Revision 1.1
51
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G
General Configuration Block
(Continued)
25
AC97CKEN (Enable AC97_CLK Output).
This bit enables the output drive of AC97_CLK (ball AC21).
0: AC97_CLK output is HiZ.
1: AC97_CLK output is enabled.
Reserved:
Always write 0.
GPSEL1 (Select Functions/Commands
)
.
Selects ball functions.
0: GPIO/IO Command Signal
Ball #
Name
Add’l Dependencies
D22
GPIO14
PMR[2] = 0
IOCS1#
PMR[2] = 1
C22
IOW#
PMR[2] = 0
GPIO15
PMR[2] = 1
Reserved.
Must be set to 0.
AB2SEL (Select ACCESS.bus 2).
Selects ball functions.
0: GPIO Signal
Ball #
Name
Add’l Dependencies
AE23
GPIO12
PMR[27] and FPCI_MON = 0
F_AD3
PMR[27] or FPCI_MON = 1
AD23
GPIO13
PMR[27] and FPCI_MON = 0
F_AD4
PMR[27] or FPCI_MON = 1
SPSEL (Select SP Functions).
Selects ball functions.
0: GPIO/IDE Signal
Ball #
Name
Add’l Dependencies
AD12
GPIO6
PMR[8] = 0 and Note
IDE_IOR1#
PMR[8] = 1 and Note
INTR_O
PMR[27] or FPCI_MON = 1
AE12
GPIO9
PMR[8] = 0 and Note
IDE_IOW1#
PMR[8] = 1 and Note
F_IRDY#
PMR[27] or FPCI_MON = 1
AF12
GPIO10
PMR[8] = 0 and Note
IDE_IORDY1
PMR[8] = 1 and Note
F_FRAME#
PMR[27] or FPCI_MON = 1
AF19
GPIO11
PMR[8] = 0
IRQ15
PMR[8] = 1
Note:
PMR[27] and FPCI_MON = 0.
SPCRSEL (Select SP2 Flow Control).
Selects ball functions.
0: GPIO/IDE Signal
Ball #
Name
Add’l Dependencies
AF11
GPIO7
PMR[8] = 0 and Note
IDE_DACK1#
PMR[8] = 1 and Note
F_C/BE3#
PMR[27] or FPCI_MON = 1
AC12
GPIO8
PMR[8] = 0 and Note
IDE_DREQ1
PMR[8] = 1 and Note
SMI_O
PMR[27] or FPCI_MON = 1
Note:
PMR[27] and FPCI_MON = 0.
SERISEL (Select SERIRQ Function)
. Selects ball function.
0: GPIO Signal
Ball #
Name
Add’l Dependencies
A24
GPIO39
None
Reserved:
Always write 0.
24:22
21
1: DOC/NAND Signal
Name
IOR#
DOCR#
IOW#
DOCR#
Add’l Dependencies
PMR[2] = 0
PMR[2] = 1
PMR[2] = 0
PMR[2] = 1
20
19
1: ACCESS.bus 2 Signal
Name
AB2C
F_AD3
AB2D
F_AD4
Add’l Dependencies
PMR[27] and FPCI_MON = 0
PMR[27] or FPCI_MON = 1
PMR[27] and FPCI_MON = 0
PMR[27] or FPCI_MON = 1
18
1: Serial Port Signal
Name
Add’l Dependencies
DTR#/BOUT
Undefined
INTR_O
DCD#
Undefined
F_IRDY#
DSR#
Undefined
F_FRAME#
RI#
Undefined
PMR[8] = 0 and Note
PMR[8] = 1 and Note
PMR[27] or FPCI_MON = 1
PMR[8] = 0 and Note
PMR[8] = 1 and Note
PMR[27] or FPCI_MON = 1
PMR[8] = 0 and Note
PMR[8] = 1 and Note
PMR[27] or FPCI_MON = 1
PMR[8] = 0
PMR[8] = 1
17
1: Serial Port Signal
Name
RTS
Undefined
F_C/BE3#
CTS#
Undefined
F_C/BE3#
Add’l Dependencies
PMR[8] = 0 and Note
PMR[8] = 1 and Note
PMR[27] or FPCI_MON = 1
PMR[8] = 0 and Note
PMR[8] = 1 and Note
PMR[27] or FPCI_MON = 1
16
1: Serial IRQ Signal
Name
SERIRQ
Add’l Dependencies
None
15
Table 3-2. Multiplexing, Interrupt Selection, and Base Address Registers (Continued)
Bit
Description