IA186EB Datasheet, PDF (40/85 Pages) InnovASIC, Inc – 8-Bit/16-Bit Microcontrollers

IA186EB/IA188EB
8-Bit/16-Bit Microcontrollers
Data Sheet
July 10, 2011
Table 8. IA188EB Pin/Signal Descriptions (Continued)
Signal
rxd0
rxd1
s0_n
Name
rxd0
p2.0/rxd1
s0_n
Pin
PLCC LQFP
53
40
57
44
10
79
PQFP
3
7
42
Description
Receive (rx) data, Serial Port 0. Input/Output.
This pin is the serial data input for Serial Port 0.
During synchronous serial communications,
rxd0 is bidirectional and functions an output for
data transmission (txd0 becomes the clock).
Receive (rx) data, Serial Port 1. Input/Output.
This pin is the serial data input for Serial Port 1.
During synchronous serial communications,
rxd1 is bidirectional and functions an output for
data transmission (txd1 becomes the clock).
statusN (N = 0–2). Output. During a bus cycle
the status (i.e., type) of cycle is encoded on
these lines as follows:
s1_n
s1_n
s2_n s1_n s0_n Bus Cycle Status
9
78
41
s2_n
s2_n
0
0
0 Interrupt Acknowledge
0
0
1 Read I/O
0
1
0 Write I/O
8
77
40
0
1
1 Processor HALT
1
0
0 Queue Instruction Fetch
1
0
1 Read Memory
1
1
0 Write Memory
1
1
1 No Bus Activity
sint1 p2.3/sint1 55
42
5 serial interrupt, Serial Port 1. Output. Active
High. When sint1 is asserted (high), it
indicates that Serial Port 1 requires service.
t0in
t0in
46
33
76 timer 0 input. Input. Depending on the Timer
Mode programmed for Timer 0, this input is
used either as clock input or a control signal.
t0out
t0out
45
32
75 timer 0 output. Output. Depending on the
Timer Mode programmed for Timer 0, this
output can provide a single clock or a
continuous waveform.
t1in
t1in
48
35
78 timer 1 input. Input. Depending on the Timer
Mode programmed for Timer 1, this input is
used either as clock input or a control signal.
t1out
t1out
47
34
77 timer 1 output. Output. Depending on the
Timer Mode programmed for Timer 1, this
output can provide a single clock or a
continuous waveform.
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