IA80C152_10 Datasheet, PDF (19/61 Pages) InnovASIC, Inc – Universal Communications Controller

IA80C152
Universal Communications Controller
Data Sheet
July 29, 2010
Table 6. I/O Signal Descriptions (Continued)
Signal Name
P4.0
P4.1
P4.2
P4.3
P4.4
P4.5
P4.6
P4.7
P5.0
P5.1
P5.2
P5.3
P5.4
P5.5
P5.6
P5.7
P6.0
P6.1
P6.2
P6.3
P6.4
P6.5
P6.6
P6.7
VCC
VSS
XTAL1
XTAL2
Description
Port 4—8-bit bi-directional port that is bit addressable. To use a port signal
as an input, write a 1 to the port location. Internal pull-ups pull the input
high and source current when the input is driven low. To use a port signal
as an output, a 1 or 0 written to the port location is presented at the output.
Port 5—8-bit bi-directional port that is NOT bit addressable. To use the port
as an input, write a 1 to the port location. Internal pull-ups pull the input
high and source current when the input is driven low. To use the port as an
output, 1s or 0s written to the port are presented at the output.
This port also provides the low-byte of the multiplexed address and data
bus depending on the state of EBEN.
Port 6—8-bit bi-directional port that is NOT bit addressable. To use the port
as an input, write a 1 to the port location. Internal pull-ups pull the input
high and source current when the input is driven low. To use the port as an
output, 1s or 0s written to the port are presented at the output.
This port also provides the high-byte of the multiplexed address and data
bus depending on the state of EBEN.
Supply Voltage
Device Ground
Input to the internal clock generator
Output from the internal oscillator amplifier
®
IA211040524-06
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