¡ Semiconductor

MSM548331

15/23

Write Cycle (WE Control)

Write Cycle (IE Control)

Note : In the WE =" L" cycle, the write address pointer is not incremented and no DIN data is written.



WCLK

N CYCLE

(N-1)CYCLE

(N-2)CYCLE

(N+2) CYCLE

(N+1) CYCLE

Low

WADE/RX

—

—

IE

—

—

—

—

WXINC

—

—

WE

—

—

DIN0 - 11

—

—

High

Low

WR/TR

—

—

Low







Valid

D(N+2)

Valid

D(N+1)







Valid

D(N)





Valid

D(N-1)





Valid

D(N-2)



Valid

D(N-3)



WCLK

Low

WADE/RX

—

—

WE

—

—

—

—

WXINC

—

—

IE

—

—

DIN0 - 11

—

—

High

Low

WR/TR

—

—

Low







Valid

D(N+3)

Valid

D(N+2)







Valid

D(N)





Valid

D(N-1)





Valid

D(N-2)



Valid

D(N-3)

N CYCLE

(N-1)CYCLE

(N-2)CYCLE

(N+3) CYCLE

(N+2) CYCLE

Note : In the IE = "L" cycle, the write address pointer is incremented, though no DIN data is written

and the memory data is held.