参数资料
型号: MC68HC908JL8CSPE
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, PDIP32
封装: SDIP-32
文件页数: 42/56页
文件大小: 648K
代理商: MC68HC908JL8CSPE
MC68HC908JL8SM/D
Input/Output (I/O) Ports
MC68HC908JL8MC68HC908JK8
Port D
Port D is an 8-bit special function port that shares two of its pins with the serial
communications interface module, two of its pins with the timer 1 interface
module, and four of its pins with the analog-to-digital converter module. PTD6
and PTD7 each has high current sink (25mA) and programmable pull-up.
PTD2, PTD3, PTD6 and PTD7 each has LED sink capability.
NOTE:
PTD0–PTD1 are available on 28-pin and 32-pin packages only.
Port D Data Register
PTD[7:0] — Port D Data Bits
These read/write bits are software programmable. Data direction of each
port D pin is under the control of the corresponding bit in data direction
register D. Reset has no effect on port D data.
Data Direction
Register D
DDRD[7:0] — Data Direction Register D Bits
1 = Corresponding port B pin configured as output
0 = Corresponding port B pin configured as input
NOTE:
For MC68HC908JK8 (devices packaged in a 20-pin package), PTD0–PTD1
and are not connected. DDRD0–DDRD1 should be set to a 1 to configure
PTD0–PTD1 as outputs.
Port D
Control Register
$0003
Bit 7
65432
1
Bit 0
PTD7
PTD6
PTD5
PTD4
PTD3
PTD2
PTD1
PTD0
Reset:
Unaffected by reset
Additional Function:
RxD
TxD
T1CH1
T1CH0
ADC8
ADC7
ADC6
ADC5
Figure 45. Port D Data Register (PTD)
$0007
Bit 7
65432
1
Bit 0
DDRD7
DDRD6
DDRD5
DDRD4
DDRD3
DDRD2
DDRD1
DDRD0
Reset:
0
00000
00
Figure 46. Data Direction Register B (DDRB)
$000A
Bit 7
654321
Bit 0
SLOWD7 SLOWD6
PTDPU7
PTDPU6
Reset:
00000000
Figure 47. Port D Control Register (PDCR)
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For More Information On This Product,
Go to: www.freescale.com
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PDF描述
MC68HC908JL8CSP 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDIP32
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