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參數(shù)資料
| 型號(hào)： | MC68HLC705KJ1CP |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, OTPROM, 4 MHz, MICROCONTROLLER, PDIP16 |
| 封裝： | PLASTIC, DIP-16 |
| 文件頁(yè)數(shù)： | 69/108頁(yè) |
| 文件大?。?/td> | 719K |
| 代理商： | MC68HLC705KJ1CP |
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MC68HC705KJ1 MC68HRC705KJ1 MC68HLC705KJ1 Data Sheet, Rev. 4.1
Freescale Semiconductor
63
Chapter 7
Parallel I/O Ports (PORTS)
7.1 Introduction
Ten bidirectional pins form one 8-bit input/output (I/O) port and one 2-bit I/O port. All the bidirectional port
pins are programmable as inputs or outputs.
NOTE
Connect any unused I/O pins to an appropriate logic level, either VDD or
VSS. Although the I/O ports do not require termination for proper operation,
termination reduces excess current consumption and the possibility of
electrostatic damage.
Addr.
Register Name:
Bit 7
654321
Bit 0
$0000
Port A Data Register (POR-
TA)
Read:
PA7
PA6
PA5
PA4
PA3
PA2
PA1
PA0
Write:
Reset:
Unaffected by reset
$0001
Port B Data Register
(PORTB)
Read:
0
See Note
PB3
PB2
See Note
Write:
Reset:
Unaffected by reset
$0004
Data Direction Register A
(DDRA)
Read:
DDRA7
DDRA6
DDRA5
DDRA4
DDRA3
DDRA2
DDRA1
DDRA0
Write:
Reset:
00000000
$0005
Data Direction Register B
(DDRB)
Read:
0
See Note
DDRB3
DDRB2
See Note
Write:
Reset:
00000000
$0010
Port A Pulldown Register
(PDRA)
Read:
Write:
PDIA7
PDIA6
PDIA5
PDIA4
PDIA3
PDIA2
PDIA1
PDIA0
Reset:
00000000
$0011
Port B Pulldown Register
(PDRB)
Read:
Write:
See Note
PDIB3
PDIB2
See Note
Reset:
000000
= Unimplemented
Note:
PB5, PB4, PB1, and PB0 should be configured as inputs at all times. These bits are available for read/write but are not
available externally. Configuring them as inputs will ensure that the pulldown devices are enabled, thus properly termi-
nating them.
Figure 7-1. Parallel I/O Port Register Summary
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MC68HRC705KJ1CP | 8-BIT, OTPROM, 4 MHz, MICROCONTROLLER, PDIP16 |
| MC68HC705L1B | 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDIP56 |
| MC68HC05L1FU | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQFP64 |
| MC68HC05L1B | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP56 |
| MC68HC705L2B | 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDIP42 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC68HLC908JK3CP | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MC68HLC908QT1CFQ | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MC68HLC908QT4CDW | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MC68HLC908QT4CFQ | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MC68HLC908QY1CDW | 制造商:Rochester Electronics LLC 功能描述:LOW V-1.5K FLASH W/O ADC - Bulk |
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