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General Description
Pin Functions
MC68H(R)C908JL3E/JK3E/JK1E
—
Rev. 2.0
Technical Data
MOTOROLA
General Description
29
1.6 Pin Functions
Description of the pin functions are provided in
Table 1-2
.
NOTE:
On the MC68H(R)C908JK3E/JK1E, 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
MC68HC908JL3E/JK3E/JK1E:
X-tal oscillator output, this is the inverting OSC1
signal.
Out
Analog
MC68HRC908JL3E/JK3E/JK1E:
Default is RC oscillator clock output, RCCLK.
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
PTA[0:5] have LED direct sink capability
In
VSS
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[2:3], PTD[6:7] have LED direct sink capability
In
VSS
PTD[6:7] can be configured as 25mA open-drain
output with pull-up.
In/Out
VDD