www.ti.com

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

337 BGA Ball# for

337 BGA Ball# for

Signal Name

LS20x/10x

LS31x/21x

External Memory Interface (EMIF) Differences

EMIF_BA[0]

D13

E13

EMIF_nOE

D12

E12

EMIF_nDQM[1]

D11

E11

EMIF_nDQM[0]

D10

E10

EMIF_ADDR[5]

D9

E9

EMIF_ADDR[4]

D8

E8

EMIF_ADDR[3]

D7

E7

EMIF_ADDR[2]

D6

E6

EMIF_DATA[4]

E4

E5

EMIF_DATA[5]

F4

F5

EMIF_DATA[6]

G4

G5

EMIF_DATA[7]

K4

K5

EMIF_CLK

–

K3

EMIF_DATA[8]

L4

L5

EMIF_CKE

–

L3

EMIF_DATA[9]

M4

M5

EMIF_DATA[10]

N4

N5

EMIF_DATA[11]

P4

P5

EMIF_nWAIT

–

P3

EMIF_nRAS

–

R3

EMIF_nCAS

–

R4

EMIF_DATA[12]

T5

R5

EMIF_DATA[13]

T6

R6

EMIF_DATA[14]

T7

R7

EMIF_DATA[15]

T8

R8

EMIF_DATA[3]

N16

N15

EMIF_DATA[2]

M16

M15

EMIF_DATA[1]

L16

L15

EMIF_DATA[0]

K16

K15

7

SPNA135A

– October 2011

Compatibility Considerations: TMS570LS20x/10x to TMS570LS31x/21x

Submit Documentation Feedback

Copyright

© 2011, Texas Instruments Incorporated