
AMD Geode™ SC2200 Processor Data Book
61
Signal Definitions
32580B
3.4.7
Sub-ISA Interface Signals
Signal Name
Ball No.
Type
Description
Mux
A[23:0]
See
Table 3-3
on page
41.
O
Address Lines
AD[23:0]
D15
See
Table 3-3
on page
41.
I/O
Data Bus
STOP#
D14
IRDY#
D13
TRDY#
D12
PAR
D11
C/BE3#
D10
C/BE2#
D9
C/BE1#
D8
C/BE0#
D[7:0]
AD[31:24]
BHE#
E4
O
Byte High Enable.
With A0, defines byte accessed for
16 bit wide bus cycles.
DEVSEL#
IOCS1#
D10
O
I/O Chip Selects
GPIO1+TFTD12
N30
AB1D+GPIO1
IOCS0#
A10
TFTDCK
ROMCS#
C8
O
ROM or Flash ROM Chip Select
BOOT16 (Strap)
DOCCS#
A9
O
DiskOnChip or NAND Flash Chip Select
TFTD0
N31
AB1C+GPIO20
TRDE#
D11
O
Transceiver Data Enable Control.
Active low for Sub-
ISA data transfers. The signal timing is as follows:
•
In a read cycle, TRDE# has the same timing as RD#.
•
In a write cycle, TRDE# is asserted (to active low) at
the time WR# is asserted. It continues being asserted
for one PCI clock cycle after WR# has been negated,
then it is negated.
GPIO0
RD#
B8
O
Memory or I/O Read.
Active on any read cycle.
CLKSEL0 (Strap)
WR#
B9
O
Memory or I/O Write.
Active on any write cycle.
---
IOR#
D9
O
I/O Read.
Active on any I/O read cycle.
DOCR#+GPIO14
IOW#
A8
O
I/O Write.
Active on any I/O write cycle.
DOCW#+GPIO15
DOCR#
D9
O
DiskOnChip or NAND Flash Read.
Active on any mem-
ory read cycle to DiskOnChip.
IOR#+GPIO14
DOCW#
A8
O
DiskOnChip or NAND Flash Write.
Active on any mem-
ory write cycle to DiskOnChip.
IOW#+GPIO15
IRQ9
AA3
I
Interrupt 9 Request Input.
Active high.
Note:
If IRQ9 function is selected but not used, tie
IRQ9 low.
IDE_DATA6
IOCHRDY
C9
I
I/O Channel Ready
Note:
If IOCHRDY function is selected but not used, tie
IOCHRDY high.
INTC#
Содержание Geode SC2200
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Страница 16: ...16 AMD Geode SC2200 Processor Data Book Overview 32580B...
Страница 70: ...74 AMD Geode SC2200 Processor Data Book Signal Definitions 32580B...
Страница 350: ...366 AMD Geode SC2200 Processor Data Book Debugging and Monitoring 32580B...
Страница 422: ...440 AMD Geode SC2200 Processor Data Book Electrical Specifications 32580B...
Страница 426: ...446 AMD Geode SC2200 Processor Data Book Package Specifications 32580B Figure 10 3 BGU481 Package Bottom View...