CS89712-CB View Datasheet(PDF) - Cirrus Logic

Part Name

Description

MFG CO.

CS89712-CB

High-Performance, Low-Power System-on-Chip with 10BASE-T Ethernet Controller

Cirrus Logic 

CS89712

CLK

CKE

nCS

nRAS /

nCAS / nWE

DQM

DQ

Bank sel

A10

(prech sel)

addr

T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11

1 dev

1 dev

CAS lat 3

NOP ACT NOP READ NOP NOP NOP NOP NOP NOP NOP NOP (ACT)

tRCD

tRAS

tRP

auto precharge

tRC

bank

bank

row

row

col

DI0 DI1 DI2 DI3

Note: tRC1 (REF to REF/ACT command period [refresh]) = 90 ns or 4 cycles at 36 MHz.

Figure 28. SDRAM Read Cycles CAS Latency = 3

CLK

CKE

nCS

nRAS /

nCAS / nWE

DQM

DQ

Bank sel

A10

(prech sel)

addr

T0 T1 T2 T3 T4 T5 T6 T7

1 dev

1 dev

NOP ACT NOP WRITE NOP NOP NOP NOP NOP (ACT)

tRCD

tRAS

tDPL

tRP

auto precharge

tRC

DO0 DO1 DO2 DO3

bank

bank

row

row

col

Note: tDPL (data in to PRE command period command) = 10 ns or 1 cycle at 36 MHz.

Figure 29. SDRAM Write Cycles

156

DS502PP2

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