SPNA135A Datasheet, PDF (7/15 Pages) Texas Instruments – Compatibility Considerations: TMS570LS20x/10x to TMS570LS31x/21x

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Package Differences
4 Package Differences
Both the TMS570LS20x/10x and the TMS570LS31x/21x series of microcontrollers are offered in two
packages:
• 144-pin quad flat pack (QFP)
• 337-ball grid array (BGA)
The following sections describe the differences in terms of the pin-out and ball-out for these two packages.
4.1 144 QFP Differences
The LS20x/10x and LS31x/21x microcontrollers are completely different in terms of the 144 QFP pin-out.
An application that uses the LS20x/10x microcontroller in the 144 QFP package cannot use the LS31x/21x
microcontrollers without redesigning the circuit board.
4.2 337 BGA Differences
The LS20x/10x and LS31x/21x microcontrollers are very compatible in terms of the 337 BGA ball-outs
with some significant exceptions. These exceptions are summarized in Table 2 and described in the
sections following the table.
Table 2. LS31x/21x and LS20x/10x Ball-Map Differences
Signal Name
337 BGA Ball# for
LS20x/10x
External Memory Interface (EMIF) Differences
EMIF_BA[0]
D13
EMIF_nOE
D12
EMIF_nDQM[1]
D11
EMIF_nDQM[0]
D10
EMIF_ADDR[5]
D9
EMIF_ADDR[4]
D8
EMIF_ADDR[3]
D7
EMIF_ADDR[2]
D6
EMIF_DATA[4]
E4
EMIF_DATA[5]
F4
EMIF_DATA[6]
G4
EMIF_DATA[7]
K4
EMIF_CLK
–
EMIF_DATA[8]
L4
EMIF_CKE
–
EMIF_DATA[9]
M4
EMIF_DATA[10]
N4
EMIF_DATA[11]
P4
EMIF_nWAIT
–
EMIF_nRAS
–
EMIF_nCAS
–
EMIF_DATA[12]
T5
EMIF_DATA[13]
T6
EMIF_DATA[14]
T7
EMIF_DATA[15]
T8
EMIF_DATA[3]
N16
EMIF_DATA[2]
M16
EMIF_DATA[1]
L16
EMIF_DATA[0]
K16
337 BGA Ball# for
LS31x/21x
E13
E12
E11
E10
E9
E8
E7
E6
E5
F5
G5
K5
K3
L5
L3
M5
N5
P5
P3
R3
R4
R5
R6
R7
R8
N15
M15
L15
K15
SPNA135A – October 2011
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Compatibility Considerations: TMS570LS20x/10x to TMS570LS31x/21x 7
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