参数资料
型号: ST40RA150XH6
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 150 MHz, RISC PROCESSOR, PBGA372
封装: 27 X 27 MM, BGA-372
文件页数: 83/90页
文件大小: 672K
代理商: ST40RA150XH6
84/88
ST40RA166
B Implementation restrictions
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 37.
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
PIO bidirectional
Open drain
0
1
PIO output
Push-pull
0
1
0
PIO bidirectional
Open drain
0
1
PIO input
High impedance
1
0
PIO input
High impedance
1
0
1
Reserved
-
1
0
Reserved
-
1
Table 37: PIO alternate function registers
Pin name
BPN
Architecture
signal name
Pin function
Pin
Row
Col
Default
Alternate
Type
Dir
NOTPREQ
0E
18
NOTPCI
_REQ0
PCI external request for bus
PIO
16
P8
I/O
NOTPREQ
1E
17
NOTPCI
_REQ1
PCI external request for bus
PIO
18
P8
I
I/O
NOTPREQ
2F
16
NOTPCI
_REQ2
PCI external request for bus
PIO
20
P8
I
I/O
NOTPREQ
3G
16
NOTPCI
_REQ3
PCI external request for bus
PIO
22
EMPIDREQ
1
P8
I
I/O
O
Table 38: PCI/PIO alternate functions
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