M80C186EB-13 Просмотр технического описания (PDF) - Intel
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M80C186EB-13 Datasheet PDF : 56 Pages
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M80C186EB
Name
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
Table 4 M80C186EB Pin Descriptions (Continued)
Type
Description
I
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
IO
A(E L)
H(1)
R(Z)
P(1)
IO
A(L)
H(X)
R(Z)
P(X)
I
A(L)
O
H(X) H(Q)
R(1)
P(X) P(Q)
IO
A(L)
R(Z)
H(Q)
P(X)
I
A(L) A(E)
O
H(X) H(Q)
R(0)
P(X) P(Q)
These pins provide a multiplexed function As inputs they provide a
maskable INTerrupt that will cause 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
Bidirectional open-drain Port pins
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
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
Receive Data input accepts serial data information RXD1 is multiplexed
with an input only Port function During synchronous serial communications
RXD is bi-directional and will become an output for transmission or data
(TXD becomes the clock)
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 M80C186EB
Serial INTerrupt output will go active to indicate serial channel 1 requires
service SINT1 is multiplexed with an output only Port function
18
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