ia186em Innovasic Semiconductor Inc., ia186em Datasheet - Page 77

• Manufacturer Part Number: ia186em
• Description: 8-bit/16-bit Microcontrollers
• Manufacturer: Innovasic Semiconductor Inc.

IA186EM/IA188EM
8-Bit/16-Bit Microcontrollers
5.1.24 PDATA1 (07ah) and PDATA0 (074h)
PIO DATA Registers. When a PIO pin is configured as an output, the value in the
corresponding PIO data register bit is driven onto the pin. However, if the PIO pin is configured
as an input, the value on the pin is put into the corresponding bit of the PIO data register.
Table 41 lists the default states for the PIO pins.
Table 41. PIO Pin Assignments
PIO Number
10
11
12
13
14
15
16
17
18
19
20
21
22
23
7
8
9
0
1
2
3
4
5
6
c
c
c
Bit [1]—RSIE Receive Status Interrupt Enable → When an exception occurs during data
reception, an interrupt request is generated if enabled by this bit (RSIE = 1). Interrupt
requests are made for the error conditions listed in the serial port status register (BRK,
OER, PER, and FER). This bit is 0 at reset.
Bit [0]—RMODE Receive Mode → When this bit is 1, the receive section of the serial
port is enabled. When 0, it is disabled. This bit is 0 at reset.
Associated Pin Name
tmrin1
tmrout1
pcs6/a2
pcs5/a1
dt/r_n
den_n/ds_n
srdy
a17
a18
a19
tmrout0
tmrin0
drq0
drq1
mcs0_n
mcs1_n
pcs0_n
pcs1_n
pcs2_n
pcs3_n
sclk
sdata
sden0
sden1
®
Power-On Reset Status
Input with pull-up
Input with pull-down
Input with pull-up
Input with pull-up
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Input with pull-down
Input with pull-up
Input with pull-up
Input with pull-up
Input with pull-up
Input with pull-up
Input with pull-up
Input with pull-up
Input with pull-up
Input with pull-up
Input with pull-up
Input with pull-up
Input with pull-down
Input with pull-down
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Page 77 of 145
IA211050831-16
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December 24, 2008
http://www.Innovasic.com
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