SH7014 Datasheet, PDF (601/754 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

22. Electrical Characteristics (5 V 28.7 MHz)
Notes: n is the number of waits. m is 0 when the number of DRAM write cycle waits is 0, and 1
otherwise. RCD is the set value of the RCD bit in DCR.
1. If the access time is satisfied, t_RDS need not be satisfied.
2. t_WDH (max) is a reference value.
3. The delay time Min values are reference values (typ).
4. t_RDS is a reference value.
5. At 28.7 MHz, t_ASR = 0 ns (min)
Table 22.7 Bus Timing
Conditions: V_CC = 5.0 V ±10%, AV_CC = 5.0 V ±10%, AV_CC = V_CC ±10%, V_SS = AV_SS = 0 V,
Ta = −20 to +75°C
Item
Symbol Min
Max Unit Figure
Write address setup time
t_AS
Write address hold time
t_WR
Write data hold time
t
WRH
Read/write strobe delay time 1 t_RWD1
Read/write strobe delay time 2 t_RWD2
High-speed page mode CAS t_CP
precharge time
0
5
0
2*
2*
t_cyc −25
⎯ ns 22.6 to 22.7
⎯ ns
⎯ ns
18 ns 22.9 to 22.14
18 ns
⎯ ns 22.14
RAS precharge time
CAS setup time
AH delay time 1
AH delay time 2
Multiplex address delay time
Multiplex address hold time
DACK delay time
t
RP
t_CSR
t_AHD1
t_AHD2
t
MAD
t
MAH
t_DACKD1
t × (TPC + 1.5) − 15 ⎯
cyc
10
⎯
2*
18
2*
18
2*
18
0
⎯
2*
21
ns 22.9 to 22.14
ns 22.15, 22.16
ns 22.17
ns
ns
ns
ns 22.6, 22.7, 22.9 to
22.14, 22.17
Notes: TPC is the set value of the TPC bit in DCR.
* The delay time Min values are reference values (typ).)
Rev.5.00 Sep. 27, 2007 Page 567 of 716
REJ09B0398-0500