponding I/O pin for output
In expanded and test modes, bit 7 is configured for R/W, forcing the state of this pin to be an output
although the DDRG value remains zero. Refer to PGAR register description.
Bits [7:6] —Not implemented
Always read zero
PGAR[5:0] —Port G Pin Assignment Bits [5:0]
0 = Corresponding port G pin is general-purpose I/O
1 = Corresponding port G pin is memory expansion address line (XA[18:13])
NOTE
Each PGAR bit forces the I/O state to be an output for each port G pin associated
with an enabled expansion address line. In this case, data direction bits are not
changed and have no effect on these lines. DDRG reverts to controlling the I/O
state of a pin when the associated function is disabled. Refer to
4.1 Memory Ex-
pansion
for further information.
PORTG
—Port G Data
$007E
Bit 7
6
5
4
3
2
1
Bit 0
PG7
PG6
PG5
PG4
PG3
PG2
PG1
PG0
RESET:
I
I
I
I
I
I
I
I
Alt. Pin
Func.:
R/W
XA18
XA17
XA16
XA15
XA14
XA13
DDRG
—Data Direction Register for Port G
$007F
Bit 7
6
5
4
3
2
1
Bit 0
DDG7
DDG6
DDG5
DDG4
DDG3
DDG2
DDG1
DDG0
RESET:
0
0
0
0
0
0
0
0
PGAR
Port G Assignment
$002D
Bit 7
6
5
4
3
2
1
Bit 0
$
0
02D
PGAR5
PGAR4
PGAR3
PGAR2
PGAR1
PGAR0
RESET:
0
0
0
0
0
0
0
0
相關(guān)PDF資料
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