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Last update: 4 January 2004

IC number:MC68851 (XC68851)
IC function:PMMU (Paged Memory Management Unit)
Related components:MC68020 (main processor), MC68030 , MC68040 (successors, on-chip MMU)

Component documentation
IC numberManufacturerDocumentation
MC68851 (XC68851)MotorolaM68000 family reference (book)

Component versions
IC numberPackageSpeed
MC68851RC16 (XC68851RC16)Ceramic 132-Pin PGA 13 × 1316 MHz

Positions
DevicePositionPackageSpeed
A2620U202PGA16 MHz

Pinout
PinTypeName
A1OutputPA23
A2..A3OutputPA29..PA30
A4Input_LAS
A5Output_LBRO
A6Input_LBGI
A7Input_LBRI
A8Output_CLI
A9Output_PBG
A10Input_PBGACK
A11I/O_DSACK0
A12I/OSIZ1
A13Input_RESET
B1OutputPA19
B2..B3OutputPA25..PA26
B4OutputPA28
B5Output_PAS
B6I/O_LBGACK
B7PowerVCC
B8I/O_HALT
B9Input_PBR
B10I/OSIZ0
B11I/O_DS
B12I/O_RMC
B13I/OD3
C1OutputPA18
C2OutputPA22
C3InputCLK
C4OutputPA27
C5OutputPA31
C6Output_LBGO
C7PowerGND
C8I/O_BERR
C9I/O_DSACK1
C10I/OR/_W
C11OutputDBDIS
C12I/OD0
C13I/OD4
D1OutputPA15
D2..D3OutputPA20..PA21
D4OutputPA24
D5PowerVCC
D9PowerGND
D10Input_ASYNC
D11..D12I/OD1..D2
D13I/OD7
E1OutputPA14
E2..E3OutputPA16..PA17
E4PowerGND
E10PowerVCC
E11..E12I/OD5..D6
E13I/OD8
F1..F3OutputPA11..PA13
F11..F13I/OD9..D11
G1OutputPA10
G2PowerVCC
G3PowerGND
G11PowerGND
G12PowerVCC
G13I/OD12
H1..H3OutputPA9..PA7
H11..H13I/OD15..D13
J1I/OA6
J2..J3I/OA4..A3
J4PowerVCC
J10PowerGND
J11..J12I/OD19..D18
J13I/OD16
K1I/OA5
K2I/OA0
K3I/OFC3
K4I/OFC0
K5PowerGND
K9PowerVCC
K10I/OD26
K11..K12I/OD23..D22
K13I/OD17
L1I/OA2
L2I/OFC2
L3InputLA31
L4InputLA28
L5InputLA24
L6InputLA20
L7PowerGND
L8InputLA14
L9InputLA10
L10I/OD30
L11I/OD27
L12I/OD24
L13I/OD20
M1I/OA1
M2..M3InputLA30..LA29
M4InputLA27
M5InputLA23
M6InputLA19
M7PowerVCC
M8InputLA15
M9InputLA11
M10I/OD31
M11..M12I/OD29..D28
M13I/OD21
N1I/OFC1
N2..N3InputLA26..LA25
N4..N5InputLA22..LA21
N6..N8InputLA18..LA16
N9..N10InputLA13..LA12
N11..N12InputLA9..LA8
N13I/OD25

Copyright © 2003-2004 Ronald van Dijk - All rights reserved