參數(shù)資料
型號: 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): 101/128頁
文件大?。?/td> 290K
代理商: MC68HC05G3
Page 64
MOTOROLA
Section 6: INPUT/OUTPUT PORTS
MC68HC05G3 (705G4) Specification Rev. 1.1
6.8.2
PORT H DATA DIRECTION REGISTER (DDRH)
READ:
anytime (when OPTM = 1)
WRITE:
anytime (when OPTM = 1)
RESET:
cleared to $00 (all general-purpose I/O configured for input)
DDRH
x
Port H Data Direction Register Bit
x
0 - configure I/O pin PH
x to input
1 - configure I/O pin PH
x to output
6.9
PORT J
Port J is a 4-bit general-purpose output port. Any read from port J will return the
output data latch. Since no input drive logic is associated with port J, there is no
DDRJ register.
6.9.1
PORT J DATA REGISTER (PORTJ)
READ:
anytime (returns output data latch; bit 4 through 7 are not used)
WRITE:
data stored in an internal latch
RESET:
cleared to $00; always output port
DDRH7
option
map
$0007
DDRH6 DDRH5 DDRH4 DDRH3 DDRH2 DDRH1 DDRH0
DDRH
B7
B6
B5
B4
B3
B2
B1
B0
00000000
RESET:
0
$003C
0
PJ3
PJ2
PJ1
PJ0
PORTJ
B7
B6
B5
B4
B3
B2
B1
B0
00000000
RESET:
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