參數(shù)資料
型號(hào): MC68HC05G3
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, OTPROM, 2 MHz, MICROCONTROLLER, PQFP80
封裝: QFP-80
文件頁數(shù): 93/128頁
文件大?。?/td> 290K
代理商: MC68HC05G3
Page 57
Section 6: INPUT/OUTPUT PORTS
MOTOROLA
MC68HC05G3 (705G4) Specification Rev. 1.1
6.3.1
PORT C DATA REGISTER (PORTC)
READ:
anytime
(returns pin level if DDR set to input; returns output data latch if DDR set to
output)
WRITE:
anytime
(data stored in an internal latch; drives pin only if DDR set for output
writes; do not change pin state when pin configured for peripheral output for
SDO1, SCK1, and EVO.)
RESET:
becomes high impedance inputs
6.3.2
PORT C DATA DIRECTION REGISTER (DDRC)
READ:
anytime (when OPTM = 1)
WRITE:
anytime (when OPTM = 1)
RESET:
cleared to $00 (all general-purpose I/O configured for input)
DDRC
x
Port C Data Direction Register Bit
x
0 - configure I/O pin PC
x to input
1 - configure I/O pin PC
x to output
The timer and SPI1 force the I/O state to be an output for each port C line
associated with an enabled output function such as SDO1 and EVO. In this case,
the data direction bits will not change. If bit 7 or bit 6 is enabled, the
corresponding port bit always becomes an open drain output.
PC7
$0002
PC6
PC5
PC4
PC3
PC2
PC1
PC0
PORTC
B7
B6
B5
B4
B3
B2
B1
B0
UUUUUUUU
RESET:
DDRC7
option
map
$0002
DDRC6 DDRC5 DDRC4 DDRC3 DDRC2 DDRC1 DDRC0
DDRC
B7
B6
B5
B4
B3
B2
B1
B0
00000000
RESET:
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