
PCI/CardBus signals
22
NS9750B-A1 Datasheet 03/2006
PCI/CardBus signals
Most of the CardBus signals are the same as the PCI signals. Other CardBus signals are unique and
multiplexed with PCI signals for the NS9750B-A1. Table 11 shows these unique signals.
R26 serr_n
2
N/A I/O System error:
Input: pci_central_resource_n = 0
Output: pci_central_resource_n = 1
R24 stop_n
2
N/A I/O Stop signal
T25 trdy_n
2
N/A I/O Target ready
AC24 pci_arb_gnt_1_n
6
N/A O PCI channel 1 grant
AD23 pci_arb_gnt_2_n
6
N/A O PCI channel 2 grant
AE24 pci_arb_gnt_3_n
6
N/A O PCI channel 3 grant
AD25 pci_arb_req_1_n
2
N/A I PCI channel 1 request
AB23 pci_arb_req_2_n
2
N/A I PCI channel 2 request
AC22 pci_arb_req_3_n
2
N/A I PCI channel 3 request
AF23 pci_central_resource_n D N/A I PCI internal central resource enable
AF25 pci_int_a_n
2
N/A I/O PCI interrupt request A, output if external central
resource used
AF24 pci_int_b_n
2
N/A I/O PCI interrupt request B, CCLKRUN# for CardBus
applications
AE23 pci_int_c_n
2
N/A I PCI interrupt request C
AD22 pci_int_d_n
2
N/A I PCI interrupt request D
AE26 pci_reset_n
3
N/A I/O PCI reset, output if internal central resource
enabled
AB24 pci_clk_in U N/A I PCI clock in. (Connected to pci_clk_out or an
externally generated PCI reference clock.)
AA23 pci_clk_out N/A O PCI clock out
PCI signal CardBus signal CardBus type Description
INTA# CINT#
4
Input CardBus interrupt pin. The INTA2PCI pin in the
PCI Miscellaneous Support register must be
set to 0.
Table 11: CardBus IO muxed signals
Pin # Signal Name
U/D
OD
(mA)
I/O Description
Table 10: PCI interface pinout
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