Chapter 3
Hardware
30
Reference Manual
CoreModule 420
Pin #
Signal
Description
24
NC
Not connected – (IOCS16* = I/O select 16 bit)
25
GND
Digital Ground
26
NC
Not Connected (Card detect)
27
D11
Disk Data 11 – Refer to pin 2, D3, for more information.
28
D12
Disk Data 12 – Refer to pin 2, D3, for more information.
29
D13
Disk Data 13 – Refer to pin 2, D3, for more information.
30
D14
Disk Data 14 – Refer to pin 2, D3, for more information.
31
D15
Disk Data 15 – Refer to pin 2, D3, for more information.
32
CE2*
Card Enable 2 – This signal, along with CE1*, is used to select the
CompactFlash card and indicate to the card when a byte or word operation is
being performed. This signal always accesses the odd byte of the word.
33
NC
Not Connected (VS1*)
34
IOR*
I/O Read Strobe – This signal is generated by the host and gates the I/O data onto
the bus from the CompactFlash card when the card is configured to use the I/O
interface.
35
IOW*
I/O Write Strobe – This signal is generated by the host and clocks the I/O data on
the Card Data bus into the CompactFlash card controller registers when the card
is configured to use the I/O interface. The clock occurs on the negative to
positive edge of the signal (trailing edge).
36
Vcc
+5 volts ±5% power supply (WE)
37
RDY
Drive Ready – IRQ (IRQ 14) is asserted by drive (CF) when it has a pending
interrupt request (PIO transfer of data to or from the drive to the host).
38
Vcc
+5 volts ±5% power supply
39
GND
Grounded (CSEL)
40
NC
Not Connected (VS2*)
41
IDERst*
IDE Reset – This input signal is the active low hardware reset from the host. If
this pin goes high, it is used as the reset signal. This pin is driven high at power-
up, causing a reset, and if left high will cause another reset.
42
IORDY
I/O Channel Ready – When negated, extends the host transfer cycle of any host
register access when the drive is not ready to respond to a data transfer request.
High impedance if asserted.
43
NC
Not Connected – (INPACK =Input Acknowledge)
44
REG*
Registered/Common Memory Access – Tied High for Common Memory Access.
45
ACT/
SLV
Drive Active/Slave Present – Tied High for Master/Slave handshake protocol.
46
NC
Not Connected (PDIAG = Passed Diagnostics)
47
D8
Disk Data 8 – Refer to pin 2, D3, for more information.
48
D9
Disk Data 9 – Refer to pin 2, D3, for more information.
49
D10
Disk Data 10 – Refer to pin 2, D3, for more information.
50
NC
Not Connected (CD2)
Notes:
The shaded area denotes power or ground. The signals marked with * = Negative true logic.
NC = Not connected, NU = Not used.
Содержание CoreModule 420
Страница 1: ...CoreModule 420 PC 104 Single Board Computer Reference Manual P N 5001692A Revision A ...
Страница 6: ...Contents vi Reference Manual CoreModule 420 ...
Страница 10: ...Chapter 1 About this Manual 4 Reference Manual CoreModule 420 ...
Страница 22: ...Chapter 2 Product Overview 16 Reference Manual CoreModule 420 ...
Страница 50: ...Chapter 3 Hardware 44 Reference Manual CoreModule 420 ...
Страница 64: ...Appendix A Technical Support 58 Reference Manual CoreModule 420 ...
Страница 66: ...Appendix B Connector Part Numbers 60 Reference Manual CoreModule 420 ...
Страница 70: ...Index 64 Reference Manual CoreModule 420 ...
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