參數(shù)資料
型號(hào): MC68HRC908JL3CP
廠商: MOTOROLA INC
元件分類(lèi): 微控制器/微處理器
英文描述: MC68HC908JK1
中文描述: 8-BIT, FLASH, 4 MHz, MICROCONTROLLER, PDIP28
封裝: PLASTIC, DIP-28
文件頁(yè)數(shù): 26/83頁(yè)
文件大小: 1923K
代理商: MC68HRC908JL3CP
General Description
Technical Data
MC68H(R)C908JL3
Rev. 1.0
26
General Description
MOTOROLA
1.6 Pin Functions
Description of the pin functions are provided in
Table 1-2
.
NOTE:
On the 20-pin package, the following pins are not available:
PTA0, PTA1, PTA2, PTA3, PTA4, PTA5, PTD0, and PTD1.
Table 1-2. Pin Functions
PIN NAME
PIN DESCRIPTION
IN/OUT
VOLTAGE LEVEL
VDD
Power supply.
In
5V or 3V
VSS
Power supply ground
Out
0V
RST
RESET input, active low.
With Internal pull-up and schmitt trigger input.
Input
VDD
IRQ1
External IRQ pin.
With software programmable internal pull-up and
schmitt trigger input.
This pin is also used for mode entry selection.
Input
VDD to VDD+V
HI
OSC1
X-tal or RC oscillator input.
In
Analog
OSC2
For X-tal oscillator option:
X-tal oscillator output, this is the inverting OSC1
signal.
Out
Analog
For RC oscillator option:
Default is RCCLK output.
Shared with PTA6/KBI6, with programmable pull-up.
In/Out
VDD
PTA[0:6]
7-bit general purpose I/O port.
In/Out
VDD
Shared with 7 keyboard interrupts KBI[0:6].
In
VDD
Each pin has programmable internal pull-up device.
In
VDD
PTB[0:7]
8-bit general purpose I/O port.
In/Out
VDD
Shared with 8 ADC inputs, ADC[0:7].
In
Analog
PTD[0:7]
8-bit general purpose I/O port.
In/Out
VDD
PTD[3:0] shared with 4 ADC inputs, ADC[8:11].
Input
Analog
PTD[4:5] shared with TIM channels, TCH0 and TCH1.
In/Out
VDD
PTD[6:7] can be configured as 25mA open-drain
output with pull-up.
In/Out
VDD
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