IA80C152_10 Datasheet, PDF (18/61 Pages) InnovASIC, Inc – Universal Communications Controller

IA80C152
Universal Communications Controller
Data Sheet
July 29, 2010
Table 6. I/O Signal Descriptions (Continued)
Signal Name
Description
P1.0 - GRXD, GSC
Port 1—8-bit bi-directional port that is bit addressable. To use a port signal
Receive
as an input, write a 1 to the port location. Internal pull-ups pull the input
P1.1 - GTXD, GSC
high and source current when the input is driven low. To use a port signal
Transmit
as an output, a 1 or 0 written to the port location is presented at the output.
P1.2 - DENn, Driver Enable
P1.3 - TXCn, External
Port signals in this port also serve as I/O for IA80C152 functions. These I/O
Transmit Clock
signals are defined next to the port name.
P1.4 - RXCn, External
Receive Clock
P1.5 - HLDn, DMA Hold
P1.6 - HLDAn, DMA Hold
Acknowledge
P1.7
P2.0
Port 2—8-bit bi-directional port that is bit addressable. To use a port signal
P2.1
as an input, write a 1 to the port location. Internal pull-ups pull the input
P2.2
high and source current when the input is driven low. To use a port signal
P2.3
as an output, a 1 or 0 written to the port location is presented at the output.
P2.4
P2.5
This port also provides the high-byte of the multiplexed address and data
P2.6
bus depending on the state of EBEN.
P2.7
P3.0 - RXD, UART Receive Port 3—8-bit bi-directional port that is bit addressable. To use a port signal
P3.1 - TXD, UART
as an input, write a 1 to the port location. Internal pull-ups pull the input
Transmit
high and source current when the input is driven low. To use a port signal
P3.2 - INT0n, External
as an output, a 1 or 0 written to the port location is presented at the output.
Interrupt 0
P3.3 - INT1n, External
Port signals in this port also serve as I/O for IA80C152 functions. These I/O
Interrupt 1
signals are defined next to the port name.
P3.4 - T0, Timer 0 External
Input
P3.5 - T1, Timer 1 External
Input
P3.6 - WRn, External Data
Memory Write Strobe
P3.7 - RDn, External Data
Memory Read Strobe
®
IA211040524-06
http://www.Innovasic.com
UNCONTROLLED WHEN PRINTED OR COPIED
Customer Support:
Page 18 of 61
1-888-824-4184