µPD703100A-33, 703100A-40, 703101A-33, 703102A-33
(j) CBR self-refresh timing
Parameter
Symbol
<111> tDKRF
Condition
MIN.
2
MAX.
10
Unit
ns
REFRQ active delay time
(from CLKOUT ↑)
REFRQ inactive delay time
<112>
tHKRF
2
10
ns
(from CLKOUT ↑)
CAS hold time
<114>
<115>
tCHS
tRPS
−5
ns
ns
RAS precharge time
(1 + 2wSRW) T – 10
Remarks 1. T = tCYK
2. wSRW: the number of waits due to the SRW0 to SRW2 bits of the RWC register.
TRRW
TH
TH
TH
TRCW
TH
TI
TSRW
TSRW
CLKOUT (Output)
REFRQ (Output)
RASn (Output)
<111>
<112>
<115>
<114>
UCAS (Output)
LCAS (Output)
Output signals
other than above
Remarks 1. This is the timing for the following case.
Number of waits due to the RRW0 and RRW1 bits of the RWC register (TRRW): 1
Number of waits due to the RCW0 to RCW2 bits of the RWC register (TRCW): 1
Number of waits due to the SRW0 to SRW2 bits of the RWC register (TSRW): 2
2. The broken lines indicate high impedance.
3. n = 0 to 7
117
Preliminary Data Sheet U14168EJ2V0DS00
NEC [ NEC ]
