CS22250 datasheet(11/32 Pages) CIRRUS

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CS22250 Wireless 10BT Controller

11 of 32

DS551PP2

Rev. 3.0

www.cirrus.com

SMDQM[1:0]

Output

Data mask bit 1:0. These signals function as byte enable lines masking

unwanted

bytes

memory reads

and

write.

Also

used

testmode(1:0) when NTEST pin is '0'.

SMCKE

Output

Clock enable. SMCKE is used to enable and disable clocking of internal

RAM logic.

SMA0

Output

Address bit0.

The address bus specifies either the row address or

column address. Also shared as boot-rom address bit0. This pin should

have a pull-down.

SMA1

Output

Address bit1. Also shared as boot-rom address bit1. This pin should

have a pull-down.

SMA2

Output

Address bit2. Also shared as boot-rom address bit2. This pin should

have a pull-down.

SMA3

Output

Address bit3. Also shared as boot-rom address bit3. Also used during

reset to latch in the strap value for ossel; if set to a '1' implies optslot

mode.

SMA4

Output

Address bit4. Also shared as boot-rom address bit4.

Also used during

reset to latch in the strap value for romcfg. This pin should be pull down.

SMA5

Output

Address bit5. Also shared as boot-rom address bit5. Also used during

reset to latch in the strap value for test_rst_enb; if set to a '0' implies

normal operation mode.

SMA6

Output

Address bit6. Also shared as boot-rom address bit6. Also used during

reset to latch in the strap value for freq_sel(0). Freq_sel(2:0) is used to

select the multiplication factor for the internal PLL (000=1x and 111=8x).

CS22250 Datasheet(PDF) 11 Page - Cirrus Logic

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