Avago Technologies LSI53C1020 - Manual (Page 72)

3-16 Signal Description
Version 2.4 Copyright © 2001–2004 by LSI Logic Corporation. All rights reserved.
3.8 GPIO and LED Signals
Table 3.16 describes the GPIO and LED signals group.
3.9 Power and Ground Pins
Table 3.17 describes the Power and Ground signals group.
Table 3.16 GPIO and LED Signals
Signal Name
456-Ball
Package 384-Ball
Package
Type Strength Description
GPIO[7:0] K25, L23,
L25, M25,
H25, K24,
AE25, AC23 A18, D18,
C18, A19,
C16, A17,
T23, T24 I/O 8 mA General purpose I/O pins. The
LSI53C1020 controls these signals
and can configure them as inputs or as
outputs. These pins default to input
mode after chip initialization.
A_LED/ J23 D16 O 12 mA A_LED/ either drives the SCSI
Channel activity LED or provides a
General Purpose I/O pin. A_LED can
be controlled by firmware or driven by
chip activity.
HB_LED/ C25 B11 O 12 mA Firmware blinks Heart Beat LED at a
1.0-second interval when the IOP is
operational.
Table 3.17 Power and Ground Pins
Signal
Name
456-Ball Package 384-Ball Package Type Strength Description
VDD_IO A1, A2, A6, A10, A14,
A18, A22, A26, C7, C11,
C15, C19, C23, D3, E26,
F1, H3, J26, K1, L24, M3,
N26, P1, R24, U26, V1,
Y3, AA26, AB1, AC24,
AD4, AD8, AD12, AD16,
AD20, AE26, AF1, AF5,
AF9, AF13, AF17, AF21,
AF25 D6, D10, D13,
D14, D17, D22,
E23, F4, K4, K23,
N4, N23, P4, P23,
U4, U23, AA23,
AB4, AC6, AC10,
AC13, AC14,
AC17, AC22 P N/A VDD_IO provides
power for the PCI
bus drivers/
receivers, SCSI
bus drivers/
receivers, local
memory interface
drivers/ receivers,
and other I/O pins.