IA8044/IA8344
SDLC Communications Controller
Data Sheet
March 30, 2010
Table 11. Port 0 Register
7
P0.7
6
P0.6
5
P0.5
4
P0.4
3
P0.3
2
P0.2
1
P0.1
0
P0.0
4.6.2
Port 1 (P1)
Table 12 presents the values for Port 1 (P1), a general purpose, eight-bit, I/O port with pullups and
auxiliary functions.
Table 12. Port 1 Register
7
CTS/P1.7
6
RTS/P1.6
5
P1.5
4
P1.4
3
P1.3
2
P1.2
1
P1.1
0
P1.0
Bit [7]—P1.7/Clear To Send input
Bit [6]—P1.6/Request To Send output
Bit [5]—P1.5
Bit [4]—P1.4
Bit [3]—P1.3
Bit [2]—P1.2
Bit [1]—P1.1
Bit [0]—P1.0
4.6.3
Port 2 (P2)
Table 13 presents the values for Port 2, a general purpose, 8-bit, I/O port with pullups and high
order address bus.
Table 13. Port 2 Register
7
P2.7
6
P2.6
5
P2.5
4
P2.4
3
P2.3
2
P2.2
1
P2.1
0
P2.0
4.6.4
Port 3 (P3)
Table 14 presents the values for Port 2, a general purpose, 8-bit I/O port with pullups and auxiliary
functions. Bits on this port also function as the SIU data transmit/receive I/O, external interrupt
inputs, timer inputs and the read and write strobes for external memory accesses.
®
IA211010112-04
UNCONTROLLED WHEN PRINTED OR COPIED
Page 25 of 65
Customer Support:
1-888-824-4184
INNOVASIC [ INNOVASIC, INC ]
