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ST40RA Datenblatt(PDF) 89 Page - STMicroelectronics

Teilenummer ST40RA
Bauteilbeschribung  32-bit Embedded SuperH Device
PDF  94 Pages
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Hersteller  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST40RA Datenblatt(HTML) 89 Page - STMicroelectronics

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B Implementation restrictions
ST40RA
89/94
STMicroelectronics
ADCS 7260755H
B.6
PIO
B.6.1
PIO default functionality following reset
In the ST40 family device, the operational modes for these registers differ from the standard
architecture definition and are shown in
Table 39.
B.6.2
PCI/PIO alternate functions
The following PIO signals cannot be used when PCI is enabled even if the PCI implementation does
not require the primary pin function.
If PCI is disabled, the alternate functions may be used.
PIO bit configuration
PIO output state
PIO.PC2
PIO.PC1
PIO.PC0
NonPIO functiona
a. State following reset
-0
0
0
PIO bidirectional
Open drain
0
0
1
PIO output
Push-pull
0
1
0
PIO bidirectional
Open drain
0
1
1
PIO input
High impedance
1
0
0
PIO input
High impedance
1
0
1
Reserved
-
1
1
0
Reserved
-
1
1
1
Table 39: PIO alternate function registers
Pin name
BPN
Architecture
signal name
Pin function
Pin
Row
Col
Default
Alternate
Type
Dir
NOTPREQ0
E
18
NOTPCI_REQ0
PCI external request for bus
PIO16
P8
I/O
I/O
NOTPREQ1
E
17
NOTPCI_REQ1
PCI external request for bus
PIO18
P8
I
I/O
NOTPREQ2
F
16
NOTPCI_REQ2
PCI external request for bus
PIO20
P8
I
I/O
NOTPREQ3
G
16
NOTPCI_REQ3
PCI external request for bus
PIO22
EMPIDREQ1
P8
I
I/O
O
Table 40: PCI/PIO alternate functions



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