ia186em Innovasic Semiconductor Inc., ia186em Datasheet - Page 78

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

IA186EM/IA188EM
8-Bit/16-Bit Microcontrollers
Table 41. PIO Pin Assignments (Continued)
a
b
c
and s2_n–s0_n.
d
operation.
The value of the PDATA registers is undefined at reset (see Tables 42 and 43).
Table 42. PDATA 0
Table 43. PDATA 1
When used as a PIO pin, it is an input with a pull-up option available.
When used as a PIO pin, it is an input with a pull-down option available.
Emulators use these pins and also a15–a0, ad15–ad0 (IA186EM), ale, bhe_n (IA186EM), clkouta, nmi, res_n,
If bhe_n/aden_n (IA186EM) or rfsh2_n/aden (IA188EM) is held low during POR, these pins revert to normal
PIO Number
15
15
26
29
24
25
27
28
30
31
14
14
c,d
c,d
Bits [15–0]—PDATA15–PDATA0 PIO Data 0 Bits → This register contains the values of
the bits that are either driven on, or received from, the corresponding PIO pins.
Depending on its configuration, each pin is either an output or an input. The values of
these bits correspond to those in the PIO Direction registers and PIO Mode registers.
Bits [15–0]—PDATA31–PDATA16 PIO Data 1 Bits → This register contains the values
of the bits that are either driven on, or received from, the corresponding PIO pins.
Depending on its configuration, each pin is either an output or an input. The values of
these bits correspond to those in the PIO direction registers and PIO Mode registers
The PIO pins may be operated as open-drain outputs by:
– Maintaining the data constant in the appropriate bit of the PIO data register.
– Writing the value of the data bit into the respective bit position of the PIO Direction
13
13
register, so that the output is either 0 or disabled depending on the value of the data
bit.
Associated Pin Name
mcs2_n
mcs3_n/rfsh_n
uzi
txd
rxd
s6/clkdiv2_n
int4
int2
12
12
11
11
®
PDATA31–PDATA16
PDATA15–PDATA0
10
10
9
9
8
8
7
7
Power-On Reset Status
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
UNCONTROLLED WHEN PRINTED OR COPIED
6
6
5
5
Page 78 of 145
IA211050831-16
4
4
3
3
2
2
1
1
0
0
December 24, 2008
http://www.Innovasic.com
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Data Sheet
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