DRM-ULV16
26
1
2
3
4
1
2
3
4
C
D
F
A
B
E
Power and Ground Pins
Power and Ground
Pin
Type
Description
VDD
SCSI
C5, C9, C13, E3, E15, J3,
J15, N3, N15, R5, R9, R13
I
Power supplies to the SCSI bus I/O pins.
VDD
CORE
B8, K3, K15, U8
I
Power supplies to the CORE logic.
VDD
IO
A2
I
Power supplies to the I/O logic.
VSS
C7, C11, G3, G7, G8, G9,
G10, G11, G15, H7, H8,
H9, H10, H11, J7, J8, J10,
J11, K7, K8, K9, K10, K11,
L3, L7, L8, L9, L10, L11,
L15, R7, R11
I
Ground ring.
NC
A1, A3, A4, A5, A17, B3,
B4, B7, C4, C6, C14, C15,
D3, F3, F15, H15, L2, P15,
R4, R10, R12, T1, U1, U6,
U16, U17
N/A
No Connections.
Chip Interface Control Pins
Control
Pin
Type
Description
RESET/
A7
I
Master Reset for LSI53C180, active LOW.
WS_ENABLE/
B5
I
Enable/disable SCSI transfers through the LSI53C180.
XFER_ACTIVE
A6
O
Transfers through the LSI53C180 are enabled/disabled.
CLOCK
C8
I
Oscillator input for LSI53C180 (40 MHz).
BSY_LED
B6
O
SCSI activity LED output, 8 mA.
Pin Function (2/2)
