參數(shù)資料
型號: MC68HC05JB3JDW
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 3 MHz, MICROCONTROLLER, PDSO28
封裝: SOIC-28
文件頁數(shù): 97/148頁
文件大?。?/td> 1600K
代理商: MC68HC05JB3JDW
GENERAL RELEASE SPECIFICATION
November 5, 1998
MOTOROLA
INPUT/OUTPUT PORTS
MC68HC05JB3
7-6
REV 1
DDRCx — PCx Data Direction
1 =
Port pin set as output.
0 =
Port pin set as input.
VROFF — USB 3.3V Voltage Reference
See USB section for details.
1 =
Disable 3.3V regulator.
0 =
Enables 3.3V regulator.
OCMPO — OCMP Output Enable
See 16-BIT TIMER section for details.
1 =
PC0 is OCMP pin, OCF from 16-bit timer output compare.
0 =
PC0 is standard I/O pin, from Port-C data register.
7.3.3 Port-C Pull-down/up Register
With the pull-up/down mask option selected, each pin in Port-C has an internal
pull-down resistor which can be enabled by writing a ‘0’ to the corresponding bit in
the Port-C pull-down/up control register (PDURC) at location $000F.
PDRCx — PCx Pin Pull-down Enable
1 =
Internal pull-down disabled.
0 =
Internal pull-down enabled.
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
PDURC
R
$000F
W
PDRC3
PDRC2
PDRC1
PDRC0
reset:
00000000
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