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S80L186EB16 Datasheet(PDF) 37 Page - InnovASIC, Inc

Part # S80L186EB16
Description  8-Bit/16-Bit Microcontrollers
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Manufacturer  INNOVASIC [InnovASIC, Inc]
Direct Link  http://www.innovasic.com
Logo INNOVASIC - InnovASIC, Inc

S80L186EB16 Datasheet(HTML) 37 Page - InnovASIC, Inc

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IA186EB/IA188EB
Data Sheet
8-Bit/16-Bit Microcontrollers
July 10, 2011
IA211080314-13
http://www.Innovasic.com
UNCONTROLLED WHEN PRINTED OR COPIED
Customer Support:
Page 37 of 85
1-888-824-4184
Table 8. IA188EB Pin/Signal Descriptions (Continued)
Signal
Pin
Description
Name
PLCC
LQFP
PQFP
inta1_n
int3/inta1_n
34
22
65
interrupt acknowledge 1. Input/Output. Active
Low. This pin provides an interrupt
acknowledge handshake in response to an
interrupt request on the int1 pin (see previous
table entry).
lcs_n
lcs_n
29
17
60
lower chip select. Input/Output. Active Low.
This pin provides a chip select signal that will be
asserted (low) whenever the address of a
memory bus cycle is within the address space
programmed for that output.
lock_n
lock_n
15
4
47
lock. Output. Active Low. When asserted
(low), this signal indicates that the bus cycle in
progress is cannot be interrupted. While
lock_n is active, the IA188EB will not service
bus requests such as HOLD.
nmi
nmi
17
5
48
non-maskable interrupt. Input. Active High.
When the nmi signal is asserted (high), it
causes a Type 2 interrupt to be serviced by the
IA188EB.
Note: The assertion of nmi is latched internally
by the IA188EB.
once_n
a19/once_n
83
69
32
on-circuit emulation. Input. Active Low. Note:
ONCE Mode is used for device testing.
If the once_n pin is driven low during reset, all
IA188EB output and input/output pins are
placed in a high-impedance state.
This pin is weakly held high while resin_n is
active.
oscout
oscout
40
27
70
oscillator output. Output. The oscout pin is
the output connection for an external crystal
that drives the IA188EB internal Pierce
oscillator. (When an external crystal is used, it
is connected between this pin and the clkin
pin
—see clkin table entry.)
Note: If an external oscillator or clock source is
used to drive the IA188EB instead of a crystal,
oscout must be left unconnected (i.e., must
float). When the IA188EB is operating in the
ONCE mode, oscout does not float.


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