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W83877ATF Datasheet, PDF (11/191 Pages) Winbond – enhanced version from Winbonds most popular I/O chip W83877F
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W83877ATF
1.1 Host Interface, continued
SYMBOL PIN
I/O
IRQ_H
IRSL2
DACK_ D
91
OUT12t
OUT12t
INts
SERIRQ
OUT12t
CLKIN
7
INt
SMI
8
OUT12t
FUNCTION
Interrupt request signal H.
IR module mode selection 2.
DMA acknowledge signal D.
Serial Interrupt output, when the function of the serial IRQ is set
to logic 1 defined in the CR31.bit2 (IRQMODS).
24MHz/48MHZ clock input. CLKINSEL bit in CR2C register
should be correctly reset/set according to the input frequency.
For the power management, the SMI is and active low by the
power management events, that generate an nSCI in ACPI
mode.
1.2 Serial Port Interface
SYMBOL PIN
I/O
CTSA
34
INt
CTSB
47
INt
A12
INt
DSRA
33
INt
DSRB
48
INt
A13
DCDA
DCDB
A14
RIA
INt
32
INt
49
INt
INt
31
INt
FUNCTION
Clear To Send is the modem control input.
Clear To Send is the modem control input.
System address bus bit 12, when 16-bit address decoder is
selected, that is, nEN16SA (CR16.bit6) is set to logic 0.
Data Set Ready. An active low indicates the modem or data set
is ready to establish a communication link and transfer data to
the UART.
Data Set Ready. An active low indicates the modem or data set
is ready to establish a communication link and transfer data to
the UART.
System address bus bit 13, when 16-bit address decoder is
selected.
Data Carrier Detect. An active low indicates the modem or data
set has detected a data carrier.
Data Carrier Detect. An active low indicates the modem or data
set has detected a data carrier.
System address bus bit 14, when 16-bit address decoder is
selected.
Ring Indicator. An active low indicates that a ring signal is being
received by the modem or data set.
Publication Release Date: April 1998
-7-
Version 0.51
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