STA680 datasheet(17/43 Pages) STMICROELECTRONICS

17 / 43 page

STA680

I/O description

17/43

SDR_D10

in/out

3.3 V

SDRAM IO

Supply

SDRAM bidirectional data bit 10

SDR_D11

in/out

3.3 V

SDRAM IO

Supply

SDRAM bidirectional data bit 11

SDR_D12

in/out

3.3 V

SDRAM IO

Supply

SDRAM bidirectional data bit 12

SDR_D13

in/out

3.3 V

SDRAM IO

Supply

SDRAM bidirectional data bit 13

SDR_D14

in/out

3.3 V

SDRAM IO

Supply

SDRAM bidirectional data bit 14

SDR_D15

in/out

3.3 V

SDRAM IO

Supply

SDRAM bidirectional data bit 15

110

N13

SDR_DQM0

output

3.3 V

SDRAM IO

Supply

low-byte data input/output mask

111

M13

SDR_DQM1

output

3.3 V

SDRAM IO

Supply

high-byte data input/output mask

127

G13

SDR_WE_N

output

3.3 V

SDRAM IO

Supply

Active-low write enable

128

G12

SDR_CAS_N

output

3.3 V

SDRAM IO

Supply

Active-low column address strobe

129

F13

SDR_RAS_N

output

3.3 V

SDRAM IO

Supply

Active-low row address strobe

112

M14

SDR_CKE

output

3.3 V

SDRAM IO

Supply

Clock enable

132

F14

SDR_CS_N

output

3.3 V

SDRAM IO

Supply

Active-low chip select

133

E13

SDR_BA0

output

3.3 V

SDRAM IO

Supply

Bank select address 0

134

E14

SDR_BA1

output

3.3 V

SDRAM IO

Supply

Bank select address 1

138

D14

SDR_A0

output

3.3 V

SDRAM IO

Supply

Address bit 0 toSDRAM

139

C13

SDR_A1

output

3.3 V

SDRAM IO

Supply

Address bit 1 toSDRAM

140

C14

SDR_A2

output

3.3 V

SDRAM IO

Supply

Address bit 2 toSDRAM

141

B13

SDR_A3

output

3.3 V

SDRAM IO

Supply

Address bit 3 toSDRAM

126

H12

SDR_A4

output

3.3 V

SDRAM IO

Supply

Address bit 4 toSDRAM

123

H13

SDR_A5

output

3.3 V

SDRAM IO

Supply

Address bit 5 toSDRAM

Table 2.

Pins description (continued)

Pin #

Ball #

Signal name

Type

Electrical

Supply

group

Description

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