80C186EB Datasheet, PDF (13/59 Pages) Intel Corporation – 16-BIT HIGH-INTEGRATION EMBEDDED PROCESSORS

80C186EB 80C188EB 80L186EB 80L188EB
Pin
Name
T0OUT
T1OUT
T0IN
T1IN
INT0
INT1
INT4
INT2 INTA0
INT3 INTA1
P2 7
P2 6
CTSO
P2 4 CTS1
TXD0
P2 1 TXD1
RXD0
P2 0 RXD1
P2 5 BCLK0
P2 2 BCLK1
P2 3 SINT1
Pin
Type
O
I
I
IO
IO
I
O
IO
I
O
Table 3 Pin Descriptions (Continued)
Input
Type
Output
States
Description
H(Q)
R(1)
P(Q)
Timer OUTput pins can be programmed to provide a
single clock or continuous waveform generation
depending on the timer mode selected
A(L)
Timer INput is used either as clock or control signals
A(E)
depending on the timer mode selected
A(E L)
Maskable INTerrupt input will cause a vector to a
specific Type interrupt routine To allow interrupt
expansion INT0 and or INT1 can be used with
INTA0 and INTA1 to interface with an external slave
controller
A(E L)
H(1)
These pins provide a multiplexed function As inputs
R(Z)
they provide a maskable INTerrupt that will cause
P(1)
the CPU to vector to a specific Type interrupt routine
As outputs each is programmatically controlled to
provide an INTERRUPT ACKNOWLEDGE
handshake signal to allow interrupt expansion
A(L)
H(X)
BI-DIRECTIONAL open-drain Port pins
R(Z)
P(X)
A(L)
Clear-To-Send input is used to prevent the
transmission of serial data on their respective TXD
signal pin CTS1 is multiplexed with an input only port
function
H(X) H(Q)
R(1)
P(X) P(Q)
Transmit Data output provides serial data
information TXD1 is multiplexed with an output only
Port function During synchronous serial
communications TXD will function as a clock output
A(L)
R(Z)
Receive Data input accepts serial data information
H(Q)
RXD1 is multiplexed with an input only Port function
P(X)
During synchronous serial communications RXD is
bi-directional and will become an output for
transmission or data (TXD becomes the clock)
A(L) A(E)
Baud CLocK input can be used as an alternate clock
source for each of the integrated serial channels
BCLKx is multiplexed with an input only Port function
and cannot exceed a clock rate greater than one-half
the operating frequency of the processor
H(X) H(Q)
R(0)
P(X) P(X)
Serial INTerrupt output will go active to indicate
serial channel 1 requires service SINT1 is
multiplexed with an output only Port function
NOTE
Pin names in parentheses apply to the 80C188EB 80L188EB
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