Safety Mode Signals; Miscellaneous Signals; Scsi Signals - LSI Symbios SYM53C040 Technical Manual

3.1 Safety Mode Signals

3.1.1 Miscellaneous Signals

Table 3.5

Miscellaneous Signals

Pin Pin
Name Number
A8 2
A9 3
A10 4
A11 5
A12 6
A13 7
A14 8
A15 9
AD0 20
AD1 19
AD2 18
AD3 17
AD4 16
AD5 15
AD6 14
AD7 13
The Safety Mode Signals section contains tables describing the signals
for the following signal groups:
JTAG Signals and Power and Ground
Table 3.5 describes the signals for the Miscellaneous Signals group.
BGA Ball
Number
C3 High byte of the
E5 microcontroller address bus.
C1 An external pull-up on the A11
D3 pin causes the serial ROM
D2 download to use the 2-wire
E4 serial interface 1. If no
D1 external pull-up is used the
E3 download will use the 2-wire
serial interface 0.
A[10:8] are used to select a
chip address for the serial
ROM. For more information on
the possible addresses, see
Table 2.4.
For more information on these
power-up options, see
Chapter
G4 Low byte of the
G1 microcontroller multiplexed
G2 address/data bus.
G3 An external pull-up on AD[1:0]
F5 enables automatic branch
F1 generation. For information on
F2 the branch values, see
F3 Table 2.3.
An external pull-up on AD5
causes the SYM53C040 to
download firmware from a
serial ROM at power on.
For more information on these
power-up options, see
Chapter
Safety Mode Signals
Miscellaneous
Signals.
Description
2.
2.
Signals, SCSI Signals,
Pad Type
4 mA, 5 V tolerant
TTL bidirectional
4 mA, 5 V tolerant
TTL bidirectional
Internal
Resistor
100 µA
pull-
down
100 µA
pull-
down
3-9