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參數(shù)資料
| 型號： | MC68HC05RC17DW |
| 廠商： | MOTOROLA INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 2.097 MHz, MICROCONTROLLER, PDSO28 |
| 封裝： | SOIC-28 |
| 文件頁數(shù)： | 46/128頁 |
| 文件大小： | 561K |
| 代理商： | MC68HC05RC17DW |
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NON-DISCLOSURE
AGREEMENT
REQUIRED
General Description
General Release Specification
MC68HC05RC17 — Rev. 2.0
24
General Description
MOTOROLA
1.5.6 IRO
The IRO pin is the high-current source and sink output of the carrier
modulator transmitter subsystem which is suitable for driving infrared
(IR) LED biasing logic. See Section 9. Carrier Modulator Transmitter
1.5.7 Port A (PA0–PA7)
These eight I/O lines comprise port A. The state of any pin is software
programmable and all port A lines are configured as inputs during
power-on or reset. For detailed information on I/O programming, see
1.5.8 Port B (PB0–PB7)
These eight I/O lines comprise port B. The state of any pin is software
programmable and all port B lines are configured as inputs during
power-on or reset. Each port B I/O line has a mask optionable pullup for
keyscan. For detailed information on I/O programming, see Section 7.
1.5.9 Port C (PC0–PC1 and PC4–PC7)
These six I/O lines comprise port C. PC0 is a high-current pin. PC4
through PC7 are available only in higher pin count (>28) packages. The
state of any pin is software programmable and all port C lines are
configured as input during power-on or reset. For detailed information on
I/O programming, see Section 7. Parallel Input/Output (I/O).
NOTE:
Only two bits of port C are bonded out in 28-pin packages for the
MC68HC05RC17, although port C is truly a 6-bit port. Since pins
PC4–PC7 are unbonded, software should include the code to set their
respective data direction register locations to outputs to avoid floating
inputs.
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