Digi NS7520B-1-C36 Hardware Reference Manual page 300

T i m i n g D i a g r a m s
fp_refresh_cycles
Fast page refresh (RCYC = 00)
BCLK
RAS[4:0]*
CAS3*
CAS2*
CAS1*
CAS0*
WE*
Fast page refresh (RCYC = 01)
BCLK
RAS[4:0]*
CAS3*
CAS2*
CAS1*
CAS0*
WE*
2 8 8
RF1 RF2 RF3
27
43 43
43 43
43 43
43 43
12
RF1 RF2 RF3
27
43 43
43 43
43 43
43 43
12
F
N S 7 5 2 0 H a r d w a r e R e f e r e n c e , R e v G 9 / 2 0 0 7
RF4 RF5 RF6 RF7
27
RF4 RF5 RF6
27
t P R f h (RCYC 01)
RF8 T1
12
RF8 T1
12