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MISCELLANEOUS
Data Device Corporation DS-BU-648X3X-H
www.ddc-web.com 6/11
Table 53. Miscellaneous
Signal Name All
Versions
Ball Description
With 64K
RAM
BU-6486X
With 4K RAM
BU-6484X
TX_INH_A (I) A20 Transmitter inhibit inputs for Channel A and Channel B, MIL-STD-1553
transmitters. For normal operation, these inputs should be connected to
logic "0". To force a shutdown of Channel A and/ or Channel B, a value of
logic "1" should be applied to the respective TX_INH input.
TX_INH_B (I) D20
MSTCLR D18
(I) Master Clear. Negative true Reset input, normally as serted low following
power turn-on.
TAG_CLK (I) D23 Time Tag Clock. External c l ock that may be used to increment the Time
Tag Register. This opt ion is selected by setting Bits 7, 8 and 9 of
Configuration Register # 2 to Logic "1".
BC_Disable B21 Hardware lock out to disable BC opertation and operate the part in RT-Only
mode. Drive high to disable BC, low to enable all modes of operation.
Table 54. No User Connections
Signal Name T(U) Version Ball H (I) Version Ball Description
NC
A4, A5, A6 , A7 , A8, A11 , B4 ,
B5, B13, B19, C1, C2, C3,
C4, C5, C13, C19 , D4, D5,
D6, D7, D13, E1, E2, E3,
E4, E5, E6, E7, E8, E16,
E20, F4, F5, F6, F7, F8, F9,
F1 0, F2 0, G 1, G 2, G3, G4,
G5, G10, G15, G16, G20,
H4, H5, H6, H7, H8, H9,
H11, H12, H13, H14, H15,
H16 , J1, J2, J3, J4 , J5, J6 ,
J7, J8, J12, J13, J15, K4,
K5, K6, K7, K13, K15, K17,
K20, L1, L2, L3, L4, L5, L13,
L18, L19, L20, L21, M4, M5,
M8, M21, N4, N5, N6, N7,
N8, N10, N11, N14, N15,
N21
A4, A5, A6, A7, A8, A11,
B4, B5, B13, B19, C1, C2,
C3, C4, C5, C13, C19, D5,
D6, D7, D13, E5, E6, E7,
E8, E16, E20, F5, F6, F7,
F8, F9, F10, F20, G1, G2,
G3, G4, G5, G10, G15,
G16, G20, H5, H6, H7, H8,
H9, H11, H12, H13, H14,
H15, H16, J5, J6, J7, J8,
J12, J13, J15, K5, K6, K7,
K13, K15, K17, K20, L1,
L2, L3, L4, L5, L13, L18,
L19, L20, L21, M4, M5, M8,
M21, N4, N5, N6, N7, N8,
N10, N11, N14, N15, N21
No User Connections to these balls allowed.