Renesas M16C/60 Series Hardware Manual page 262

Under development
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M16C/6N5 Group
Switching Characteristics
(Referenced to V = 5 V, V
CC
Table 1.21.22 Memory Expansion Mode and Microprocessor Mode (for 1- to 3-wait setting and external area access)
Symbol
t
Address output delay time
d(BCLK-AD)
t
Address output hold time (refers to BCLK)
h(BCLK-AD)
t
Address output hold time (refers to RD)
h(RD-AD)
t
Address output hold time (refers to WR)
h(WR-AD)
t Chip select output delay time
d(BCLK-CS)
t
Chip select output hold time (refers to BCLK)
h(BCLK-CS)
t
ALE signal output delay time
d(BCLK-ALE)
t
ALE signal output hold time
h(BCLK-ALE)
t
RD signal output delay time
d(BCLK-RD)
t
RD signal output hold time
h(BCLK-RD)
t
WR signal output delay time
d(BCLK-WR)
t WR signal output hold time
h(BCLK-WR)
t
Data output delay time (refers to BCLK)
d(BCLK-DB)
t
Data output hold time (refers to BCLK) (Note 3)
h(BCLK-DB)
t
Data output delay time (refers to WR)
d(DB-WR)
t
Data output hold time (refers to WR) (Note 3)
h(WR-DB)
Note 1: Calculated according to the BCLK frequency as follows:
0.5 ✕ 10 9
– 10 [ns]
f(BCLK)
Note 2: Calculated according to the BCLK frequency as follows:
(n – 0.5) ✕ 10
f(BCLK)
Note 3: This standard value shows the timing when the output is off, and does not show hold time of data bus.
Hold time of data bus varies with capacitor volume and pull-up (pull-down) resistance value.
Hold time of data bus is expressed in
t = –CR ✕ ln (1 – V
by a circuit of the right figure.
For example, when V
R =1 kΩ, hold time of output "L" level is
t = – 30 pF ✕ 1 kΩ ✕ ln (1 – 0.2 V
Rev.1.00 2003.05.30 page 248
= 0 V, at Topr = –40 to 85 °C unless otherwise specified)
SS
Parameter
9
n is "1" for 1-wait setting, "2" for 2-wait setting and "3" for 3-wait setting.
– 40 [ns]
When n = 1, f(BCLK) is 12.5 MHz or less.
/ V )
OL CC
= 0.2 V , C = 30 pF,
OL CC
/ V ) = 6.7 ns.
CC CC
Electrical Characteristics
Standard
Measuring
condition
Min.
Figure 1.21.1
4
0
(Note 1)
4
–4
0
0
4
(Note 2)
(Note 1)
DBi
Unit
Max.
25 ns
ns
ns
ns
ns
25
ns
ns
25
ns
ns
25
ns
ns
25
ns
ns
40
ns
ns
ns
R
C