LSI Symbios SYM53C040, Technical Manual

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Safety Mode Signals 3-11
MPIO3_
[3:0]
87
86
85
84 J10
K12
K11
L13
Multipurpose I/O bank 3
MPIO3_0 = INT0/ to
microcontroller, if 0xFF05 bit 0
is set (active low).
MPIO3_1 = INT1/ to
microcontroller, if 0xFF05 bit 0
is set (active low).
MPIO3_2 = TXD from
microcontroller, if 0xFF05 bit 1
is set.
MPIO3_3 = RXD to
microcontroller, if 0xFF05 bit 1
is set. 4 mA, 5 V tolerant
TTL bidirectional 25
µ
A
pull-
down
MPLED
0_
[7:0]
42, 41, 40,
39, 37, 36,
35, 34
J5, L3,
K4, L2,
K3, L1,
J4, K2
Open drain multipurpose LED
bank 0 outputs. Any unused
LED outputs must be tied to
V
SS
or resistively pulled HIGH.
16 mA, 5 V tolerant
TTL open drain
bidirectional None
MPLED
1_
[7:0]
61, 60, 59,
58, 56, 55,
54, 53
K7, N7,
M7, L7,
J6, N6,
M6, L6
Open drain multipurpose LED
bank 1 outputs. Any unused
LED outputs must be tied to
V
SS
HIGH.
16 mA, 5 V tolerant
TTL open drain
bidirectional None
MPLED
2_
[7:0]
82, 81, 80,
79, 78, 77,
75, 74
J9, L11,
K10,
M11,
L10, N11,
K9, M10
Open drain multipurpose LED
bank 2 outputs. Any unused
LED outputs must be tied to
V
SS
or resistively pulled HIGH.
16 mA, 5 V tolerant
TTL open drain
bidirectional None
TESTIN 155 D5 This pin should be tied LOW
during normal operation. 5 V tolerant TTL
input None
CLK_S
EL
157 C4 When this signal is tied HIGH,
the internal clock will be the
same as the external. When
LOW, the external frequency is
divided by 2. 5 V tolerant with TTL
input bidirectional 100 µA
pull-up
CLK 152 F6 40 MHz system clock input. 5 V tolerant TTL
input None
Table 3.5 Miscellaneous Signals (Cont.)
Pin
Name
Pin
Number
BGA Ball
Number Description Pad Type
Internal
Resistor