STPCCONSUMER-S Datasheet, PDF (21/51 Pages) STMicroelectronics – PC Compatible Embeded Microprocessor

Table 2.3. ISA / IDE dynamic multiplexing
.
ISA BUS
(ISAOE# = 0)
RMRTCCS#
KBCS#
RTCRW#
RTCDS
SA[19:8]
LA[23]
LA[22]
SA[21]
SA[20]
LA[19:17]
IO CHRDY
IDE
(ISAOE# = 1)
DD[15]
DD[14]
DD[13]
DD[12]
DD[11:0]
SCS3#
SCS1#
PCS3#
PCS1#
DA[2:0]
DIORDY
Figure 2.2. Typical ISA/IDE Demultiplexing
PIN DESCRIPTION
Table 2.4. ISA / Local Bus pin sharing
.
ISA / IPC
SD[15:0]
DREQ_MUX[1:0]
SMEMR#
MEMW#
BHE#
AEN
ALE
MEMR#
IOR#
IOW #
REF#
IOCHCK#
GPIO CS#
ZWS #
SA[7:4]
TC, DACK_ENC[2:0]
SA[3]
ISAO E#,SA [2:0]
DEV_CLK, RTCAS#
IOCS16#, MASTER#
SMEMW#, MCS16#
ISACLK, ISA_CLK2X
LOCAL BUS
PD[15:0]
PA[21:20]
PA[19]
PA[18]
PA[17]
PA[16]
PA[15]
PA[14]
PA[13]
PA[12]
PA[11]
PA[10]
PA[9]
PA[8]
PA[7:4]
PA[3:0]
PRDY
IOCS#[3:0]
FCS#[1:0]
PRD#[1:0]
PWR#[1:0]
STPC bus / DD[15:0]
MASTER#
ISAOE#
74LS245
A
B
DIR
OE
RMRTCCS#
KBCS#
RTCRW#
RTCDS
SA[19:8]
LA[22]
PCS1#
LA[23]
PCS3#
LA[22]
SCS1#
LA[23]
SCS3#
21/51
Release B
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.