LSI Symbios SYM53C040, Technical Manual

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