SPRS457E
– MARCH 2009 – REVISED JUNE 2011
Table 2-5. Pin Descriptions (continued)
Name
BGA
Type
Group
Power
IPU
Reset
Description(4)
ID
(1)
Supply(2)
IPD(3)
State
VSSA18_DAC
E11
GND
Video
Video DAC: Analog 1.8-V ground
DAC
Note: If the DAC peripheral is not used, this pin must
be tied directly to VSS for proper device operation.
VSSA12_DAC
F11
GND
Video
Video DAC: Analog 1.2-V ground
DAC
Note: If the DAC peripheral is not used, this pin must
be tied directly to VSS for proper device operation.
DDR_CLK
W11
O
DDR
VDD18_DDR
DDR Data Clock
DDR_CLK
W12
O
DDR
VDD18_DDR
DDR Complementary Data Clock
DDR_RAS
U12
O
DDR
VDD18_DDR
DDR Row Address Strobe
DDR_CAS
V12
O
DDR
VDD18_DDR
DDR Column Address Strobe
DDR_WE
W13
O
DDR
VDD18_DDR
DDR Write Enable
DDR_CS
T12
O
DDR
VDD18_DDR
DDR Chip Select
DDR_CKE
R13
O
DDR
VDD18_DDR
DDR Clock Enable
DDR_DQM[1]
W6
O
DDR
VDD18_DDR
Data mask input for DDR_DQ[15:8]
DDR_DQM[0]
T11
O
DDR
VDD18_DDR
Data mask input for DDR_DQ[7:0]
DDR_DQS[1]
T7
I/O
DDR
VDD18_DDR
Data strobe input/outputs for each byte of the 16-bit
data bus used to synchronize the data transfers.
Output to DDR2 when writing and inputs when
reading. They are used to synchronize the data
transfers.
DDR_DQS1: For DDR_DQ[15:8]
DDR_DQS[0]
T10
I/O
DDR
VDD18_DDR
Data strobe input/outputs for each byte of the 16-bit
data bus used to synchronize the data transfers.
Output to DDR2 when writing and inputs when
reading. They are used to synchronize the data
transfers.
DDR_DQS0: For DDR_DQ[7:0]
DDR_DQSN[1]
U6
I/O
DDR
VDD18_DDR
DDR: Complimentary data strobe input/outputs for
each byte of the 16-bit data bus. They are outputs to
the DDR2 when writing and inputs when reading.
They are used to synchronize the data transfers.
Note: This signal is used in double ended differential
memory interfaces supported by the device.
DDR_DQSN[0]
U9
I/O
DDR
VDD18_DDR
DDR: Complimentary data strobe input/outputs for
each byte of the 16-bit data bus. They are outputs to
the DDR2 when writing and inputs when reading.
They are used to synchronize the data transfers.
Note: This signal is used in double ended differential
memory interfaces supported by the device.
DDR_BA[2]
V13
O
DDR
VDD18_DDR
Bank select outputs. Two are required for 1Gb DDR2
memories.
DDR_BA[1]
T13
O
DDR
VDD18_DDR
Bank select outputs. Two are required for 1Gb DDR2
memories.
DDR_BA[0]
W14
O
DDR
VDD18_DDR
Bank select outputs. Two are required for 1Gb DDR2
memories.
DDR_A13
T16
O
DDR
VDD18_DDR
DDR Address Bus bit 13
DDR_A12
V17
O
DDR
VDD18_DDR
DDR Address Bus bit 12
DDR_A11
W18
O
DDR
VDD18_DDR
DDR Address Bus bit 11
DDR_A10
V16
O
DDR
VDD18_DDR
DDR Address Bus bit 10
DDR_A9
U16
O
DDR
VDD18_DDR
DDR Address Bus bit 09
DDR_A8
W17
O
DDR
VDD18_DDR
DDR Address Bus bit 08
DDR_A7
T15
O
DDR
VDD18_DDR
DDR Address Bus bit 07
DDR_A6
W16
O
DDR
VDD18_DDR
DDR Address Bus bit 06
28
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2009–2011, Texas Instruments Incorporated