参数资料
型号: MC68HC908JL8MP
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDIP28
封装: PLASTIC, DIP-28
文件页数: 41/56页
文件大小: 648K
代理商: MC68HC908JL8MP
MC68HC908JL8SM/D
MC68HC908JL8MC68HC908JK8
PTA6EN — Enable PTA6 on OSC2
This read/write bit configures the OSC2 pin function when RC oscillator
option is selected. This bit has no effect for XTAL oscillator option.
1 = OSC2 pin configured for PTA6 I/O, and has all the interrupt and pull-
up functions
0 = OSC2 pin outputs the RC oscillator clock (RCCLK)
PTAPUE[7:0] — Port A Input Pull-up Enable Bits
These read/write bits are software programmable to enable pull-up devices
on port A pins.
1 = Corresponding port A pin configured to have internal pull-up if its
DDRA bit is set to 0
Port B
Port B is an 8-bit special function port that shares all of its port pins with the
analog-to-digital converter (ADC) module.
Port B Data Register
PTB[7:0] — Port B Data Bits
These read/write bits are software programmable. Data direction of each
port B pin is under the control of the corresponding bit in data direction
register B. Reset has no effect on port B data.
Data Direction
Register B
DDRB[7:0] — Data Direction Register B Bits
1 = Corresponding port B pin configured as output
0 = Corresponding port B pin configured as input
$000E
Bit 7
654321
Bit 0
PTAPUE7
Reset:
00000000
Figure 42. PTA7 Input Pull-up Enable Register (PTA7PUE)
$0001
Bit 7
65432
1
Bit 0
PTB7
PTB6
PTB5
PTB4
PTB3
PTB2
PTB1
PTB0
Reset:
Unaffected by reset
Additional Function:
ADC7
ADC6
ADC5
ADC4
ADC3
ADC2
ADC1
ADC0
Figure 43. Port B Data Register (PTB)
$0005
Bit 7
65432
1
Bit 0
DDRB7
DDRB6
DDRB5
DDRB4
DDRB3
DDRB2
DDRB1
DDRB0
Reset:
0
00000
00
Figure 44. Data Direction Register B (DDRB)
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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